NGC 7086 (Lund 993, Cr 437) Open Cluster in Cygnus

Located at: RA 21 hours 30 minutes 30 seconds, Dec +51 degrees 35 minutes 00 seconds

Size:* 9.0' (12') Magnitude: 8.4 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 & -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 440 minutes (44 x 10 minute subs), 07/17/18/19/2011; seeing 2.7-3.7 FWHM per CCDStack

Processing:

CCDStack 2.24.4110.20701, Photoshop 7.0

Location:

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

Notes:* "Star Clusters", by Brent Archinal and Steven Hynes, lists the size of this open cluster as 12 arc minutes ... possibly including the grouping of stars to the north of the 'main body' of the cluster.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7086
NGC 7086 = Cr 437 = Lund 993 = OCL-214
21 30 27  +51 36.0
V = 8.4;  Size 9

17.5": about 75 stars mag 10-14 in a 10' diameter.  Fairly rich and contains six 
brighter stars.  Most stars are located in a compact rich 5' group.  A second 
group is to the north.  A straight line of stars trails off to the SE with a mag 
9.5 star at the end of the string.  Includes several faint double stars.  There 
are two large dark voids to the NE.  This is a pretty cluster at low power using 
a 20mm Nagler.

- by Steve Gottlieb

The dark area to the Northeast (upper left) of the cluster is the most obvious "dark void", however, a CDS query lists only one Dark Nebulae (TGU H554), about 12 minutes almost due South.