Monday, November 14, 2016

shot HD 57102 (Halifax)

The BGO robot imaged HD 57102 aka 19 Lyn for me. Struve labelled it 1062. A multi-star system.

multi-star system HD 57102 in luminance

Luminance only, 3 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; left is east.

On my View Again list to chase down the C companion. Easily spotted in this image although it is extremely faint. It is to the west-north-west of the bright and tight AB pair, almost inline.

SkyTools says the C star is magnitude 10 to 11 but it seems dimmer. The star beyond is GSC 03785-0554 which the software notes as 14 (but is poor quality). The bright pair north of D, with GSC 03785-0041 and GSC 03785-0653, are in the mag 13 range and the C star is similar to those.

I don't remember the telescope I was using on first viewing 19 Lyncis but perhaps C was below the light grasp.

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According to the Washington Double Star catalogue, C is magnitude 12.8.

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Discovered that in my SkyTools software, I had never recorded this in the Multiple Stars life list. And it never made it to the View Again. Up to date now!

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