B 159 (LDN 973) Dark Nebula in Cygnus

Located at: RA 21 hours 38 minutes 24 seconds, Dec +43 degrees 14 minutes 00 seconds

Size: 25' Magnitude: -- Class: (4 Ir?)

North is up

West to the right


 8" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -10c & -15c, camera control MaxIm DL 4.56


Lumicon Red filter, 820 minutes  (82 x 10 minute subs), 08/23/24/25/26/27/28/2009; seeing 2.7-4.9 FWHM per CCDStack


CCDStack, Photoshop 7.0


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

Notes: Saw this field imaged online by Antonia F Sanchez ...

The CDS lists the position of B 159 as 21h 37m 29.9s, +43d 13m 59s.

This description from the on-line Edward Emerson Barnard "A Photographic Atlas of Selects Regions of The Milky Way":

Dark Object
α (2000)
21h 38m 22s
δ (2000)
+43 14
Galactic Coordinates
90, -7
Irregular partially vacant region, diam 25. This is the center of an irregular, partially vacant region 25' in diameter. It is suggestive of the presence of a dark or faint nebulosity, as there are several small darker spots in it. It lies 40' northwest of Nova Cygni of 1876, and involves the stars BD+424177 (5.2 mag), +424172 (8.4 mag), and 424164 (7.7 mag). It is somewhat extended east and west. A very long exposure on this region would doubtless be interesting..