Thursday, March 21, 2019

received 7 Leo data (Halifax)

BGO said queue was empty (back on 19 Mar 2019 around 22:42 EDT) so I looked for and submitted a target quickly. I chose a Sissy Haas double, one with curious colours. She says 7 Leonis is a deep blue star and blue-green partner. I aimed at nearby GSC 00827 00796.

double-star 7 Leo in luminance

Luminance only, ½ seconds sub, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.

7 Leo proper is the bright unequal pair to the south. Will be interesting to see this in full colour.

There's a doublet to the north. SkyTools 3 Pro does not show this as a pair; rather the single stars SAO 98667 and SAO 98665.

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A little update as the data in ST3P is a bit old, dated 2003. The latest info in the WDS for 09359+1423 H 5 58 is from 2014.

PA 90
sep 41
mags 6.31 and 9.39.

That angle doesn't look right. I think it's less than 90.

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Searched the WDS by coordinates. Found an entry for the equal pair to the north.

09362+1436 ARN  72
first report 1893
last report 2015
PA 111
last sep 81.7
mags 8.82 and 9.09
precise 093613.29+143547.8.

That's a good match for the ST3P info.

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