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NGC 4545
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| NGC 4545 | |
|---|---|
 NGC 4545 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Draco |
| Right ascension | 12h 34m 34.1587s[1] |
| Declination | +63° 31′ 30.63″[1] |
| Redshift | 0.009130[1] |
| Heliocentric radial velocity | 2,737±2 km/s[1] |
| Distance | 137.1 ± 9.6 Mly (42.04 ± 2.95 Mpc)[1] |
| Group or cluster | NGC 4545 Group (LGG 295) |
| Apparent magnitude (V) | 12.3[1] |
| Characteristics | |
| Type | SB(s)cd?[1] |
| Size | ~99,700 ly (30.58 kpc) (estimated)[1] |
| Apparent size (V) | 2.5′ × 1.5′[1] |
| Other designations | |
| IRAS 12323+6348, UGC 7747, MCG +11-15-064, PGC 41838, CGCG 315-047[1] | |
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).[1] However, 19 non-redshift measurements give a closer mean distance of 118.22 ± 5.34 Mly (36.247 ± 1.637 Mpc).[2] It was discovered by German-British astronomer William Herschel on 20 March 1790.[3]
NGC 4545 Group
[edit]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, NGC 4512, NGC 4521, UGC 7848, and UGC 7941.[4]
Supernova
[edit]One supernova has been observed in NGC 4545: SN 1940D (type unknown, mag. 15) was discovered by Josef J. Johnson on 25 July 1940.[5][6][7]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "Results for object NGC 4545". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 December 2024.
- ^ "Distance Results for NGC 4545". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 18 December 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 4545". Celestial Atlas. Retrieved 18 December 2024.
- ^ 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.
- ^ Johnson, Josef J. (13 September 1940). "Supernova in NGC 4545". Central Bureau for Astronomical Telegrams. 818. Observatory Copenhagen, IAU: 1. Retrieved 15 August 2025.
- ^ 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.
- ^ "SN 1940D". Transient Name Server. IAU. Retrieved 18 December 2024.
External links
[edit]
Media related to NGC 4545 at Wikimedia Commons- NGC 4545 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
