NGC 136 (Cr 4, Lund 18 ) Open Cluster in Cassiopeia

Located at: RA 00 hours 31 minutes 31 seconds, Dec +61 degrees 30 minutes 36 seconds

Size: 1.2' Magnitude: -- Class: II 1 p

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Red filter,  410 minutes (41 x 10 minute subs), 09/20/21/22/2017; seeing 2.3-4.4 FWHM per CCDStack

Processing: CCDStack 2.94.6355.18107, Photoshop CS5.1
Location:

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

Notes:

Imaged this small open cluster in the north around some cloudiness ...

According to  "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is listed as 1.5 arc minutes.

From the NGC / IC Project:

NGC 136 = Cr 4 = OCL-295 = Lund 18

00 31 31 +61 30 36

V = 11.6;  Size 1'

24" (1/4/14): ~10 faint stars are resolved in a small, circular patch ~1' diameter, over unresolved haze.  A small detached group to the southeast increases the total to 15 stars and the size to 2'.  Most of the resolved stars are mag 14-15.  Located ~6' NE of mag 8.5 SAO 11238.  Observed with a 4 day moon up, so not dark.

17.5" (8/16/93): 7-8 faint stars mag 14 resolved in very tight, compact group of 1.5' diameter, over background haze.  A few additional stars trail to the SE so there are about 10 stars in the group.  Located 6' NE of mag 8.3 SAO 11238.

13" (10/20/84): 5 or 6 very faint stars 13/14 over haze.  Appears similar to a small, faint gc with no strong concentration.

WH discovered NGC 136 = H VI-35 on 26 Nov 1788 (sweep 887) and described a "a small cluster of vF, exceedingly compressed stars about 1' diam.  The next step to an easily resolvable nebula."  He considered this cluster a miniature globular.