NGC 133 (Cr 3) / NGC 146 (Lund 21) / King 14 (Lund 19) Open Clusters in Cassiopeia

Center of field at approximately: RA 00 hours 32 minutes 01 seconds, Dec +63 degrees 16 minutes 51 seconds

Size: 7.0' (3.0') / 6.0' (5.0') / 7.0' Magnitude: 9.4 / 9.1 / 8.5 Class: IV 1 p / II 2 p / III 1 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 Red filter, 300 minutes (30 x 10 minute subs), 10/7/8/2008; seeing 2.3-2.9 FWHM per CCDStack

Processing:

CCDStack 1.3.7, Photoshop 7.0

Location:

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

Notes: All three of these clusters are classified as "poor" (less than 50 stars).

"Star Clusters", by Brent Archinal and Steven Hynes, lists the size of NGC 133 as 3.0 arc minutes, and the size of NGC 146 as 5.0 arc minutes.

NGC 133 is also "not well detached from surrounding star field". It is more or less centered on the five stars forming a SSE line at a position forming an equilateral triangle with the other two more noticeable clusters ... see this map

From the NGC / IC Project:

Contemporary Visual Observation(s) ...

NGC 0133 = Cr 3 = OCL-296 = Lund 17
00 31 17 +63 21.2
Size 7

17.5": about 15 stars including 5 brighter stars forming a "Y" asterism and 10 
faint stars.  One of the brightest stars is a very close double star (9.7/11.3 
at 6") and a curving lane of very faint stars passes through this double star, 
not rich.  This is the poorest of three clusters just N of Kappa Cassiopeia.

8": group of 8 stars in "Y" asterism, in field with open cluster N146 and King 
14.

- by Steve Gottlieb
NGC 0146 = Cr 5 = OCL-299 = Lund 21
00 33.1 +63 18
V = 9.1;  Size 7

17.5": about 30 stars in a fairly large group about 10' diameter.  Includes a 
close mag 10 pair at 7" separation, 10 stars mag 12-13 and 20 stars mag 14-15.  
Third of three open clusters in low power field with King 14 10' SW and N133 10' 
WNW.

8": includes a few mag 10 stars, many mag 12 stars and fainter stars over haze.  
Located 22' N of a mag 4 star.  N133 is in the field to the WNW and King 14 is 
close SW.

- by Steve Gottlieb