Stephenson 1 (Lund 870, OCL-137) Open Cluster in Lyra
Located at: RA 18 hours 53 minutes 36 seconds, Dec +36 degrees 55 minutes 00 seconds
Size: 20' (40'), Magnitude: 3.8; Class: IV 3 p
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Deep Sky filter, 100 minutes (10 x 10 minute subs), 07/25/2007 |
| Processing: |
CCDStack 1.2, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes: | This field was a real problem to process ... This nondescript
cluster is also known as the Delta Lyrae cluster, and the very bright
star is Delta 2 (12 Lyrae), at 4.3 (visual) magnitude. In my on going
attempts to take advantage of every 'clear' night, I tried this object
with a very hazy sky (about magnitude 4 skies visible in the area of
Vega), and the 11 day old moon lighting up the sky to the South. The
area around Delta was illuminated beyond my present ability to adequately
process...
According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 40 arc minutes (!). Comments from "Star Clusters" are; "Archinal: Delta Lyrae cluster, discovered by Gordon Grant. Delta 2 is center and brightest star (V=4.30v, M4II). Aliases: Del Lyr cl; Lund 870, OCL 137.0; C1851+368" |