Luminance only, 1 second sub, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
This double star target was chosen from an old "neglected" list at the WDS. I initially used the location, 09312+2446, in the ID to try to find the object. There was nothing at the location in SkyTools 3 Pro. But ST3P showed a conspicuous pair due south at +24 36! Proper motion? Looked like an entry error in the coordinates to me. Also my software showed the pair data was dated 1915. Over 100 years old. I selected the star GSC 01959-0225, kind of in the middle, for the Burke-Gaffney robot.
The image clearly shows the pair with the brighter element to the west. They are nearly in a perfect east-west orientation. There's a neat big funnel shape...
I plate-solved the (rotated) FITS image with astrometry.net. The image centre is at 09h 31m 11.498s and +24° 41' 53.307". The image size 23.9 x 23.9 arcmin with a radius of 0.282 deg. The pixel scale is 0.934 arcsec/pixel. The image is rotated from the equatorial coordinate system very slightly: up is 0.298 degrees E of N.
As I examine the current "main" Washington Double Star 06-11 list now, I see there have been 9 observations for HJ 465 with the most recent in 2015. I don't see any notes on the database entry. Most importantly, the WDS shows the precise coordinates as 093112.74+243605.5 so all appears good now...
No comments:
Post a Comment