Sunday, January 07, 2018

imaged 16 Eri (Halifax)

Loaded a double-star job into the BGO queue for the bright Moon phase. Aimed at GSC 05878 0248 and the robot imaged 16 Eridani also known as τ4 (tau) Eri.

multi-star 16 Eri in luminance

Luminance only, 2 seconds subexposures, 20 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.

Neat system with 6 stars.

B is not visible, lost in the glare of the brilliant primary. Doable at 6 seconds of arc. Looks like I'd need to shoot much faster, a half second perhaps, to split them.

The C companion is to the south-east or down and left of the main star. It is the brightest of all the members.

D, E, and F are on the west running from north to south. D and E are equally bright. F is brighter than D and E but less so that C.

This is an old multi-star system. Well, old in terms of human observations. Reports date back to 1887.


Wikipedia link: Tau4 Eridani.

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