NGC 6145

NGC 6145
NGC 6145 imaged by SDSS
Observation data (J2000 epoch)
ConstellationHercules
Right ascension16h 25m 02.3795s
Declination+40° 56′ 47.926″
Redshift0.028671±0.0000105
Heliocentric radial velocity8,595±3 km/s
Distance414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc)
Group or clusterAbell 2199
Apparent magnitude (V)14.5g
Characteristics
TypeSb
Size~149,000 ly (45.68 kpc) (estimated)
Apparent size (V)0.98′ × 0.5′
Other designations
HOLM 747A, 2MASX J16250238+4056478, MCG +07-34-021, PGC 58074, CGCG 224-017

NGC 6145 is a spiral galaxy in the constellation of Hercules. Its velocity with respect to the cosmic microwave background is 8,622±4 km/s, which corresponds to a Hubble distance of 414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc). Additionally, one non-redshift measurement gives a farther distance of 460 Mly (140 Mpc). It was discovered by British astronomer John Herschel on 12 May 1828.

NGC 6145 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.

Galaxy group and cluster

NGC 6145 and NGC 6147 [fr] are listed together as Holm 747 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937. NGC 6145 is also part of the galaxy cluster known as Abell 2199.

Supernova

One supernova has been observed in NGC 6145:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 6145". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 January 2026.
  2. ↑ "Distance Results for NGC 6145". NASA/IPAC Extragalactic Database. NASA. Retrieved 18 January 2026.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6145". Celestial Atlas. Retrieved 18 January 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. ↑ "NGC 6145". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 January 2026.
  6. ↑ Holmberg, Erik (1937). "A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems". Annals of the Observatory of Lund. 6: 1. Bibcode:1937AnLun...6....1H.
  7. ↑ "ACO 2199". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 January 2026.
  8. ↑ "SN 2025qmk". Transient Name Server. IAU. Retrieved 18 January 2026.