B 334 (LDN 701) / B 336 (LDN 702) / B 337 (LDN 705) Dark Nebulae in Aquila

 Center of field at approximately: RA 19 hours 36 minutes 21 seconds, Dec +12 degrees 19 minutes 42 seconds

Size: 3.4' x 2.2' / 2.0' x 1.0'  / 3.0' (~40' = LDN 701, 702, 705) Magnitude: all three -- Class: all three -- (4 Ir = LDN 701, 702, 705)

North is up

West to the right

Telescope:

8" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Deep Sky filter, 240 minutes (24 x 10 minute subs), 09/2/7/2007

Processing:

CCDStack 1.3, Photoshop 7.0

Location:

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

Notes: These three little Barnard dark nebulae are not much to look at in this dense Aquila Milky Way star field. They also have no individual 'Class' designations ... The dark nebula designations LDN 701, LDN 702 and LDN 705 have a combined cataloged size of about 40' x 5.0'. The CDS list the center of B 334 at 19h 34m 54s, 12h 16m 59s ... about 7 minutes SSW of my software's (Megastar v5.0.12) position. The Megastar position is centered at the "Small, dark marking, diam. 3' " position. This puts the 'center' of B 334 at the west edge of my field ... The drawn outline of B 334 agrees with the CDS position.

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

334
α(2000)19h 35m 06s, δ(2000) +12 19
Galactic Coordinates 49, -4
 Small, dark marking, diam. 3. An extension from this small spot curves to the southwest. The star BD+113897 (8.8 mag) is on the south edge of this curve
336
α(2000)19h 36m 41s, δ(2000) +12 20
Galactic Coordinates 49, -4
 Dark, diam. 1 - 2, in a slightly larger vacant space, BD+113912 (8.6 mag) in SW part
337
α(2000)19h 37m 01s, δ(2000) +12 23
Galactic Coordinates 49, -4
 Dark, diam. 3, with narrow extension for 17 to NW. This small spot, with its narrow extension, is in a relatively darker space in the star cloud.