IC 1311 (Lund 928, Cr 414) and B 342 (LDN 885) Open Cluster and Dark Nebula in Cygnus
Center of field at approximately: RA 20 hours 10 minutes 05 seconds, Dec +41 degrees 09 minutes 56 seconds
Size: 9.0' (5.0) and 4.0'; Magnitude: 13.1 and --; Class: I 1 r n and (3 Ir?)
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
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| Camera: |
ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56 |
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| Image: |
Lumicon Deep Sky filter, 240 minutes (24 x 10 minute subs), 09/24/25/2007 |
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| Processing: |
CCDStack 1.3, Photoshop 7.0 |
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| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
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| Notes: | This field in Cygnus is about 2.5 degrees NNW from Sadar (Gamma
Cygni), the 'heart of the cross (of the swan)'. Central Cygnus is laced
with nebulosity, a small part seen to the East (left) of IC 1311.
Several patches of 'darkness' are named by E. E. Bernard in this area,
with B 342 seen just 14 minutes to the West (right) of IC 1311. Also,
forming an equilateral triangle (to the North) with IC 1311 and B 342, is the Open
Cluster Dolidze 2 (10',
mag --, Cl: IV 1 p n), at the
top edge of the field. According to "Star
Clusters", by Brent Archinal and Steven Hynes, the open cluster
IC 1311 is 5.0 arc minutes in size. This description from the on-line Edward Emerson Barnard "A Photographic Atlas of Selected Regions of The Milky Way":
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Small,
dark marking, 4´ E and W