NGC 381 (Lund 38, Cr 10) Open Cluster in Cassiopeia

Located at: RA 01 hours 08 minutes 18 seconds, Dec +61 degrees 35 minutes 00 seconds

Size: 6.0' (7.0') Magnitude: 9.3 Class: III 1 m

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Red filter, 500 minutes (50 x 10 minute subs), 09/18/19/2015; seeing 2.5-3.4 per CCDStack

Processing:

CCDStack 2.90.5589.16047, Photoshop CS5.1

Location:

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

Notes: According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 7.0 arc minutes. See the 8" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 381

NGC 0381 = Cr 10 = OCL-317 = Lund 38
01 08.3 +61 35
Size 6

17.5" (8/16/93): 40 stars mag 11-15 in loose 6' diameter, stands out best at 
100x.  The brightest mag 10.8 star is part of a triple along the north side.  
Fairly uniform in mag 12/13 stars with a scattering of faint stars, fairly even 
distribution with no rich regions.  Not recognizable as a cluster at 220x.

17.5" (11/2/91): about three dozen stars in 6' diameter, fairly faint, roughly a 
circular group.  Consists mostly of mag 12/13 stars.  Includes a triple star 
(10.8/12.5/13 at 8"/~3") and two mag 11 stars on the W side.  Several stars are 
arranged in strings.  Relatively few stars in center.  A line of mag 10 stars 
trail off to the N edge of field and the mag 10 star at the end of the string 
11' N is a close double star.

8": ~30 stars in a circular group, bright curving string to the north.  A mag 8 
star is 10' E.

- by Steve Gottlieb