Galaxy · constellation Com
IC 3657
IC 3657PGC 4337363
Catalogue data
- Right ascension
- 12h 41m 19.0s
- Declination
- +21° 40' 21"
- Size
- 13.8″ × 11.4″
- Position angle
- 20°
- Magnitude
- 17.8 (B)
- Surface brightness
- 23.50 mag/arcsec²
- Hubble type
- E
- Difficulty
- 5/5
- Suggested techniques
- LRGB, RGB, OSC
- Data source
- OpenNGC
The IC number includes a defect on the original Heidelberg plate.
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