Visual Magnitude Values Are Inconsistent

[Cyphedeous]

The visual magnitude values are inconsistent with other accurately
published sources such as the Astronomical and Nautical Almanacs. For
instance, Jupiter should be mag. -2.3 during during the mid to last half of
November and in Stellarium it's otherwise. Carts du Ceil seems to have it
right.

[barrykgerdes (barrygastro)]

Hi

That is interesting. I checked and Stellarium gives a visual magnitude of -1.94 and the program I wrote years ago from Peter Duffet-Smith's book gives -2.4 (-2.3x). Stellarium may have an error in the magnitude calculation algorithm.

Barry Gerdes
Beaumont Hills Observatory
S 33' 41' 44" E 150' 56' 32"

> Date: Sun, 15 Nov 2009 18:40:15 +0000
> From: <email address hidden>
> To: <email address hidden>
> Subject: [Stellarium-devel] [Bug 483200] [NEW] Visual Magnitude Values Are Inconsistent
>
> Public bug reported:
>
> The visual magnitude values are inconsistent with other accurately
> published sources such as the Astronomical and Nautical Almanacs. For
> instance, Jupiter should be mag. -2.3 during during the mid to last half of
> November and in Stellarium it's otherwise. Carts du Ceil seems to have it
> right.
>
> ** Affects: stellarium
> Importance: Undecided
> Status: New
>
> --
> Visual Magnitude Values Are Inconsistent
> https://bugs.launchpad.net/bugs/483200
> You received this bug notification because you are a member of
> Stellarium Developers, which is subscribed to Stellarium.
>
> Status in Stellarium: New
>
> Bug description:
> The visual magnitude values are inconsistent with other accurately
> published sources such as the Astronomical and Nautical Almanacs. For
> instance, Jupiter should be mag. -2.3 during during the mid to last half of
> November and in Stellarium it's otherwise. Carts du Ceil seems to have it
> right.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~stellarium-devel
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[Cyphedeous (cyphedeous)]

And it's not just Jupiter. All other celestial objects are inaccurate too. Something is wrong.

[Fabien Chéreau (xalioth)]

I just committed a partial fix involving ad-hoc formulas.
The magnitudes should be more correct when seen from earth.

[Cyphedeous (cyphedeous)]

My thanks!