vdB145
Reflection Nebula in Cygnus
About
A small reflection nebula in Cygnus that shines with the light of HD 206887, a star of about magnitude 8. Its distance is not well known, since the star's parallax measurement is unreliable, but it lies within the Orion Arm.
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. One imager took LRGB with 6 × 10 min of luminance and 5 × 10 min per colour, 3.5 hours in all.
- That imager used a 12-inch f/3.6 astrograph with a 1.95° × 1.3° field, which shows the nebula as a small object in a wide star field.
- Best from July to September, peaking near 89° altitude from 50°N.
Facts
- Size
- 4′
- Magnitude
- —
- Coordinates
- RA 21h 43.6m, Dec +48° 53′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Jul, Aug, Sep
- Peak altitude
- 89° from 50°N, 76° from 35°N