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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LRGB data combined on 11 May '18.
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Wikipedia: 19 Lyncis.
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