NGC 7226 (Cr 446, Lund 1007) Open Cluster in Cepheus

Located at: RA 22 hours 10 minutes 25 seconds, Dec +55 degrees 23 minutes 49 seconds

Size: 1.8' (2.0') Magnitude: 9.6 Class: I 2 m

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Red filter, 540 minutes (54 x 10 minute subs), 08/24/25/26/2017; seeing 2.3-4.1 FWHM per CCDStack

Processing: CCDStack 2.94.6355.18107, Photoshop CS5.1
Location:

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

Notes:

First image after the eclipse ...

According to  "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is listed as 2.0 arc minutes.

From the NGC / IC Project:

NGC 7226 = Cr 446 = Lund 1007 = OCL-226

22 10 26.9 +55 23 54

V = 9.6;  Size 2'

 

18" (8/17/04): at 225x, this is a small, faint group with 25-30 stars resolved in a 2'-2.5' region.  The star at the NE edge is a nice, mag 12/13 double.  The remaining stars are generally 14th-15th magnitude and some pop in and out of view.

 

17.5" (11/2/91): 15 stars resolved at 220x within a compact 2' diameter.  The brightest mag 11 star is at the WNW edge and a close double star mag 12/13 at 11" is at the NE edge.  The remaining dozen very faint stars are 14th and 15th mag and located along the south side.  Situated in a rich star field over unresolved background haze.

 

Edward Holden discovered NGC 7226 on 20 Jun 1881 with the 15.6" Clark refractor at the Washburn Observatory and described a "pB nebula connected with a small cluster of stars which radiate in two streams from the f[ollowing] to p[receding] side. Diam of Neb 5', of Cl. 15'.  North-preceding in p[osition angle] 315 is a small knot which may be nebulous."  His position is just off the east side of this small cluster.