vdB138
Reflection Nebula in Cygnus
About
A small reflection nebula in Cygnus around HD 199714, a B8 supergiant of about magnitude 8.3. The star's Gaia parallax puts it roughly 2,000 light-years away.
Imaging tips
- About 4′ across, so it is too small to frame: use a long focal length and a fine pixel scale.
- A reflection nebula, so broadband suits it.
- Best around July and August, peaking near 88° altitude from 50°N.
- One imager reached 19 h 44 min with a 10-inch f/3.6 astrograph, a monochrome CCD and LRGB filters: about 10 hours of luminance and 3 h 12 min in each colour, in a field about 1° across.
- Another imager used a DSLR and a Takahashi Epsilon-130 for 34 subs of 400 s (3 h 46 min); their field was 5.7° wide, with IC 5076 nearby.
Facts
- Size
- 4′
- Magnitude
- —
- Coordinates
- RA 20h 57.3m, Dec +48° 18′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Jul, Aug
- Peak altitude
- 88° from 50°N, 77° from 35°N