B35
Dark Nebula in Orion
About
A dark nebula in Orion, seen against the glowing gas of the Lambda Orionis Ring, about 1,500 light-years away. Infrared images show it hides young stars and an Herbig-Haro object, HH 175.
Imaging tips
- At 3030–5050 mm on APS-C the 8×5′ cloud takes a third to half of the frame; on full frame it needs longer still, so plan a fine pixel scale.
- One imager gathered 43 h 20 min in total: L, R, G and B plus 17 h 40 min of Hα (53 × 1200 s), though a dark nebula itself calls for broadband.
- B30 lies in the same ring, but a very wide field would be needed to show both.
- Best in December; it peaks near 49° altitude from 50°N.
- That same imager framed a field about 3° across, a wide view that takes in the surrounding Lambda Orionis Ring rather than only the 8×5′ cloud.
Facts
- Size
- 8′ × 5′
- Magnitude
- —
- Coordinates
- RA 5h 45.5m, Dec +9° 3′
- Framing, APS-C
- 3030–5050 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Dec
- Peak altitude
- 49° from 50°N, 64° from 35°N