NGC 2355 (Lund 311, Cr 133) Open Cluster in Gemini

Located at: RA 07 hours 17 minutes 00 seconds, Dec +13 degrees 45 minutes 00 seconds

Size: 9.0' (8.0') Magnitude: 9.7 Class: II 2 m

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:

Red (Hoya 25A) filter, 100 minutes (10 x 10 minute subs), 02/17/2007

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 8.0 arc minutes. See the 14.5" image.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 2355

NGC 2355 = Cr 133 = Mel 63 = OCL-496 = N2356?
07 16 59 +13 45.0
Size 9

13.1": about 50 stars down to mag 14 in a 8'x5' group elongated N-S including a 
mag 10 star at the SE edge.  Rich, fairly compact, a number of stars are 
arranged in lanes.  Located about 7' SW of mag 8.0 SAO 95722.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 2355
NGC 2356 is most likely NGC 2355 with a 10 arcmin error in declination.  There
is no other group of stars in the area that fits WH's description "A pretty
rich and compressed cluster of stars" as well.  JH did not see NGC 2356, but
found NGC 2355 easily.  Note, too, that WH's position for N2355 is about 1m
40s too far west; Dreyer discusses the circumstances of WH's observation of
N2355 a bit more in his 1912 edition of WH's papers. - Dr. Harold G. Corwin, Jr.