Tuesday, September 12, 2017

shot 77 Psc (Halifax)

I ordered BGO to shoot 77 Piscium, aka Σ90, a multi-star system. I centred on GSC 00022-0669. From a "beautiful" list in SkyTools, based on an observing list from the Coldfield Observatory,

multi-star system 77 Psc in luminance

Luminance only, 4 seconds subexposures, 20 stacked shots. FITS Liberator, Paint. North is up; east is left.

77 Psc is a 5-star system according to SkyTools.

The B companion is the bright star to the east of the primary. Nearly the same magnitude.

C is the dim partner to the west at 5 times the AB separation.

There is a very faint star to the north-west at the same distance as B. This is the P star.

Q is north of A, about 3x the AB sep. Same intensity as P.

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