Stellarium ~ Carte Du Ciel discrepancy

[chrisp9au]

Now this has got me interested/worried.
What worries me most is that I'm about to make an absolute fool of myself! :D

For the occultation of Jupiter by the Moon on Monday February 18th,
Stellarium 0.12.0 and Carte Du Ciel 3.6-2150 are showing completely different occultation times.

Both Stellarium and CDC show Sunset to be at 20:14 local time, no worries.
Both are setup for my location, accurate to the arc second.

Moving forward from Sunset to 21:08 local time...

Stellarium shows, Pic 1, the occultation of Jupiter commencing at 21:08:46
CDC, at the exact same time, shows, Pic 2, a wide separation.

Moving forward in CDC to 23:32 local time...
Pic 3 shows the CDC display with the occultation commencing.

Now, I suspect there is something screwy with Stellarium,
but whether it's my settings or the Stellarium ephemeris I don't know?
As far as I can tell, my settings are exactly the same in both programs.

Can anyone explain the 2 1/2 hour discrepancy? :shrug:
Can anyone replicate this?

Thanks :thumbsup:

Chris

PS If I've done or said anything stupid, please be gentle in your response! Thank you!

[bojan]

CdC v2.76c shows the same as V3.

In the past, CdC (2.76c) was accurate and reliable.
I had some similar issues with Stellarium, that is why I am still using CdC v2.76c (I am accustomed to older version.. so why change if it works OK).

[Steffen]

FWIW, SkySafari Pro 1.7.3 seems to agree with CdC, it puts the occultation (centre of Jupiter) at 23:32:43h for Melbourne.

Cheers
Steffen.

[chrisp9au]

Thanks Bojan,

Yes, CDC is reliable although the display in the later versions seems a clunky these days, takes for ever to update when you slew the display. Mouse control is a waste of time too.

I checked SkySafari Plus on my Nexus 7 for the occultation; confirmed the time of 23:32.

It would appear to be a problem with the Stellarium ephemeris data for Jupiter.

Cheers :thumbsup:

Chris

[chrisp9au]

Thanks Steffen!

[chrisp9au]

OK, I un-installed Stellarium, removing all traces of it.
Have now loaded version 11.4 and the occultation timing is correct.

Maybe it's a problem with version 12, I'll stick to this old version for now.

Cheers :thumbsup:

Chris

[Barrykgerdes]

Hi Chris

I think there was a bug in the first release of 0.12.0. There have been over 100 changes since then

My 0.12.1 version does not have an occulation at all for Sydney. But When I set Melbourne the oculation starts at about 23:31

You can find a later version here:

https://launchpad.net/stellarium/+download

Barry