| NGC4545 | |
|---|---|
| 👁 Image NGC4545 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] | |
NGC4545 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 [fr], NGC 4512 [fr], NGC 4521 [fr], UGC 7848 [d], and UGC 7941 [d].[4][5]
Supernova
[edit]One supernova has been observed in NGC 4545: SN1940D (type unknown, mag. 15) was discovered by Josef J. Johnson on 25 July 1940.[6][7][8]
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 NGC4545". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 18 December 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC4545". 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.
- ^ "LGG 295". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 March 2026.
- ^ 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.
- ^ "SN1940D". Transient Name Server. IAU. Retrieved 18 December 2024.
External links
[edit]- 👁 Wikimedia Commons logo
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
