NGC 1545 (Lund 131, Cr 49) Open Cluster in Perseus

Located at: RA 04 hours 20 minutes 57 seconds, Dec +50 degrees 15 minutes 18 seconds

Size: 18' (12') Magnitude: 6.2 Class: IV 2 p

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Red (Hoya 25A) filter, 100 minutes (10 x 10 minute subs), 11/12/2006

Processing:

CCDStack 1.1, Photoshop 7.0

Location:

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

Notes: 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 1545

NGC 1545 = Cr 49 = OCL-399 = Lund 131
04 20 56 +50 15.3
V = 6.2;  Size 18

17.5": about 50 stars scattered evenly over a 20' field with no dense areas or 
central concentration.  A pretty pair of mag 7/8 stars are near the center (S445 
= 7.3/8.2 at 72") with a blue mag 9 star to the W (SAO 24549) forming an 
isosceles triangle.  A number of mag 11/12 stars are arranged in a curving 
stream oriented SW-NE which passes through the bright pair.  At the N end is a 
pretty colored pair ?519 = 7.9/9.4 at 18".  Off the E side is a small circular 
group of five faint stars and one brighter star in a clump.

8": about two dozen stars in the cluster.  The three brightest stars are mag 
7.5-8.5.  Includes chains of faint stars with double star ?519 = 7.9/9.4 at 18" 
at the N edge.

- by Steve Gottlieb