SkEye – A push to finder app

SkEye is an app that like the excellent Stellarium allows you to find objects in the sky. It dispenses with ‘bells and whistles’ so there are no pretty constellation images but that functionality suits me fine. With a phone attached to the tube of my telescope, it also has the advantage of what is termed Indirect mode. Indirect mode allows me to locate objects using “push-to” so what I see on the screen is what I (should) see through the eyepiece.

I have become more proficient in using SkEye to locate objects over time as I have become more familiar with it. Knowing its quirks and foibles really does help.

For finding dim and difficult objects, I also use this method.

Key points

  • I use a phone mount that I purchased for cycling. It attaches to the EP tube of my straight-through finder.
  • I have tried using the phone so that screen points upwards (as in the picture) and also towards the eyepiece (in landscape mode) so it is facing me. The latter makes scanning a bit of the sky to see what is there very easy. I have found a number of DSOs and binaries “by accident” in this way.
  • The initial alignment was made using three easy to find objects. For example Arcturus, Mars, Castor and Polaris.
  • After a period of use, I use the Insta-align function when I have acquired an object to improve accuracy.
  • I still use the straight-through finder but not as often; so my back is grateful. I have a Telrad and use this to check that SkEye isn’t way off. The finder is used if an object doesn’t come into view of my WA 42mm EP.
  • When I get dew or ice on my Telrad or finder, SkEye has been my only tool and has come to the rescue.
  • The Telrad, finder, wide-angle (low power) eyepiece and SkyEye work together. 
  • SkyEye has its quirks. It can suddenly jump a few degrees but does seem to “find itself” again. I have not any stray magnetism warnings due to the metal OTA but this could be the cause of the jumping.

Update following a period of use

Alignment is very quick using a couple of good targets and then an insta-align “check” to keep things precise.

It can sometimes “forget where it is”, but a second later it catches up and it is often spot on target. I keep the magnetometer calibrated with a figure of 8 calibration. The author has an app for calibrating the magnetometer (instructions) and I find this works well.

I also tried using an old Samsung A3 phone rather than my main one (OnePlus 8 Pro) and although the screen is noticeably smaller it works fine once calibrated.

A major plus is that unlike my Telrad and finder scope it doesn’t suffer from dew or ice!

Given that the app was free, I am delighted with the results, so in order to support the developer (who offers brilliant support) I bought the Pro version (about £8) which has more objects and also allows me to add my own database of binary stars

I’ve now changed the finder to a right angle type (RACI), so I now use a 1m cable tie and attach the phone mount to the clip of that. It is surprisingly secure.

Note that dim objects like galaxies and some nebulae may need additional methods to find them.

More details

https://lavadip.com/skeye/index.html 

https://lavadip.com/skeye/book 

https://lavadip.com/skeye/media/v0_skeye_user_manual.html

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Categorised as Review

8 comments

  1. I’d like to know more info on why your dob needs to be on a level surface to use this app. I know that sounds logical, but when I used to use my old NGC max digital setting circles on my 22 inch inch dob, all you had to do to start was point the scope straight up and hit “vertical” as a command to the unit. It didn’t matter if your scope was on an incline because the computer was using the info on the positions of your two guide starts to determine the angle of your target.
    Maybe this system is different, but I’d like to know if you encountered issues where it wouldn’t work correctly because your scope was on an incline. Primarily because my observing site is on a slight hill on very lumpy ground.
    I would love to use this system with my ten and 22 inch dobsonians.

    1. Given that SkEye uses the phone to identify position, you are correct that other than for reasons of stability, there is no need for the base to be horizontal. I have updated the post accordingly. Thank you for the feedback.

  2. I saw your comment on Reddit and this review helps. I’m stuck between getting a Go-To and Dobsonian, and this may seal the deal on getting a Dobsonian.

  3. Great info very informative. The cable tie idea is great. I’ve recently been looking for a method of attaching the Starsense explorer dock onto my Dob. This I think is what I’ll be doing I can leave my little scope as is for my son. Get some cable ties and this app and I’m good to go don’t have to mess with my Dob with screw holes or double sided tape etc

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