Align equatorial mount when unable to see pole star (north or south)

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Eyes on the Sky

Eyes on the Sky

Күн бұрын

Can't see Polaris or Sigma Octans from where your telescope is set up? You can still align an eq mount - here's how! David Fuller with Eyes on the Sky shows how to set up a German equatorial mount if trees, a building or something else keeps you from seeing the northern or southern celestial pole star from where you want to set up. You can even align if it is cloudy or full daytime and you want to set up for solar observing or later night time observing. This is only for visual observing or very wide-angle astrophotography.
Original EQ mount video: • Learn how to easily al...
How to use/aim an EQ mount: • How to use (aim) your ...
NOAA magnetic field calculator (to calculate degrees off true north): www.ngdc.noaa.gov/geomag/calc...
Eyes on the Sky website: www.eyesonthesky.com
Telescopes On The Sky videos: eyesonthesky.com/tutorials/te...
#withcaptions

Пікірлер: 168
@Seafox0011
@Seafox0011 3 жыл бұрын
One of the original KZfaqrs offering astronomy advice. Much appreciated and learned so much from your videos, many thanks!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
So very kind of you to say. Thank you very much.
@DeuteriumTech
@DeuteriumTech 3 жыл бұрын
I really love the very informative no-BS style of these videos!
@entropytango5348
@entropytango5348 3 жыл бұрын
Great simple video without all the hype, nicely done and thanks
@zenom9333
@zenom9333 3 жыл бұрын
Im very happy youtube recommended this for me, very helpful! Great video sir
@walrusrobot5483
@walrusrobot5483 Жыл бұрын
It's amazing that a hobby so based on optics and clarity can produce such a blurry ass video.
@Eyesonthesky
@Eyesonthesky Жыл бұрын
*goes to check WalrusRobot's high quality, super-duper focus video content* Zero videos. I mean, ok bro. You sure got me there.
@walrusrobot5483
@walrusrobot5483 Жыл бұрын
@@Eyesonthesky someone doesn't need to be a chef to tell they are hungry. To see that this video was produced in 2020 is hysterical.
@Eyesonthesky
@Eyesonthesky Жыл бұрын
@@walrusrobot5483 I will be sure to tell my wife that her efforts to learn the camera and assist me were mocked by you. So good job with that here in 2022.
@joeimbesi99
@joeimbesi99 Жыл бұрын
One of the best alignment tutorials anywhere..BRAVO
@Eyesonthesky
@Eyesonthesky Жыл бұрын
Thank you! Please feel free to share it with others too.
@dr.mayurpatel8709
@dr.mayurpatel8709 3 жыл бұрын
Many of my friends from Astronomy groups suggested me to buy a Alt Az Mount telescope but this channel encouraged me to buy a telescope with equatorial mount and now I am really enjoying the sky gazing... Thank you...
@taraskravchuk9139
@taraskravchuk9139 3 жыл бұрын
Thank you, David, for your amazing job you've been doing all these years! I remember you 10 years ago. Your videos inspired me to buy muy first telescope in 2013, which I am still using! For me as a beginner at that time you were a true guide into a fascinating world of stargazing. And I'm so happy that you are still on track! You know, 10 years have passed and symbolically the difference between our locations is almost 10 degrees! Regards from latitude 50,8! Regards from Ukraine!
@DavidRamirez-ck2ph
@DavidRamirez-ck2ph 3 жыл бұрын
Wow, another great video. The compass thing just blew my mind. Thanks
@Redpaperrose
@Redpaperrose 3 жыл бұрын
you called Pluto a planet... that alone warrants a like. Great video - very useful - thanks
@Jgawalters72
@Jgawalters72 3 жыл бұрын
Thanks for that David. I have my 8" Newtonian on a homemade mobile "observatory". It is terrible, but beats carrying out 100 pounds every time I want to observe. This helps since I like to get out there and set up to allow the scope to acclimatize, before or as night falls. I'm hoping I can get the great conjunction tonight... I know I can with my 70 mm refractor, but want to see that much better with the 8". And YAY for PLUTO!!
@theastro-philosophersappre2786
@theastro-philosophersappre2786 3 жыл бұрын
Great video, the information was very easy to follow. Too many guys go over the topics so fast... there’s so much to learn. Thanks💫
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Glad it was helpful!
@ireneuszmarcinkowski9316
@ireneuszmarcinkowski9316 2 жыл бұрын
Thank you for this film. Helped me a lot.
@marvingarden4587
@marvingarden4587 2 жыл бұрын
Thank you for simplifying this process!! cheers
@julianparks8485
@julianparks8485 2 жыл бұрын
Excellent David! Still good! I have been using my GP and GPDX2 mounts for years. Another thing I do is mark in the ground or in my case on the roof of my building where the tripod legs go so I do not have to redo the rough alignment.
@MrGp3po
@MrGp3po 2 жыл бұрын
Fun to watch early videos. Your production quality is vastly improved!
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
Thank you!
@jons2447
@jons2447 3 жыл бұрын
Hello, Mr. Fuller; Thank you for all you do. Great video, enjoyed it. Have a GREAT day, day Neighbor!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thanks, you too!
@VincentGroenewold
@VincentGroenewold 3 жыл бұрын
Your first video from 10 years ago actually made me sane again after starting with my first one in 2015. Thanks man! :) For photographers it's a bit more frustrating, not having that star in view. Luckily software these days helps a lot.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
This is definitely not for most astrophotographers, as it wouldn't be sufficiently precise. It's okay for very wide field photos, but not much else. Fine for visual, of course. And yes, the software available today is amazing! Glad my original video helped you. :)
@oceandojo
@oceandojo 2 жыл бұрын
Excellent vid, love the ending
@MountainFisher
@MountainFisher 2 жыл бұрын
I just bought a 102mm refractor on an EQ mount and this was very helpful. I'm fortunate as my apt. building is on a north south alignment so I can use it off my back porch when I don't need a full sky which means taking apart and packing it up. First thing is take that 10 lb. counter-weight off, makes moving the tripod a lot easier.
@someoneelse1904
@someoneelse1904 3 жыл бұрын
Fantastic video. Thanks for the valuable info.
@iganin3
@iganin3 3 жыл бұрын
Excellent video, will help me allot with the eq3 mount.
@woldsweather
@woldsweather 2 жыл бұрын
Thanks for that after a year at this I finally see what a meridional flip is!
@tispecs4812
@tispecs4812 3 жыл бұрын
Awesome as Always👍
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thank you!
@MrPINKFLOYDUK
@MrPINKFLOYDUK 3 жыл бұрын
My view to the north is totally blocked by trees, so I lost interest turning both controls at the same time to then lose the image. Although I did get a good view of Saturn early on. This has inspired me to get the scope out again and follow your guidance. Thanks for this.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
I hope you have great success! It is so much simpler to observe an object when all that's required is the RA drive (or slow motion control) is set to account for Earth's rotation.
@benc7102
@benc7102 3 жыл бұрын
Great ending ! Gold Cheers from oz
@kevinsmith7068
@kevinsmith7068 Жыл бұрын
Great video!
@FosterFarmsOk
@FosterFarmsOk 3 жыл бұрын
Another great Video. Always enjoy them. The gas chainsaw sound really goes nice with the electric chainsaw LOL.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Meant to be 100% cheesy and totally "Dad joke". :)
@FosterFarmsOk
@FosterFarmsOk 3 жыл бұрын
@@Eyesonthesky I enjoyed it.
@GHP15300
@GHP15300 3 жыл бұрын
@@Eyesonthesky it's really funny and relatable to my situation
@jongroubert4203
@jongroubert4203 3 жыл бұрын
Congratulations on TEN YEARS!!!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thank you sir! I guess that means I'm old now?? Lol.
@fsellersf
@fsellersf 3 жыл бұрын
I liked your first video but this is even better, esp since I have that same mount!! good job and nice to see your helper.
@kimberlyfuller995
@kimberlyfuller995 3 жыл бұрын
Great to be seen, Frank! Hope you guys are doing well! 😊
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thank you Frank! I know a lot of people have the CG-4, and it's decent quality at a budget price. Plus the black knobs on the white background showed up better for a video. And Kimberly is incredibly helpful! Ken P. says I should have her in more videos. :-)
@fsellersf
@fsellersf 3 жыл бұрын
@@kimberlyfuller995 Looking forward to the end of 2020and getting back to normal. Hope to see you again! Going to spend our first winter in warm weather and dark skies.
@kimberlyfuller995
@kimberlyfuller995 3 жыл бұрын
Nicely done!!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thanks! Nice acting skills and ASL there at the end. :)
@theastro-philosophersappre2786
@theastro-philosophersappre2786 3 жыл бұрын
Great acting indeed💫
@yobaby14
@yobaby14 3 жыл бұрын
David, thank you. I'm glad I found your channel a few years back. I swore up and down I wouldn't get a GEM, but use alt-az mounts exclusively. I've had an Orion SkyView Pro on back order for almost a month now. My ES 152 Mak, at 17 pounds factory, but closer to 19-20 pounds with a RACI and 2" EP, was already marginal on the Twilight I that it came packaged with a few years ago. From the reviews of the SVP it sounds like it should work quite well with the 152 Mak, and probably also with the AR152 achro (23 pounds) that appeared out of nowhere in the back room. (Geeee...I wonder how that got there!?) It wasn't until I watched your original video on setting up GEM's, and then this one, that I realized the GEM may actually make it easier to find targets using the RA and Dec on the mount, rather than doing finder scope sweeps with the alt-az mount or trying to get the alt-az settings to jive with one of the phone apps.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
You would need very precise polar alignment to do celestial coordinates (I just cover general alignment), but using a GEM is sooooo much easier when tracking things across the sky, especially at higher magnification.
@poplof2050
@poplof2050 3 жыл бұрын
Ow waw.. I'm feeling nostalgic when i see this video🤣, i was wondering it's that the same mount that you use 10 years ago? I hope you stay healthy david so you can make more videos like this in the future😁
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Nope, it is not the same mount, but they are the same tripod legs I made for that other mount in the first video (which I sold a long time ago). And thank you! Please stay safe and healthy also.
@ken-ec9wv
@ken-ec9wv 3 жыл бұрын
thank you so much for helping us get the most out of this crazy thing called astronomy 🪐
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
You're welcome! When I get the Telescopes On The Sky series done, I am going to try to get some budget astrophotography basics videos started.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
@@paca_bill4863 hey... now you're giving me cheesy Dad-joke video ideas for the future... !
@JoshuaDircks
@JoshuaDircks 2 жыл бұрын
Thank you for this! Just got our first 'real' telescope with EQ mount. We live back up against a hill and houses and trees block the pole star.
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
You're welcome - glad it helped!
@pierauspitz
@pierauspitz 2 жыл бұрын
Nice vid, thanks! Fun fact: when Polaris is not available is the only time you MUST have a perfectly level mount to do a proper polar align, as you rely on the latitude graduations and bearing shooting to have as accurate an alignment as you can. But when a visual acquisition of Polaris is possible, mount leveling does not matter as much, as aligning a line (RA axis) to a point (Polaris) can be achieved regardless. (of course you do need sufficient level to not topple the rig)
@robaston8106
@robaston8106 3 жыл бұрын
Superb.!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thank you! Cheers!
@forresterickson6225
@forresterickson6225 2 жыл бұрын
It would be helpful to show the two extremes of latitude at north pole and at equator. This will help the beginner understand what the RA axis is doing when set at the intermediate actual latitude.
@TheCosmicGuy0111
@TheCosmicGuy0111 2 жыл бұрын
Legit tysm 🙌🏻
@cosmictywlite
@cosmictywlite 3 жыл бұрын
Congrates on ten years of great info about the Stars & Planets David, Great video about the true poles, when I am Looking for Sigma Octans from 27 degree S I have to move my Compass 11 degree to the east & that gets me nearly there . ie do you think electric pole Finders are any good ,Cheers David
@paulcizdziel3769
@paulcizdziel3769 3 жыл бұрын
Hi David. Being new to astrophotography, I appreciate the video and will check out more from you. Had a detailed thought to share. Another alternative to using a compass to find true north is to use SkySafari Plus or similar apps. WIth these apps, one can "see through" objects to the projected stars on the celestial sphere, and thus know the exact location of Polaris even if you cannot really see it. This might be a good double-check for the compass method you propose. Also, one could take the tripod/mount combo to another location temporarily to align the altitude to Polaris there (where it is visible) and lock it down. Once transported back to the viewing location with the angle still intact, all one needs to do is level the tripod to have the right altitude at that point. Then the only worry is Azimuth alignment toward north as we just discussed (compass and/or SkySafari). Finally, having done all that (or some combination) it is possible to fine tune the overall alignment even more. I recently discover a seldom used technique called "drift alignment" using a double-lined reticule eyepiece. After rough alignment, by watching a star drift away from the cross-hairs, it become possible to fine-tune adjustments to Alt or Az to precision. Definitely a slow process I suspect, but very effective. So I guess, depending on how precise you want to be, there are multiple options to get rough alignment or very fine alignment without seeing Polaris. I am going to try all of this soon since my backyard (here in Japan) is very limited to the vertical and certainly has no view of Polaris. But depending on the time of year, there are lots of things worth photographing that are high in the sky!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
All valid! I just was making a more basic video for the purposes of showing a simpler version of how to get it accomplished.
@paulcizdziel3769
@paulcizdziel3769 3 жыл бұрын
Understood. I intend to try it all at the next available opportunity once rainy season ends here in Tokyo. What I suggest may not be obvious to many, unless they really dedicate some thought to it. Maybe I should videotape my efforts?
@dannygnaniah7552
@dannygnaniah7552 2 жыл бұрын
Vest info so far those of us living near the equator or the southern hemisphere with no view of polaris…Thank You
@yousmehratube
@yousmehratube 3 жыл бұрын
Good vids. In fact I watch your 10 years old video just last week.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thanks!
@batwithglasses
@batwithglasses 3 жыл бұрын
Thanks so much David for all that you put into this channel, it has helped me greatly over the years. Funny, my wife stopped me the other day from using a chainsaw to prune the shrubs😁👍
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Hedge trimmers!!! 😂😁
@batwithglasses
@batwithglasses 3 жыл бұрын
@@Eyesonthesky 🤣
@NatarajanGanesan
@NatarajanGanesan 3 жыл бұрын
You need to do another one on Drift alignment too
@avt_astro206
@avt_astro206 3 жыл бұрын
Awesome as Always👍 Still Remember as Chessy😉 You were 10 years Ago😄😄.!!!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Never was good at good jokes, so might as well keep the cheesy ones. :-)
@chadr2604
@chadr2604 5 ай бұрын
I always pointed at Mizar then just moved over. The electronic mounts you can point it at Betelgeuse, Sirius, etc.
@DeuteriumTech
@DeuteriumTech 3 жыл бұрын
I've been doing this method. Is there a way to aim the EQ to Polaris more accurately? The longest exposure I was able to pull off with a 560mm scope on a RA motor is 4 seconds before the effects of drift show up. I'm also curious if the Dec motors that can be attached to these mounts can run slow enough to account for the drift when take long exposures.
@psionicjake
@psionicjake 2 жыл бұрын
I had a tree in the way after setting up my telescope in the front yard. Same "noooooooo!" hahaha!
@brprajwal
@brprajwal 2 жыл бұрын
Latitude setting also depends on the landscape u r currently are. The angle is very much relative. The view angle of pole star at ground level is different from view angle from 80 storey building.
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
No. At 400 light years distant, the angle is the same to Polaris whether ground level or at an 80 story height.
@randallpatrickc
@randallpatrickc 2 жыл бұрын
Hi tried something like this the other day and I assume that the true north versus compass north is called variation or something like that? In addition I think that you can use your smart phone level to set your latitude degrees directly on the mount? That seems to be much more accurate than using the scale on the telescope mount.
@rudolfbermuehler6674
@rudolfbermuehler6674 3 жыл бұрын
I think about how accurate this settings are, concern my exposure time? Like for a 200 mm lens, in direction to the milkyway?!
@gravijta936
@gravijta936 3 жыл бұрын
I have to wonder if the compass on a phone could be accurate enough. I know they need to be calibrated regularly, but the app I have takes care of magnetic declination and displays my latitude too, which is handy. I think I'll give it a try in the next few weeks.
@gravijta936
@gravijta936 3 жыл бұрын
Oh, and I also have a level on my phone, which again, I'm not sure if it would be accurate enough, but worth a try.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Both can be used in a pinch. But if you do this regularly, a good compass and level would be worth the investment.
@ShevillMathers
@ShevillMathers Жыл бұрын
Mobile phones have your location including height above sea level. Another app to make life easier is an angle indicator, the settings on the mount are usually a mile off. Your phone also has a compass and level indicator. Note that true north and celestial north/south have a declination variation east or west from the magnetic pole, which is slowly changing over the years. Greetings from Tasmania Australia-Southern Cross Observatories-42 South 147 East.
@bobwilkinson6828
@bobwilkinson6828 Жыл бұрын
As you're also in Australia can you confirm that in using this method of polar alignment that your initial setup is simply align to magnetic south rather than north as the video shows. I'm an absolute newbie so still trying to get comfortable with stargazing.😊
@ShevillMathers
@ShevillMathers Жыл бұрын
@@bobwilkinson6828 Find your declination variation from South (southern hemisphere) mine in southern Tasmania is almost 15 degrees east, so using the compass on my phone I look south, turn my phone until it points 15 degrees east and that is where I point my scope mount. This will get you in the ball park. Look at a few more 'How to Polar Align in the southern hemisphere if still unsure, there are many good video's out there. I also level my mount first so that any adjustment in azimuth does not change my declination angle. Hope this helps.
@bobwilkinson6828
@bobwilkinson6828 Жыл бұрын
@@ShevillMathers Thank you so much. I'll search for my locations declination and set up over the weekend. 👍👍👍
@bruceyoung9791
@bruceyoung9791 3 жыл бұрын
I recently moved into a house where the biggest oak tree blocked view of Polaris. Very frustrating trying to guesstimate setup for motor driven scope. I commented to my wife that " I wish that tree wasn't there". Unbeknownst to me the owner must have called a tree crew. By the end of the day that tree was gone. It opened up that whole north area of the sky and made it so easy to polar align on Polaris. I t
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
That there is known as serendipity... excellent news! And if you set up somewhere else where Polaris is blocked, you still know how now. :)
@bruceyoung9791
@bruceyoung9791 3 жыл бұрын
Sometimes I admit Polaris lil difficult to see as not so bright. Poss light pollution where I live.
@dr.mayurpatel8709
@dr.mayurpatel8709 3 жыл бұрын
This KZfaq channel makes me intermediate Astronomer from amateur. Thank you Sir. As usual I have again one silly question. What should be the RA position of telescope during perfect polar alignment? I'm asking for RA position not RA reading. Thank you...
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Thank you for the kind words. For RA in polar alignment, do not use the RA of Polaris or even aim towards it to set RA. Once you are polar aligned, aim the telescope at a star well away from the pole, 45 to 90 degrees away, and then set the RA setting circle to match the RA of that star. Then lock the RA setting circle (if you are using a motorized drive). I hope that is helpful! Clear and dark skies.
@dr.mayurpatel8709
@dr.mayurpatel8709 3 жыл бұрын
Thank you sir for your reply and guidance. I hope you will always guide all of us in such lucid manner.
@jimzeleny7213
@jimzeleny7213 3 жыл бұрын
Use I phone compass on the front face of the RA axis.
@willrothfuss8470
@willrothfuss8470 2 жыл бұрын
David, I get a lot out of your videos and have built your table top tripod. Question: Why not use the compass app on your phone, which can be set to true north? Do you feel this is not as accurate? Also I have aligned using this method. It's close, but never close enough to track with just the RA control. Need occasional Dec adjustments. Can you cover the drift alignment technique ( if I have that right) that uses a star near the celestial equator to tweak alignment?
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
I've had sometimes excellent and sometimes very poor results with compass apps on phones. I did not want people to assume that their phone would work as well as mine, so I suggested an inexpensive compass. If I can ever find a spare moment, I may be able to make a new video someday. Drift alignment is not very high up on that list, however.
@calebbautista7243
@calebbautista7243 3 жыл бұрын
Hey David, I have the same mount as you and I was wondering what polar finder did you buy? The one made for the mount has a lot of bad reviews so I’m looking for another one that will fit. Thanks!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
I bought my mount used and the polar scope came with it.
@JeremiahDsilva
@JeremiahDsilva 3 жыл бұрын
Amazing information. Could you please help on how to I set the RA setting circle.. I have an EQ 1 and the RA setting circle is free dial that moves when turned.. Is there a way to set it right.. Thx in advance
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
To be honest, the setting circle.on an EQ1 is too small to be useful. It is more decorative than anything.
@Astronurd
@Astronurd 28 күн бұрын
There's no real need to level an EQ mount although it's still good practice to do so.
@JamieS1992
@JamieS1992 Жыл бұрын
im trying to learn this so i know if its worth investing in a star tracker but i am a little fearful because i am south so i need to see the 4 sigma stars but some of them cant be seen by the naked eye
@Eyesonthesky
@Eyesonthesky Жыл бұрын
You can use this method of alignment even in the southern hemisphere for any visual observing.
@winstonsmith-ministryoftru1609
@winstonsmith-ministryoftru1609 3 жыл бұрын
Hey, look, he's got a full body! :P
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Well shoot - now I've gone and destroyed the myth that I am a disembodied, floating head within Stellarium...
@lalunaraggio31
@lalunaraggio31 2 жыл бұрын
Please I’m 3 degrees longitude and 6 degrees latitude and my we mount isn’t positioning right because the weight keeps hitting the mount . What do I do ?
@duststar1265
@duststar1265 Жыл бұрын
Nice video David, I have a question, which is the mount's name?
@Eyesonthesky
@Eyesonthesky Жыл бұрын
It's a Celestron CG-4 equatorial mount.
@charlessands6933
@charlessands6933 3 жыл бұрын
How are you going to know if you have a compass that will allow you to make that adjustment?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Look for one that has a declination adjustment.
@kevinjoffe6500
@kevinjoffe6500 2 жыл бұрын
Do you still aim north in Southern hemisphere and do you use your South latitude? Thanks
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
Aim the mount south to the southern celestial pole. There are some tutorials on how to estimate where it is using the Southern Cross if you cannot see 5th magnitude Sigma Octans.
@Handles-R-Lame
@Handles-R-Lame 3 жыл бұрын
I remember my first meridian flip, it was quite the challenge lol then once i did it i was like wow.. that was too easy..
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Easier with a refractor. Those reflectors can be tricky until you realize you have to spin the tube!
@Handles-R-Lame
@Handles-R-Lame 3 жыл бұрын
@@Eyesonthesky no kidding! My 8 inch Meade makes my Cassegrain and Maks look easy..🔭
@render66
@render66 3 жыл бұрын
May be I'm wrong but ... it would not be easier to level and balance the telescope before to try to aim the celestial north?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Well, sure. Except the video is about how to aim at the celestial north pole when the pole star is blocked or not visible. How do you aim the mount north when you cannot see the pole star? What are you going to use to aim at? And how do you know you're level if you don't know if you're aimed at the pole star while trying to aim north? That's why I said at the beginning it requires doing two things in tandem.
@warrenpayne5669
@warrenpayne5669 3 жыл бұрын
Nice, thanks! What's the drive you have attached to this mount?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
It is the standard Celestron motor drive package for this particular mount.
@warrenpayne5669
@warrenpayne5669 3 жыл бұрын
@@Eyesonthesky ah ok - thanks!
@Navigatorbythestars
@Navigatorbythestars 3 жыл бұрын
Hello David, If you had the choice between a Tele Vue Nagler 7mm or a Tele Vue Nagler 9mm which one would you pick and why?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
It would depend entirely on what telescope it was being used in.
@Navigatorbythestars
@Navigatorbythestars 3 жыл бұрын
@@Eyesonthesky I have an 8” dob.1200mm . I thought I’d get you opinion, I keep going back and forth on the pros and cons of both. You seem to be very knowledgeable on the subject. I was hoping you could help on this decision. Thanks so much!
@astrobenn_
@astrobenn_ 3 жыл бұрын
I have been searching everywhere for a Video like this! Thank you! I have a tree that is right in my way of Polaris! I have just used the calculator and it says 0° 8' E difference - Excuse my rookie ignorance but what way would I need to adjust the position? Thank you in advance :) Liked and Subbed!
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
For that small difference (just over 1/8 of one degree) for visual observing, just aim it magnetic north and you will be fine.
@astrobenn_
@astrobenn_ 3 жыл бұрын
@@Eyesonthesky Thank you! I'm guessing with AP I need to try and find a way to get it accurate without having to be able to see Polaris?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
@@astrobenn_ you would probably want to drift align or use another precise polar alignment method for AP, yes.
@carlitosscova7451
@carlitosscova7451 3 жыл бұрын
What is the name of the mount you are using? Looks like a good and reliable mount.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Celestron CG-4. One of the better small/inexpensive EQ mounts.
@jeffreysmith6910
@jeffreysmith6910 3 жыл бұрын
David, what scope is on your Omni mount?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
It is an Astrotech AT72EDII. Nice little telescope for astrophotography. I just need to work on my focusing skills.
@DK-df2hi
@DK-df2hi Ай бұрын
Could you use the iPhone compass?
@dr.mayurpatel8709
@dr.mayurpatel8709 3 жыл бұрын
I do have one silly question. What should be the RA and Dec reading when we have perfect polar alignment?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
It depends on where your telescope is pointed. If it is directly at the celestial pole in the home position, it will be at 90 degrees declination and the RA can be set to anything. But when you go to an object, the RA will need to be adjusted to match the RA of that object. But most small equatorial mounts do not have accurate enough setting circles or precise enough motions to make the setting circles useful.
@dr.mayurpatel8709
@dr.mayurpatel8709 3 жыл бұрын
@@Eyesonthesky thank you sir... That means first I should point my telescope to true NCP as per your suggestion with DEC @ 90° and later point it to any known star and adjust RA... Is it?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
@@dr.mayurpatel8709 yes, correct.
@denodan
@denodan 3 жыл бұрын
With a goto celestron mount its much easier. They have a polar alighment feature and takes no time at all. Get celestron goto eq mount its a breeze. A good video though
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
So, you're offering to buy one for everyone, right?
@DaveFer
@DaveFer 2 жыл бұрын
Hey, great video. Thanks for doing this. I was referred to your video by a helpful astronomer to help me answer a very specific question about the Equatorial grid and eq. mounts. I understand it all for the most part. But there is one crucial puzzle piece I'm missing and social media folks always seem to sidestep my question by referring me to the AltAz system of location. Here's my question: If I have Eq coordinates for a celestial object and my Eq mount is perfectly aligned to true N and level ... how can I locate the object using only the Eq coords. Don't I need to do some calculation to account for the time in my location? In Stellarium, it's easily demonstrable that the Eq grid rotates in the sky (rather the earth rotates within the Eq grid). So ... an object with fixed Eq coords will appear in a different place in the sky depending on the time. So ... there has to be some time-correction on top of the Eq coordinates in order for me to locate the object. Am I wrong in this? No one seems to understand or acknowledge this question. So I would appreciate your input. THANKS!
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
I think I understand what you are asking. You would need to aim at an object of known coordinated (let's say the star Sirius). The declination number should be correct. But you would need to rotate the Right Ascension axis to the RA of Sirius. Then you can locate other objects by using the celestial coordinates. Does that answer your question? I hope it does. If not please let me know. (Incidentally, the objects on the sky don't move, they only appear to as Earth rotates.)
@DaveFer
@DaveFer 2 жыл бұрын
​@@Eyesonthesky Wow, thanks for quick response! Right ... yes, of course earth is moving. But as I suspected, a typical user of Eq coords would first spot an obvious object of known Eq coords and then adjust to different coordinates. So they are essentially sync'ing their mount against a known object ... using it like a waypoint or mile marker. But ... if the sky were blank. Or if I'm looking at something of known Eq coords and talking to a remote observer in a different time zone and directing them to Eq coords hh:mm:ss (let's set aside declination for now). There needs to be some adjustment for time in the discussion. No? I mean an object at Eq coords X appears to move thru the sky with time ... the relative position changes, but the Eq coords do not change, right? So ... something is missing from the discussion and I believe it's TIME (local hour). Maybe I'm confused (that's a distinct possibility). But I'm looking at Stellarium which allows me to slew thru time quickly and I am seeing the Eq grid appear to move across the sky and objects in the sky are fixed to the Eq grid. So if I want to use only Eq coords to find an object, I need to account for local time when sighting the object. Correct?
@DaveFer
@DaveFer 2 жыл бұрын
Better, simple examples: If you and I are tasked with writing a computer program that would point a telescope precisely to specific Eq coordinates, blindly, without the user siting anything ... let's assume the Eq mount is perfectly oriented and level and corrected for local latitude: Doesn't our programming need to know the precise time? In order to correctly point to the Eq coordinates? (After all, the relative position in the sky of those coords changes with time, no?)
@Eyesonthesky
@Eyesonthesky 2 жыл бұрын
@@DaveFer I see what you're saying. But think of it this way. If both you and a friend in a different time zones are both aligned/aimed at Sirius and both have your equatorial mounts set to it, his is already pointing in a different direction from yours - even thought you're both aimed at Sirius. And the relative distance to any other known object is the same. So if you slew to a different object 23 degrees away, so will he - and he will have the same object in view. Yes, they appear in different parts of the sky. But they are the same distance from the same known object (Sirius). So it always works. That's why the coordinates are set to the stars (that are fixed), and not Earth (which rotates).
@DaveFer
@DaveFer 2 жыл бұрын
@@Eyesonthesky Exactly ... users typically use a known, easily-sighted object as a reference point. Great. But where is the origin for the ascension coordinate? The 00:00:00 ascension origin. I can see it in Stellarium and I can use Stellarium to show me when it will be be directly overhead ... but no one is giving me the answer as to how to estimate where to look for Eq coordinates at any given hour (a priori, without a waypoint or Stellarium). Thank you for acknowledging the question and your quick responses. :) Best wishes. - DaveFer
@tubedude54
@tubedude54 Жыл бұрын
I've gotten lucky... this yr the tree that has blocked my view of polaris died!! So looking forward to having it removed next yr! (no... I didn't kill it lol)
@lornaz1975
@lornaz1975 3 жыл бұрын
Is there any reason you are using wooden legs on your tripod? Reason I ask is I have heard that they are more sturdy than metal legs. I don't know if that is true and really would not know why it would be true.
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
For this particular tripod, it had more to do with the fact that I bought the mount new (no legs) and had the existing legs that I'd made. But to your point: Yes, wooden legs help dampen vibrations faster than metal ones do. The metal "rings" longer, whereas solid wood has better damping ability. Though wood is used in instruments for tone/sound, think about the difference of how long a metal xylophone "rings" versus a wooden one does. The wood one has a shorter length tone. The metal one rings longer. That's due to the vibrations.
@lornaz1975
@lornaz1975 3 жыл бұрын
@@Eyesonthesky Thanks. That makes sense. I have heard that wooden legs were preferred but never knew why.
@jodyschultz5870
@jodyschultz5870 Жыл бұрын
Use NINA to do a 3 point PA.
@Eyesonthesky
@Eyesonthesky Жыл бұрын
Not very useful for people just doing visual observing though (which is who this video is for).
@pim1234
@pim1234 3 жыл бұрын
But like this you are not aimed at the Pole star, so this is unusable for tracking and goto mounts ?
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
This is perfectly adequate for visual observing and short exposure astrophotography down with wide angle lended. It will also allow owners of GoTo mounts to set up with sufficient precision to get good two or three star alignments.
@pim1234
@pim1234 3 жыл бұрын
@@Eyesonthesky ok, tnx
@PafMedic
@PafMedic 2 жыл бұрын
I Have No Clue What Of Anything You Just Done…Im Just Going To Send Everything Back
@DannyOvox3
@DannyOvox3 3 жыл бұрын
Shout out to Pluto :(
@Eyesonthesky
@Eyesonthesky 3 жыл бұрын
Pluto is still a planet!!
@gloubiboulgazeblob
@gloubiboulgazeblob 3 жыл бұрын
When you turn your main axis, strictly speaking, you're not moving in RA but you're changing the Hour Angle. This is a very common and very bad mistake spread among ALL amateur astronomers on the net, it confuses ALL beginners... In fact, Hour angle and RA are part of the same equation : HA (Hour Angle) = LST (Local Sideral Time) - RA (Right Ascension). This a formula ANY astronomer should know, this is the basic of celestial mechanic.Know it, use it and it will save you lot of time and confusion. Your main circle graduation are hour angles, not right ascensions. Think about it a second : since the circle can be fixed on most equatorial mounts, what really happens if you fix it and you consider these are RA graduations ? It's quite simple : you've stopped the Earth's rotation ! When the elescope is in its park position : hour angle is 6H. When your telescope points a star due south, hour angle is OH (telescope East of your mount) or 12H (telescope west of your mount) YOUR local sideral time equals the right ascension of a star that is due south : HA = LST - RA 0 = LST - RA LST = RA If you want to find any celestial object, you need its hour angle by using the formula if you know YOUR LST or use an application like Stellarium for instance which gives you the hour angle of all objects at any time. Use it to point your telescope at the object (if you don't have a Goto system). The smartest ones will understand that a polar scope is theorically not needed if you know the polaris hour angle... Clear skies !
@charlesfick729
@charlesfick729 Жыл бұрын
Very good tutorial…..yes, hedge trimmers don’t work well to cut a tree down, you silly person….🤪🤪😃😃
@salutcmanek9609
@salutcmanek9609 2 жыл бұрын
Pluto is not a planet
@andrefreitas3907
@andrefreitas3907 7 ай бұрын
"Pluto is still a planet"... just dumb. Ruined the entire class at once ahaha 👎
@5729ariel
@5729ariel Жыл бұрын
Great video!
@Eyesonthesky
@Eyesonthesky Жыл бұрын
Thank you!
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