[Kstars-devel] Bug in moon position?

[Jason Harris]

Ouch.  I'm surprised by this because in the past, KStars has been  
found to do a good job of predicting solar eclipses, which obviously  
requires very accurate moon positions.

Maybe there's been some kind of regression in recent commits, but it's  
a bit of a mystery, because the code to compute the moon's position  
hasn't been changed AFAIK.

I'll see if I can confirm the problem...

thanks,
Jason

On May 29, 2008, at 11:21 AM, Akarsh Simha wrote:

> Hi
>
> I was just fiddling with the conjunction tool, while I noticed what
> seems like a glaring discrepency in KStars. The occultation of Mars by
> the Moon on May 10th 2008 never turned up. I went to that particular
> date and time and tried checking up the RA and Dec of Moon / Mars.
>
> While the RA/Dec of Mars is in good agreement with that generated from
> JPL's HORIZONS and CalSky.com, The moon's RA seems to have about half
> an hour's difference, and the Dec about half a degree difference! [I
> don't know if I messed up with something here!]
>
> Date/Time: 10th May 2008, 20:37 +05:30
> Location: Bangalore, India [77d35m E, ~13d N]
>
> Moon's RA/Dec reported by KStars:
> RA ~ 07h 41m, Dec ~ 21d 12m
>
> Moon's RA/Dec reported by HORIZONS:
> RA ~ 8h 11m, Dec ~ 21d 50m
>
> Could somebody verify this? What can this be due to?
>
> Regards
> Akarsh
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