Astrophotography by Anthony Ayiomamitis

Deep Sky Object Image Gallery

Open star clusters are widely distributed in our galaxy and represent a loose collection of stars which number from a few dozen to a few hundred stars and are weakly-held gravitationally. Perhaps the three most famous such open clusters are the Pleiades (M45) in Taurus, the Beehive (M44) in Cancer and the double cluster in Perseus. They are all characterized with a handful of hot and white prominent stars and nebular material surrounding these stars.

Note: Although some confusion existed initially as to whether NGC 6882 and NGC 6885 are distinct and separate clusters, it has now been determined that the member stars really represent one open cluster, namely NGC 6885, with NGC 6882 now discarded as a catalog entry. NGC 6885 lies in Vulpecula, near the Cygnus border, and is surrounded by M27, the nebula IC 4964 and the open cluster NGC 6940. The cluster is dominated by a bright central star (20 Vul/SAO 88339, mag 5.91) and lies approximately 1,950 light-years away. The cluster's age has been estimated to be 1.45 billion years-old, thus making it a relatively older cluster. A search of the academic literature reveals findings involving pulsating and eclipsing binary variables in the immediate vicinity of NGC 6885 (see Hintz and Rose, 2005). NGC 6885 was discovered by William Herschel in 1784 and who is also the source of the confusion related to NGC 6882 which he also catalogued (presumably while looking at the same cluster but without realizing it).

Please click on the image below to display in higher resolution (1200 x 900)

Image Details
NGC 6885 - Open Cluster in Vulpecula
Imaging Details
NGC Number:
6885

Common Name(s):
N/A

Other Designations:
Cr 417, OCL 132, C37

Object Type:
Open Cluster

Object Classif:
III 2 m

Constellation:
Vulpecula

RA / Dec:
20h 12m 00s /
26 28' 44"


Distance:
1,947 light-yrs

Object Size:
20'

Magnitude:
8.1
Date:
Aug 15-16, 2012
20:00 - 00:20 UT+3


Location:
Athens, Greece

Equipment:
AP 305/f3.8 Riccardi-Honders
AP 1200GTO GEM
SBIG ST-10XME
SBIG CFW10
SBIG LRGB filters


Integrations:
Lum :  030 min (30 x 1 min)
Red :  030 min (10 x 3 min)
Green :  030 min (10 x 3 min)
Blue :  030 min (10 x 3 min)
Binning :  1x1 (Lum),  1x1 (RGB)

Image Scale:
1.21" per pixel

Temperatures:
Ambient : + 25.0 C
CCD Chip : - 10.0 C

Software:
CCDSoft V5.00.201
CCDStack V1.6.0.5
eXcalibrator V1.0.3.0
Aladin V6
Photoshop CS5