B 103 (LDN 497) Dark Nebula in Scutum

Located at: RA 18 hours 39 minutes 21 seconds, Dec -06 degrees 37 minutes 48 seconds

Size: 8.0' x 3.0' Magnitude: -- Class: 6 Ir

North is up

West to the right


8" f5 Newtonian reflector


 ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56


Lumicon Red filter, 530 minutes (53 x 10 minute subs), 09/6/9/10/2010; 2.6-3.6 FWHM per CCDStack


CCDStack 2.11.3874.21660, Photoshop 7.0


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


Another of the many Dark Nebulae clustering around the edge of the great Scutum Star Cloud. B 103 is on the western edge; also see B 104, B 110, B 113 and B127/129/130.

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

α(2000)18h 39m 26s, δ(2000) -6 41
Galactic Coordinates 26, -0
 Irregular, diam. 4, one small star in it. Apparently a real object, the south of several dark markings covering a space 45' in diameter. They form a notched outline to the northwest side of the large star cloud in Scutum.