NGC 2309 (Cr 122) Open Cluster in Monoceros
Located at: RA 06 hours 56 minutes 04 seconds, Dec -07 degrees 10 minutes 30 seconds
Size: 3.0' (~4.0'); Magnitude: 10.5; Class: I 2 m
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Red filter, 320 minutes (32 x 10 minute subs), 03/8/10/2009; seeing 2.2-2.7 FWHM per CCDStack |
| Processing: |
CCDStack 1.5.2.1, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes: |
From the NGC / IC Project: Contemporary Visual Observation(s) for NGC 2309 NGC 2309 = Cr 122 = Mel 56 = OCL-557 06 56 04 -07 10.5 Size 3 17.5": three dozen stars mag 11-15, fairly rich, compact, 4' diameter. Most stars located within two streams. The brighter stars in the southern stream are oriented E-W. A fainter star lane to N is oriented NW-SE. At the NW end it hooks NE to mag 9 SAO 133914 about 4' N of the cluster's center. Includes several close pairs with two pairs near the center and a double star 11/14 at 7" separation at the W end. - by Steve Gottlieb |