Stellarium / stellarium

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows and macOS. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

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Sky brightness due to Moon light #351

Open alex-w opened 6 years ago

alex-w commented 6 years ago

_Original report by Fred76: https://bugs.launchpad.net/stellarium/+bug/1108475

Hi!

I always was quite scrambled wich the sky brightness rendered by Stellarium due to the Moon light.

I found a paper here that formalizes the calculation of the sky brightness, anywhere in the sky, depending on the Moon's phase angle, Moon's elevation, distance between a point in sky and the Moon.

It may be worth considering this paper in Stellarium.

See : http://articles.adsabs.harvard.edu//full/1991PASP..103.1033K/0001038.000.html

Best regards

Fred

gzotti commented 6 years ago

The sky brightness model of course already also includes lunar brightening. In a possible future round of re-working all of sky and atmosphere, also this paper can be considered.

gzotti commented 6 years ago

397 is very close but concerning the color. I merge these two here, but repeat the text to have the paper here.

Original report: https://bugs.launchpad.net/stellarium/+bug/1641756

From the forum, https://sourceforge.net/p/stellarium/discussion/278769/thread/8a9bc037/?limit=25#dc2f

For some reason, the Moon halo is increasingly reddened when it rises higher. This is obvious nonsense. Apparently this behavior was introduced in 0.11 or 0.12 series.