Wednesday, September 22, 2010

GRS location

Michael (a RASC Toronto member) emailed me yesterday. Somewhere, somehow, he heard I was a fan of Stellarium...

He asked how to adjust the software so to get the Great Red Spot on Jupiter to be at the "proper" position. Normally, in other apps, like Starry Night or SkyTools, you adjust the Jovian System II longitude value.

I explained that for Stellarium, the GRS position can be tuned by editing the rot_rotation_offset value in the ssystem.ini text file. And that I had mine at 120, at present.

He reported it worked for him.

But he then asked where I got the number 120.


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