Astrophotography by Anthony Ayiomamitis

Sharpless Catalog Nebula Image Gallery

The Sharpless catalog of emission nebulae contains 313 entries representing H-II emission nebulae with a declination of -27 degrees or above. Compiled and published by American astronomer Stewart Sharpless (USNO) in 1959 (see here), the catalog contains a wide variety of star formation regions across the Milky Way including various Herbig-Haro and Wolf-Rayet objects as well as a number of well-known emission nebulae such as the Trifid (M20), the Eagle (M16), Orion (M42), Lagoon (M8), the Crescent (NGC 6888), and the Crab (M1) nebula.

Note: The large and dim emission nebula Sh2-96 in Cygnus represents a portion of a collection of filaments which are associated with supernova remnant G65.2+05.7 and which also includes Sh2-91 and Sh2-94 to the south. This supernova remnant was discovered by Gull et al in 1977 during the course of an emission line survey involving the galactic plane. It is estimated to span 230 light-years in diameter and to lie at a distance of approximately 2935 light-years away. Kinematic studies by Rosado reveal an expansion velocity of 90 km/sec, thus suggesting the remnant to be approximately 20,000 years old and thereby making it one of the oldest supernova remnants known. The complete SNR is estimated to cover an area of 4 by 3.3 (see Shelton et al) with Sh2-96 representing the northermost section of the shell lying approximately 2.5 north of Albireo. In contrast, Sh2-91 is the southermost filament of the supernova remnant, representing the southern wall of the shell, and measures 120' x 20'. Similarly, Sh2-94 lying between Sh2-96 to the north and Sh2-91 to the south represents the western wall and is associated with an apparent diameter of 25' x 10'. For a deep optical survey of this supernova remnant, see Mavromatakis et al (2002).

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

Image Details
Sh2-96 - Supernova Remnant in Cygnus
Imaging Details
Sharpless Number:
2-96

Common Name(s):
N/A

Other Designations:
LBN 150

Object Type:
Bright Nebula

Object Classif:
E Ir AF

Constellation:
Cygnus

RA / Dec:
19h 28m 42s /
32 41' 31"


Distance:
2,935 light-yrs

Object Size:
25' x 20'

Magnitude:
5.0


Date:
Aug 27-28, 2011
22:00 - 02:35 UT+3


Location:
Athens, Greece

Equipment:
AP 305/f3.8 Riccardi-Honders
AP 1200GTO GEM
SBIG ST-10XME
SBIG CFW10
Baader H-a 7nm
SBIG LRGB filters


Integrations:
H-a :  150 min (15 x 10 min)
Lum :  015 min (15 x 01 min)
Red :  030 min (10 x 03 min)
Green :  030 min (10 x 03 min)
Blue :  030 min (10 x 03 min)
Binning :  1x1 (Lum, H-a),
 1x1 (RGB)

Image Scale:
1.25" per pixel

Temperatures:
Ambient : + 24.0 C
CCD Chip : - 12.5 C

Software:
CCDSoft V5.00.201
CCDStack V1.6.0.5
eXcalibrator V1.0.3.0
Aladin V6
Photoshop CS2