Jump to content




Recommended Posts

The RA+Dec of the sun alters daily, so to track it the scope needs so sort of alignment performed in order to have an initial position and so apply the appropriate movement - more applicable to Alt/Az. However I also think that without at least some "alignment" for the goto aspect the software may well do almost nothing. One of the problems of software that requires alignment is that some form of alignment needs to be done.

Sun RA+Dec is here: http://astropixels.com/ephemeris/sun/sun2016.html

Makes interesting reading to see the annual (even daily) change that occurs. So Synta have either added a similar table as a look up or there is an equation from which to calculate the position daily and they have added that.

Concerning accidentally viewing the sun I suppose that at some point you have to make the presumption that the perspn has the intelligence to have some idea what they are doing. Small Meades have simply decided that there is no such object as the sun, no solar rate and no way to "accidently" point at it. Makes solar viewing a bit more involved as I have to enter Sol as a custom object, enter the RA+Dec for that day and then Level and North the mount. Then tell it to goto the custom object I called Sol. Tracking is then totally reliant of the Level+North set up. Equally on an Skywatcher EQ everything is reliant on the polar alignment and Polaris is difficult to align on at 2:00pm in the afternoon on a clear sunny day. Have to admit that solar viewing has some interesting aspects.


  • Like 1
Link to comment
Share on other sites

  • 2 weeks later...


I have done a firmware update on my Synscan hand controller  to the latest update  and I am now getting an error message when I do my alignment wether it be 1 2 or 3 the hand reads 

CAUTION: Prev. NPE applied  does anyone know what this means  the mount is HEQ5 Pro and works fine and all objects show in the FOV when slewed to.

Any help much appreciated



Link to comment
Share on other sites

NPE = Non Perpendicular Error, occurs when mount's two axes are non-orthogonal, according to my version if the Synscan  manual.  Can be set to 0 via  Setup/Alignment/ NP Error unless 'superior pointing accuracy is required'.



Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.