H-NGC4725
Galaxy in Coma Berenices
About
A barred spiral in Coma Berenices, about 40 million light-years away and the leading galaxy of the Coma I Group. Instead of two arms it shows a single main arm winding out of a ring of star formation, a shape linked to encounters with neighbouring galaxies. It is in the Herschel 400.
Imaging tips
- At 2200–3670 mm on APS-C (3380–5630 mm on full frame) the galaxy, roughly 10′ across, fits the frame with room around it.
- Faint at 22.7 mag/arcsec². One imager collected 5 h 40 min: 25 five-minute luminance frames plus 43 five-minute frames from a one-shot colour camera.
- That frame also held NGC 4712 and NGC 4747, placed on opposite sides of the galaxy, so the field holds more than one target.
- Best around March and April; it peaks near 65° from 50°N.
Facts
- Size
- 11′ × 8′
- Magnitude
- 9.2
- Coordinates
- RA 12h 50.5m, Dec +25° 30′
- Framing, APS-C
- 2200–3670 mm
- Framing, full frame
- 3380–5630 mm
- Best months
- Mar, Apr
- Peak altitude
- 66° from 50°N, 81° from 35°N