NGC 5127

NGC 5127
NGC 5127 imaged by SDSS
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension13h 23m 45.0294s
Declination+31° 33′ 56.870″
Redshift0.016184±0.00000876
Heliocentric radial velocity4,852±3 km/s
Distance223.42 ± 23.81 Mly (68.500 ± 7.300 Mpc)
Group or clusterNGC 5127 group (LGG 350)
Apparent magnitude (V)13.3g
Characteristics
TypeE pec
Size~183,200 ly (56.16 kpc) (estimated)
Apparent size (V)1.54′ × 1.08′
Other designations
2MASX J13234497+3133568, UGC 8419, MCG +05-32-013, PGC 46809, CGCG 161-042

NGC 5127 is an elliptical galaxy in the constellation of Canes Venatici. Its velocity with respect to the cosmic microwave background is 5,092±17 km/s, which corresponds to a Hubble distance of 244.9 ± 17.2 Mly (75.10 ± 5.26 Mpc). However, two non-redshift measurements give a closer mean distance of 223.42 ± 23.81 Mly (68.500 ± 7.300 Mpc). It was discovered by German-British astronomer William Herschel on 13 March 1785.

NGC 5127 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms. It is also a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.

Supermassive black hole

According to a study published in 2009 and based on the internal velocity of the galaxy measured by the Hubble Space Telescope, the mass of the supermassive black hole at the center of NGC 5127 is between 77 million and 510 million M☉.

NGC 5127 group

NGC 5127 is the main galaxy in a group of galaxies named after it. The NGC 5127 group (also known as LGG 350) has at least 10 galaxies, including NGC 5166 [fr], UGC 8392 [d], UGC 8397 [d], UGC 8426 [d], UGC 8451 [d], UGC 8496 [d], UGC 8517, CGCG 161-20, and CGCG 161-41 [d].

Supernovae

Two supernovae has been observed in NGC 5127:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 5127". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 October 2026.
  2. 1 2 "Distance Results for NGC 5127". NASA/IPAC Extragalactic Database. NASA. Retrieved 5 October 2026.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 5127". Celestial Atlas. Retrieved 5 October 2026.
  4. ↑ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M.; Oi, N.; Ohyama, Y.; Takita, S.; Yamauchi, C.; Yano, K. (2014). "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey". The Astrophysical Journal. 788 (1): 45. arXiv:1404.4937. Bibcode:2014ApJ...788...45T. doi:10.1088/0004-637X/788/1/45.
  5. 1 2 "NGC 5127". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 October 2026.
  6. ↑ Best, P. N.; Heckman, T. M. (2012). "On the fundamental dichotomy in the local radio-AGN population: Accretion, evolution and host galaxy properties". Monthly Notices of the Royal Astronomical Society. 421 (2): 1569. arXiv:1201.2397. Bibcode:2012MNRAS.421.1569B. doi:10.1111/j.1365-2966.2012.20414.x.
  7. ↑ Beifiori, A.; Sarzi, M.; Corsini, E. M.; Bontà, E. Dalla; Pizzella, A.; Coccato, L.; Bertola, F. (2009). "UPPER LIMITS ON THE MASSES OF 105 SUPERMASSIVE BLACK HOLES FROM HUBBLE SPACE TELESCOPE /SPACE TELESCOPE IMAGING SPECTROGRAPH ARCHIVAL DATA". The Astrophysical Journal. 692: 856–868. arXiv:0809.5103. doi:10.1088/0004-637X/692/1/856.
  8. ↑ 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.
  9. ↑ "LGG 350". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 October 2026.
  10. ↑ Pollas, C.; Filippenko, A. V.; Matheson, T.; Cyrot, M.; Hammond, A. (1991). "Supernova 1991bi in NGC 5127". International Astronomical Union Circular (5404): 1. Bibcode:1991IAUC.5404....1P.
  11. ↑ "SN 1991bi". Transient Name Server. IAU. Retrieved 5 October 2026.
  12. ↑ "SN 2026abxl". Transient Name Server. IAU. Retrieved 5 October 2026.

Notes