NGC 129 (Lund 15, Cr 2) Open Cluster in Cassiopeia

Located at: RA 00 hours 29 minutes 54 seconds, Dec +60 degrees 13 minutes 00 seconds

Size: 21' (12') Magnitude: 6.5 Class: III 2 m

North is up

West to the right


 8" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56


Lumicon Deep Sky filter, 200 minutes (22 x 10 minute subs), 10/20/2007


CCDStack 1.3, Photoshop 7.0


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes: This image was taken the night (Saturday night into Sunday morning) the Southern California wildfires started ... the seeing was bad (maybe 4 or 5 arc seconds) as the Santa Ana winds were just starting. The mount was having a bad time tracking in the poor seeing, so I took 'extra' images .... so CCDStack would have enough data to reconstruct a reasonable image.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 12 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 129
NGC 0129 = Cr 2 = OCL-294 = Lund 15
00 29 58.5 +60 12 43
V = 6.5;  Size 21

17.5": 60 stars mag 10-15 in the 8'x6' central region of the cluster formed by 
an isosceles triangle with vertex at the south end.  Each side of this triangle 
includes a mag 10 star and most cluster members are contained within triangle.  
No real boundaries and many mag 15 stars are at the edges of this triangle.  Mag 
6.0 SAO 21457 lies 10' S.

8": ring-shaped open cluster with stars mag 9-13.  There is a line of stars to 
the N on the E edge.

- by Steve Gottlieb