NGC 2158 (Lund 205, Cr 81) Open Cluster in Gemini
Located at: RA 06 hours 07 minutes 26 seconds, Dec +24 degrees 05 minutes 48 seconds
Size: 5.0'; Magnitude: 8.6; Class: II 2 r
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, 420 minutes (42 x 10 minute subs), 01/14/15/2009; seeing 2.6-3.6 FWHM per CCDStack |
| Processing: |
CCDStack 1.4.1, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes: |
This image replaces an unfiltered 125 minute sequence from 01/19/2006. This rich little open cluster forms a close pair with M 35 (centered about 26 minutes NNE). From the NGC / IC Project: Contemporary Visual Observation(s) for NGC 2158 NGC 2158 = Mel 40 = Cr 81 06 07 26 +24 05.8 V = 8.6; Size 5 17.5": 30-35 stars resolved, unusually rich, compact, about 5' diameter. The appearance is similar to a resolved globular cluster. Located 30' SW of M35. 13": ~15-20 stars, mottled clump near SE edge. 8": few stars resolved over haze. Discovered by WH (VI 17). Listed as a globular in the RNGC. This is an old open cluster (> 1 billion years old). - by Steve Gottlieb |
