| NGC 4045 | |
|---|---|
 NGC 4045 imaged bySDSS | |
| Observation data (J2000epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 02m 42.2488s[1] |
| Declination | +01° 58′ 36.271″[1] |
| Redshift | 0.006591±0.00000334[1] |
| Heliocentric radial velocity | 1,976±1 km/s[1] |
| Distance | 100.24 ± 2.77 Mly (30.733 ± 0.849 Mpc)[1] |
| Apparent magnitude (V) | 12.9g[1] |
| Characteristics | |
| Type | SAB(r)a[1] |
| Size | ~87,500 ly (26.82 kpc) (estimated)[1] |
| Apparent size (V) | 2.38′ × 1.14′[1] |
| Other designations | |
| HOLM 320A,IRAS 12001+0215,NGC 4046,UGC 7021,MCG +00-31-022,PGC 38031,CGCG 013-046[1] | |
NGC 4045 is abarred spiral galaxy in theconstellation ofVirgo. Its velocity with respect to thecosmic microwave background is2,334±25 km/s, which corresponds to aHubble distance of 112.3 ± 8.0 Mly (34.42 ± 2.44 Mpc).[1] However, 15non-redshift measurements give a closer mean distance of 100.24 ± 2.77 Mly (30.733 ± 0.849 Mpc).[2] It was discovered by German-British astronomerWilliam Herschel on 20 December 1784.[3][4] It was also observed by German astronomerHeinrich Louis d'Arrest on 10 April 1863, causing it to be listed a second time in theNew General Catalogue, asNGC 4046.
NGC 4045 is aLINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[1] Also, the galaxy is listed as having anactive galactic nucleus, and as being aradio galaxy.[5]
NGC 4045 and neighboring galaxyPGC 38033 (also known asNGC 4045A) are listed together asHolm 320 inErik Holmberg'sA Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[6] However, since PGC 38033 is over twice as distant (~81.6 Mpc)[7] as NGC 4045, the grouping is purely an optical alignment.
Onesupernova has been observed in NGC 4045:
Oneluminous blue variable has been observed in NGC 4045:
Media related toNGC 4045 at Wikimedia Commons
