IC 1657

IC 1657 / IC 1663
IC 1657 imaged by DESI Legacy Survey
Observation data
ConstellationSculptor
Right ascension01h 14m 07.0s
Declination−32° 39′ 03″
Redshift0.011952 ± 0.000013
Heliocentric radial velocity3583±4 km/s
Distance159 ± 11 Mly (48.6 ± 3.4 Mpc)
Apparent magnitude (V)12.4
Apparent magnitude (B)13.2
Surface brightness12.6
Characteristics
Type(R')SB(s)bc; Sy2; H II
Apparent size (V)2.40′ × 0.6′
Notable featuresPosition angle: 170°; galaxy group: LDCE 78
Other designations
IRAS 1117-3254, 2MASX J01140701-3239032, IC 1657/1663, MCG -06-03-030, PGC 4440

IC 1657 (also known as IC 1663) is an active barred spiral galaxy with extended star-forming regions of the Hubble type SBbc in the constellation of Sculptor in the southern sky. It is estimated to be about 159 million light-years from the Milky Way and has a diameter of approximately 115,000 light-years.

In the same region of the sky lie, among others, the galaxies NGC 427, NGC 439, and NGC 441.

The object was discovered on 4 September 1897 by Lewis Swift.

Supernovae

Two supernovae have been observed in IC 1657:

References

  1. 1 2 3 4 5 6 7 NASA/IPAC Extragalactic Database
  2. 1 2 3 4 5 SEDS: IC 1657
  3. ↑ Seligman
  4. ↑ Pignata, G.; Bufano, F.; Gonzalez-Gaitan, S.; Marchi, S.; Forster, F.; Anderson, J.; Gutierrez, C.; Taubenberger, S.; Valenti, S.; Pastorello, A.; Benetti, S.; Smartt, S. J.; Smith, K.; Young, D.; Inserra, C.; Sullivan, M.; Gal-Yam, A.; Yaron, O. (2012). "Supernova 2012hd in IC 1657 = PSN J01140746-3239077". Central Bureau Electronic Telegrams (3324): 1. Bibcode:2012CBET.3324....1P.
  5. ↑ "SN 2012hd". Transient Name Server. IAU. Retrieved 14 March 2026.
  6. ↑ "SN 2016gfk". Transient Name Server. IAU. Retrieved 14 March 2026.