NGC 7380 (Lund 1022, Cr 452) / Sh2-142 (LBN 511) Open Cluster / Bright Nebula in Cepheus

Located at: RA 22 hours 47 minutes 00 seconds, Dec +58 degrees 06 minutes 00 seconds

Size: 12' (20') / 35' x 18.5' Magnitude: 7.2 / -- Class: III 2 m n / Emission (Sharpless) 3 1 1

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -10c & -15c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 910 minutes (91 x 10 minute subs), 09/5/6/7/8/9/2011; seeing 2.5-4.6 FWHM per CCDStack

Processing:

CCDStack 2.24.4110.20701, Photoshop CS 5.1

Location:

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

Notes: Shot this object with lots of moon and a heat wave ... resulting in poor seeing on half of the imaging run ...

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of the open cluster is 20 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7380
NGC 7380 = Sh 2-142 = LBN 511 = Cr 452
22 47 21 +58 07.9
V = 7.2;  Size 25x30

17.5" (10/30/99): at 100x with an OIII and UHC filter, a bright triangular-
shaped nebulosity (Sh2-142), 8'-10' diameter, is superimposed on a rich grouping 
of stars (N7380) within a rich milky way field.  The brightest mag 8.5 star 
(very unequal double) is at the west vertex. Also a wide strip of nebulosity is 
attached near the SE vertex and extends to the SW.  A dark band appears to 
separate this strip from the triangular patch. The surrounding region appears 
weakly nebulous and the "edge" can be traced with some certainty a ways to the 
north.

17.5" (7/31/92): at 100x, about 40 stars in a 10' diameter.  The brighter stars 
form a "V" or chevron pattern.  The brightest star is at the W tip of the "V" 
and is an unequal double mag 8.6/13.  The cluster appears to be encased in 
nebulosity especially from the mag 8.6 star to the star at the E tip of the "V".  
Using an OIII filter the nebulosity is quite prominent with some structure and 
encases the entire cluster.  A lane of nebulosity oriented SW-NE extends beyond 
the cluster from the star at the E end of the "V" and nebulosity also extends W 
of the mag 8.6 star.  The double star O?480 = 7.6/8.6 at 30" is in the field to 
the W.

13" (10/26/80): ~30-35 stars in a triangular outline, 10'-12' in diameter but 
not rich.

- by Steve Gottlieb