NGC 7245

NGC 7245 (Lund 1010, Cr 449) and King 9 (Lund 1011) Open Clusters in Lacerta

Center of field at approximately: RA 22 hours 15 minutes 36 seconds, Dec +54 degrees 21 minutes 29 seconds

Size: 5.0' and 2.5' (3.0'); Magnitude: 9.2 and --; Class: II 2 m and I 1 m

North is up

West to the right

Telescope:	8" f5 Newtonian reflector
Camera:	ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56
Image:	Lumicon Red filter, 500 minutes (50 x 10 minute subs), 09/6/7/8/2008; seeing 2.9-3.6 FWHM per CCDStack
Processing:	CCDStack 1.3.7, Photoshop 7.0
Location:	Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)
Notes:	These two clusters are less than 5 minutes apart ... NGC 7245 is the Western most of the two (just to the lower right of center), and King 9 just to the Northeast (upper left of center) ... and both are hard to pick out of this rich Milky Way field. According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of open cluster King 9 is 3.0 arc minutes. From the NGC / IC Project: Contemporary Visual Observation(s) for NGC 7245 NGC 7245 = Cr 449 = Mel 241 = Lund 1010 22 15 16 +54 20.2 V = 9.2; Size 5 17.5": about two dozen stars in a 2.5' diameter bordered by a mag 11 star on the W edge, a mag 10 star on the SSE edge and a mag 9 star (SAO 34240) off the NE side. A small 1' diameter core is richer. A large dust lane appears to cut through the 20' field SW-NE and passes the east side of cluster. At low power other dark patches are evident. Open cluster IC 1442 is in the low power field 20' SE. 13": about 20 fainter stars mostly in a string. Other rich enhancements are near in this milky way field. 8": 15 faint stars elongated N-S with a double star at the N edge. Includes three brighter stars mag 8-10 around the edges but the rest of the stars are mag 13 or fainter. - by Steve Gottlieb Historical Research Notes / Correction for NGC 7245 NGC 7245. Pulling this cluster up on the DSS, I wondered at first if the somewhat richer, but more distant cluster at 22 13 37.4, +54 09 38 (King 9) might have been seen by one of the Herschels. However, reducing both their positions to B1950.0 makes it clear that they both saw the same, nearer, poorer cluster: both positions are within an arcminute of the center as I see it on the DSS. - Dr. Harold G. Corwin, Jr.