[Peyton-observing] Observe comet Siding Spring passing Mars?

[Gaspar Bakos]

Hi,

I think this observation will be quite challenging; a 10th magnitude
diffuse object 6 arcminutes from the 1st magnitude Mars on a dusk sky, and
all behind the Math tower ...

I think it will set behind the Math tower shortly after 7pm,  so if you try
at 7pm sharp, you may see Mars -- and who knows, may even spot the comet
(esp. if it brightens by a lot). Good luck!

Best wishes,
Gaspar
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