NGC 4545

NGC 4545
NGC 4545 imaged by SDSS
Observation data (J2000 epoch)
ConstellationDraco
Right ascension12h 34m 34.1587s
Declination+63° 31′ 30.63″
Redshift0.009130
Heliocentric radial velocity2,737±2 km/s
Distance137.1 ± 9.6 Mly (42.04 ± 2.95 Mpc)
Group or clusterNGC 4545 Group (LGG 295)
Apparent magnitude (V)12.3
Characteristics
TypeSB(s)cd?
Size~99,700 ly (30.58 kpc) (estimated)
Apparent size (V)2.5′ × 1.5′
Other designations
IRAS 12323+6348, UGC 7747, MCG +11-15-064, PGC 41838, CGCG 315-047

NGC 4545 is a barred spiral galaxy in the constellation of Draco. Its velocity with respect to the cosmic microwave background is 2,850±8 km/s, which corresponds to a Hubble distance of 137.1 ± 9.6 Mly (42.04 ± 2.95 Mpc). However, 19 non-redshift measurements give a closer mean distance of 118.22 ± 5.34 Mly (36.247 ± 1.637 Mpc). It was discovered by German-British astronomer William Herschel on 20 March 1790.

NGC 4545 Group

NGC 4545 is the brightest galaxy in a group of galaxies that bears its name. The NGC 4545 group (also known as LGG 295) has at least six members, including NGC 4510 [fr], NGC 4512 [fr], NGC 4521 [fr], UGC 7848 [d], and UGC 7941 [d].

Supernova

One supernova has been observed in NGC 4545: SN 1940D (type unknown, mag. 15) was discovered by Josef J. Johnson on 25 July 1940.

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 4545". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 December 2024.
  2. ↑ "Distance Results for NGC 4545". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 18 December 2024.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 4545". Celestial Atlas. Retrieved 18 December 2024.
  4. ↑ 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.
  5. ↑ "LGG 295". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 March 2026.
  6. ↑ Johnson, Josef J. (13 September 1940). "Supernova in NGC 4545". Central Bureau Electronic Telegrams (818). Observatory Copenhagen, IAU: 1. Retrieved 15 August 2025.
  7. ↑ Johnson, Josef J. (1940). "A Supernova in NGC 4545". Publications of the Astronomical Society of the Pacific. 52 (309): 331. Bibcode:1940PASP...52..331J. doi:10.1086/125215.
  8. ↑ "SN 1940D". Transient Name Server. IAU. Retrieved 18 December 2024.