Comment 2 for bug 1650757

Okey let's try that on Thunderbird!

m = m_0 + 5*log_10 (r*Δ)

where:

r = distance sun to planet (in AE)

Δ = distance earth to planet (in AE)

m_0 = -0,42^mag + 3,8^mag *(i/100°)-2,73^mag *(i/100°)^2 + 2^mag *(i/100°)³

where:

i = phase angle

This is for Mercury.

I hope you can use it. If you use this you get +3,0 magnitudo on 1st of
january 2017 (0h UTC) instead of 3,85 mag. (Stellarium). As far as i
know this method is based on VSOP87.

Kind regards,

Christian Bucher

Am 17.12.2016 um 14:59 schrieb Alexander Wolf:
> How exactly you are measured photometry of Mercury? Which algorithm of
> prediction of brightness for major planets of Solar system in Stellarium
> you used?
>
> ** Changed in: stellarium
> Status: New => Incomplete
>