NGC 3955

NGC 3955
NGC 3955 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationCrater
Right ascension11h 53m 57.1556s
Declination−23° 09′ 50.891″
Redshift0.004973±0.0000300
Heliocentric radial velocity1,491±9 km/s
Distance67.19 Mly (20.600 Mpc)
Group or clusterNGC 4038 Group (LGG 263)
Apparent magnitude (V)12.89
Characteristics
TypeS0/a pec
Size~105,400 ly (32.32 kpc) (estimated)
Apparent size (V)2.9′ × 0.9′
Other designations
ESO 504- G 026, IRAS 11514-2253, 2MASX J11535713-2309513, MCG -04-28-005, PGC 37320

NGC 3955 is a peculiar lenticular galaxy in the constellation of Crater. Its velocity with respect to the cosmic microwave background is 1,842±26 km/s, which corresponds to a Hubble distance of 88.6 ± 6.3 Mly (27.16 ± 1.94 Mpc). Additionally, one non-redshift measurement gives a closer distance of 67.19 Mly (20.600 Mpc). It was discovered by German-British astronomer William Herschel on 21 December 1786.

NGC 3955 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.

NGC 4038 group

NGC 3955 is a member of the NGC 4038 group (also known as LGG 263). This group contains 27 galaxies, including NGC 3956 [fr], NGC 3957 [fr], NGC 3981, NGC 4024 [fr], NGC 4027, NGC 4033, NGC 4035 [fr], the Antennae Galaxies, and NGC 4050 [fr], among others.

Supernova

One supernova has been observed in NGC 3955:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 3955". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 24 March 2026.
  2. 1 2 "Distance Results for NGC 3955". NASA/IPAC Extragalactic Database. NASA. Retrieved 24 March 2026.
  3. ↑ Herschel, William (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London. 79: 212–255. Bibcode:1789RSPT...79..212H. doi:10.1098/rstl.1789.0021.
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3955". Celestial Atlas. Retrieved 24 March 2026.
  5. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
  6. ↑ "NGC 3955". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 March 2026.
  7. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  8. ↑ "LGG 263". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 March 2026.
  9. 1 2 "SN 2026gzx". Transient Name Server. IAU. Retrieved 24 March 2026.