Solar System Editor Plugin: Wrong epoch of Mean Anomaly

Bug #836839 reported by Manfred Dings
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Stellarium
Fix Released
High
Bogdan Marinov

Bug Description

When downloading the Soft00Bright.txt with orbital elements of Asteroids I found, that the Epoch of the Mean Anomaly is computed in a wrong way. The elements from the MPC usually are give to 0h Terristrical Dynamical Time, that is a Julian Date in the form of 24xxxxxx.5 (.5 at the fractional part of the Number).

The plugin seems to round the Julian Date to 12h TDT (.0 at the fractional part). For instance the bright astroid Vesta is displaced for approximately 1 minute in Right Ascension.

Nevertheless: That's a good tool, thanks to Bogdan Marinov.

Manfred Dings

Related branches

Revision history for this message
Bogdan Marinov (daggerstab) wrote :

Thank you for reporting this and for pointing out the reason in your e-mail! I'll try to fix it right away.

Changed in stellarium:
assignee: nobody → Bogdan Marinov (daggerstab)
importance: Undecided → High
milestone: none → 0.11.1
status: New → In Progress
Revision history for this message
Bogdan Marinov (daggerstab) wrote :

A fix has been committed to the trunk branch as revision 4955:
http://bazaar.launchpad.net/~stellarium/stellarium/trunk/revision/4955

While this fixes this particular issue, Stellarium's projected orbit positions for asteroids don't correlate well with other sources even with the same input (orbital elements). Perhaps a review of the Solar System code is needed.

Changed in stellarium:
status: In Progress → Fix Committed
Changed in stellarium:
status: Fix Committed → Fix Released
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