Arp212
Galaxy in Pegasus
About
NGC 7625, a peculiar spiral in Pegasus about 78 million light-years away. Arp listed it among galaxies with irregularities, absorption and resolution. Its standout feature is a dust-lane ring, open on one side, about 15–20″ in radius, and its inner and outer parts appear to rotate in different planes. Sources give a size of about 1.6 × 1.4′.
Imaging tips
- Well under 2′ across, so it is too small to frame: use a long focal length and a fine pixel scale.
- Moderately faint for its size at 22.0 mag/arcsec², so plan many hours of broadband data.
- The dust ring is only about 15–20″ in radius, so it is a detail for fine sampling.
- Best around August and September; it climbs to about 57° from 50°N.
Facts
- Size
- 1.6′ × 1.4′
- Magnitude
- 12.5
- Coordinates
- RA 23h 20.5m, Dec +17° 14′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Aug, Sep
- Peak altitude
- 57° from 50°N, 72° from 35°N