
Phone app to locate stars
#1
Posted 22 July 2019 - 05:36 PM
Does anyone know of any phone app similar to what I am describing.
Colton
#2
Posted 22 July 2019 - 06:33 PM
It is pretty straightforward to use
Edited by wrnchhead, 22 July 2019 - 06:33 PM.
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#3
Posted 22 July 2019 - 06:40 PM
I doubt there are any apps that actually use the phone camera for finding anything in the sky. Probably a phone camera by itself isn't able to pick up any stars at all. All the apps I am familiar with use other sensors on the phone to figure out where you are pointing it.
#4
Posted 22 July 2019 - 06:50 PM
I like SkySafari and Skyview. These both help myself a lot. I don't care how it locates but transparent screen with stars in the background helps me be a better at my hobby. The real stars are on the display with background stars. These programs will help a lot when locating constellations, planets, stars and asteroids plus much more.
Mike
#5
Posted 22 July 2019 - 06:50 PM
Yeah, I meant that axis. The axis of the phone camera. I stated that awkwardly.
#6
Posted 22 July 2019 - 06:55 PM
There's no better device to identify bright stars than a planisphere.
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#7
Posted 22 July 2019 - 07:07 PM
I agree with IMB
And learning the sky manually I think it's great and rewarding.
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#8
Posted 22 July 2019 - 08:14 PM
#9
Posted 22 July 2019 - 08:44 PM
It's a hobby of observation, you can take your time and look at the stars, use a tool such as this one bellow and identify the constellations. It's fun to memorize the bright stars and the position of the various constellation. The cellphone might be great but the screen is bright and harmful for the dark adaptation even in red night mode, I prefer not to use it at all, only the planisphere with a dim red light.
After, you can find deep sky objects even in light pollution with much more ease. It's an invaluable skill to develop I think.
https://www.davidcha...es-star-charts/
(You need to pick the closest planisphere for your latitude.)
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#10
Posted 23 July 2019 - 01:31 AM
I recommend Sky Guide App for iPhone and Android. It doesn't control a scope like Sky Safari or SkyPortal, however its a lot easier to use and more accurate at location stars or anything in the night sky including satellites etc. Plus it plays cool background music for stargazing, and lastly I think there is a free version but the paid version is 2.99
https://apps.apple.c...#?platform=ipad
https://play.google....ky guide&c=apps
Edited by Mike91977, 23 July 2019 - 01:36 AM.
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#11
Posted 23 July 2019 - 03:37 AM
Couple of points here, well to me.
First is that Celestron uses a lot of possible alignment stars, and many are a bit odd. Odd as in for some reason not obvious ones.
Another is that if you track down the list each has a month against them. I suspect that Month takes precedence over what to us would make more sense. I have never worked out why they select Algieba in preference to Denebola or Rugulus.
I think there is a method to override the selected/offered star and pick your own. Again my experience is that not all are offered. I was stood outside one night withw a Celestron CPC 1100 with a nice bright high Vega and not being offered to use it as an alignment star.
You need to find out how to scroll uo and down the list of offered alignment stars - actually think all you do is press the Up or Down button and the next one is displayed, but only 75% sure.
Next you need to just get outside and work out about a dozen of the bright stars.Vega, Deneb, Altair, Arcturus, Capella, Pollux+Castor, Caph, Alpheratz, Aldebaran, Betelgeuse, Rigel, Sirius, Procyon, Denebola, Regulus.
Not all are visiable at present but you will need some idea of the presently available ones (Easy = Vega, Deneb, Altair, Arcturus). Then the idea is you stand there with the scope, identify say 5 that you can see and when the alignment star is presented you scroll up/down and pick ones you can see. You will not have time to read the offered one, then hold a phone/app up to work out which one it is and where it is.
Meade I think got the alignment star eaier. No month just big bright standalone stars, often red ones - Arcturus and Aldebaran - they stand out very easily. You center the big bright red one in the middle. Hopefully you would have some idea which the big bright one is.
Celestron have I think a Bright Star alignemnt - you aim at and center any 3 bright ones, reasonably well apart and the scope works out the likely 3 and does the rest.
There is a lot of manual input in a computerised automatic scope.
App: Skysafari, the Plus version is easily adaquate.
Planisphere, easy does not need batteries. Does need 2 paperclips (Stops the 2 bits rotating)
Edited by sg6, 23 July 2019 - 03:40 AM.
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#12
Posted 23 July 2019 - 04:51 AM
+1 with skysafari. Been using it for years both in android and ios.
I don't think they use the wrong name for stars, especially with obvious bright alignment stars. I suggest learning how to read asterisms and constellations first.
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#13
Posted 23 July 2019 - 05:34 AM
What I am trying to say is, don't over-think it. The alignment isn't trying to confuse you by showing a star field with multiple targets and testing you to pick the right one. You can get a good startup alignment with only a rudimentary grasp of the constellations and a few common stars.
+1 on the planisphere.
#14
Posted 23 July 2019 - 10:18 AM
Couple of points here, well to me.
First is that Celestron uses a lot of possible alignment stars, and many are a bit odd. Odd as in for some reason not obvious ones.
Another is that if you track down the list each has a month against them. I suspect that Month takes precedence over what to us would make more sense. I have never worked out why they select Algieba in preference to Denebola or Rugulus.
I think there is a method to override the selected/offered star and pick your own. Again my experience is that not all are offered. I was stood outside one night withw a Celestron CPC 1100 with a nice bright high Vega and not being offered to use it as an alignment star.
You need to find out how to scroll uo and down the list of offered alignment stars - actually think all you do is press the Up or Down button and the next one is displayed, but only 75% sure.
Next you need to just get outside and work out about a dozen of the bright stars.Vega, Deneb, Altair, Arcturus, Capella, Pollux+Castor, Caph, Alpheratz, Aldebaran, Betelgeuse, Rigel, Sirius, Procyon, Denebola, Regulus.
Not all are visiable at present but you will need some idea of the presently available ones (Easy = Vega, Deneb, Altair, Arcturus). Then the idea is you stand there with the scope, identify say 5 that you can see and when the alignment star is presented you scroll up/down and pick ones you can see. You will not have time to read the offered one, then hold a phone/app up to work out which one it is and where it is.
Meade I think got the alignment star eaier. No month just big bright standalone stars, often red ones - Arcturus and Aldebaran - they stand out very easily. You center the big bright red one in the middle. Hopefully you would have some idea which the big bright one is.
Celestron have I think a Bright Star alignemnt - you aim at and center any 3 bright ones, reasonably well apart and the scope works out the likely 3 and does the rest.
There is a lot of manual input in a computerised automatic scope.![]()
![]()
App: Skysafari, the Plus version is easily adaquate.
Planisphere, easy does not need batteries. Does need 2 paperclips(Stops the 2 bits rotating)
#15
Posted 23 July 2019 - 11:02 AM
Sky Safari works very well. Additionally it has an 'AR' or Augmented Reality function that overlays your actual surroundings as seen by the phone's camera on the sky map. This makes it easier to locate or identify exactly what star you are looking at.
#16
Posted 23 July 2019 - 12:36 PM
The issues lies in that the your phone's gyro and magnetic compass are being distorted by magnetic interference. Even if you're out in a field away from any metal sources there are even geological features under ground that can emit strong enough magnetic forces to throw off your phone's "compass". You can calibrate it somewhat by waving your phone around several times in front of you in a figure 8 motion and flipping the phones screen screen facing up and down while in the process. This allows the sensors to read the weaker magnetic forces from multiple angles and then the software that produces the data from the sensor gets corrected to the stronger magnetic north. See the video posted below.
After you do that you'll nee a noted difference in accuracy. IF you start noticing it drift again simply do the calibration motion again.
https://www.youtube....h?v=J_cZnPcW-Yw
#17
Posted 23 July 2019 - 01:07 PM
As far as having the right star, I've thought sometimes aligning with camera and sharpcap that I had the right one. But seemed like it should probably be brighter. A little more panning around, and yep, wasn't right. Not even close as bright!
#18
Posted 23 July 2019 - 01:22 PM
Couple of points here, well to me.
First is that Celestron uses a lot of possible alignment stars, and many are a bit odd. Odd as in for some reason not obvious ones.
Another is that if you track down the list each has a month against them. I suspect that Month takes precedence over what to us would make more sense. I have never worked out why they select Algieba in preference to Denebola or Rugulus.
I think there is a method to override the selected/offered star and pick your own. Again my experience is that not all are offered. I was stood outside one night withw a Celestron CPC 1100 with a nice bright high Vega and not being offered to use it as an alignment star.
You need to find out how to scroll uo and down the list of offered alignment stars - actually think all you do is press the Up or Down button and the next one is displayed, but only 75% sure.
Next you need to just get outside and work out about a dozen of the bright stars.Vega, Deneb, Altair, Arcturus, Capella, Pollux+Castor, Caph, Alpheratz, Aldebaran, Betelgeuse, Rigel, Sirius, Procyon, Denebola, Regulus.
Not all are visiable at present but you will need some idea of the presently available ones (Easy = Vega, Deneb, Altair, Arcturus). Then the idea is you stand there with the scope, identify say 5 that you can see and when the alignment star is presented you scroll up/down and pick ones you can see. You will not have time to read the offered one, then hold a phone/app up to work out which one it is and where it is.
Meade I think got the alignment star eaier. No month just big bright standalone stars, often red ones - Arcturus and Aldebaran - they stand out very easily. You center the big bright red one in the middle. Hopefully you would have some idea which the big bright one is.
Celestron have I think a Bright Star alignemnt - you aim at and center any 3 bright ones, reasonably well apart and the scope works out the likely 3 and does the rest.
There is a lot of manual input in a computerised automatic scope.
![]()
![]()
App: Skysafari, the Plus version is easily adaquate.
Planisphere, easy does not need batteries. Does need 2 paperclips
(Stops the 2 bits rotating)
Good post. My older Nexstar 11 GPS does use Vega as the first alignment star during the summer months, which makes sense to me. I have noticed what you are saying with my CG5 ASGT, where some obvious choices are ignored - go figure.
#19
Posted 23 July 2019 - 05:05 PM
Thanks Everyone... I really appreciate all the help and advice.. I should be able to go out this weekend and try again.
#20
Posted 23 July 2019 - 06:08 PM
Good luck!
John
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