H-NGC6951
Galaxy in Cepheus
About
A barred spiral galaxy in Cepheus, about 75 million light-years away. It is in the Herschel 400, and five supernovae have been recorded in it since 1999.
Imaging tips
- Only about 4×3′ across, so it is too small to frame: use a long focal length and a fine pixel scale.
- At 22.3 mag/arcsec² it is faint for its size. One imager collected 750 minutes of luminance in 30-minute subs plus 450 minutes of RGB.
- Faint integrated flux nebulae sit between us and the galaxy and show up only in long exposures, so plan broadband data deep enough to reach them.
- The star-forming ring around the nucleus has a radius of about 5″, so it needs a very long focal length to resolve.
- Best in July and August; it peaks near 74° altitude from 50°N.
Facts
- Size
- 4′ × 3′
- Magnitude
- 11.0
- Coordinates
- RA 20h 37.3m, Dec +66° 6′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Jul, Aug
- Peak altitude
- 74° from 50°N, 59° from 35°N