Astrophotography by Anthony Ayiomamitis

Barnard's Dark Nebulae Image Gallery

Barnard's initial catalog of dark nebulae, first published in 1919, described 182 entries and was superceded by a 1927 follow-up publication which was expanded to include 349 entries. These "dark nebulae" are believed to be the result of molecular clouds of dust and gas which are present in our line of sight and which absorb the starlight originating behind them, thus providing the earth-based observer working in the visible spectrum the illusion of a black "void" (these dark nebulae are NOT associated with dark matter!). Some of the best-known examples of these "absorption nebulae" include B33 (Horsehead Nebula), B68 (Molecular Cloud 68), B72 ("S" or Snake Nebula) and B142-143 ("E" Nebula).

Note: Dark nebula B133 is one of various notable such nebulae in Aquila. It lies in the southern portion of the constellation and near the border with Scutum. Other Barnard dark nebulae within the immediate vicinity include B127, B129, B130 and B134 as well as the bright carbon star V Aql. This nebula is elongated and generally runs northeast to southwest measuring approximately 10' by 3' and with the southern half being much darker and denser than the northern half. As noted by Barnard, this nebula has a general cometary form and convex west side.

Please click on the image below to display in larger format (1200 x 900).

Image Details
B133 - Dark Nebula in Aquila
Imaging Details
Barnard Dark Obj:
133

Common Name(s):
N/A

Other Designations:
LDN 531

Object Type:
Dark Nebula

Object Classif:
6 Co G

Constellation:
Aquila

RA / Dec:
19h 06m 07s /
-06 50' 24"


Galactic Lon/Lat:
29 / -6

Object Size:
10' x 3'

Barnard Plate(s):
37, 39
Date:
Jul 27-28, 2009
22:40 - 01:05 UT+3


Location:
Athens, Greece

Equipment:
AP 160 f/7.5 StarFire EDF
AP 1200GTO GEM
SBIG ST-10XME
SBIG CFW10
AstroDon TruBal CRGB


Integrations:
Lum :  042 min (14 x 3 min)
Red :  030 min (05 x 6 min)
Green :  030 min (05 x 6 min)
Blue :  030 min (05 x 6 min)
Binning :  1x1 (Lum),  1x1 (RGB)

Image Scale:
1.17" per pixel

Temperatures:
Ambient : + 25.4 C
CCD Chip : - 12.5 C

Software:
CCDSoft V5.00.188
CCDStack V1.5.2.1
Photoshop CS2