Wednesday, October 04, 2017

photographed HD 79210 (Halifax)

Multi-star system HD 79210 aka STF 1321 was on my "view again" list so I sent the Burke-Gaffney Observatory to Ursa Major.

multi-star system HD 79210 in luminance

Luminance only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET, GIMP. North is up; east is left.

A and B are the equally bright stars oriented east and west with A on the left or east side.

C is the extremely dim star to the north-east.

D, brighter than C, forms a nice equilateral triangle, is to the south-west.

This object is included in the RASC coloured double stars list... I'm very curious how this will turn out in colour.

SkyTools says A and B are a binary system with an initial orbit calculated at 975 years.

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