B118
Dark Nebula in Scutum
About
A small dark nebula in Scutum, listed as LDN 509 with opacity class 6. It shares that Lynds entry with B117.
Imaging tips
- Dark nebulae call for broadband imaging, since the cloud is recorded as a gap in the star field.
- Only about 5 × 4′, so it is too small to frame: use a long focal length and a fine pixel scale.
- Best around June and July; it peaks near 33° altitude from 50°N.
- One imager photographed this cloud with a 12-inch f/8 Meade LX600 and a DSLR, using a focal reducer at prime focus, and presented it in black and white.
Facts
- Size
- 5′ × 4′
- Magnitude
- —
- Coordinates
- RA 18h 53.9m, Dec −7° 27′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Jun, Jul
- Peak altitude
- 33° from 50°N, 48° from 35°N