NGC 4541
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| NGC 4541 | |
|---|---|
NGC 4541 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 35m 10.6731s[1] |
| Declination | −00° 13′ 16.085″[1] |
| Redshift | 0.022966±0.0000170[1] |
| Heliocentric radial velocity | 6,885±5 km/s[1] |
| Distance | 312.09 ± 9.57 Mly (95.688 ± 2.933 Mpc)[1] |
| Apparent magnitude (V) | 13.6g[1] |
| Characteristics | |
| Type | (R')SAB(r)bc[1] |
| Size | ~154,300 ly (47.32 kpc) (estimated)[1] |
| Apparent size (V) | 1.58′ × 0.68′[1] |
| Other designations | |
| IRAS 12326+0003, 2MASX J12351066-0013157, UGC 7749, MCG +00-32-024, PGC 41911, CGCG 014-071[1] | |
NGC 4541 is an intermediate spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 7,229±25 km/s, which corresponds to a Hubble distance of 347.8 ± 24.4 Mly (106.63 ± 7.47 Mpc).[1] However, eight non-redshift measurements give a closer mean distance of 312.09 ± 9.57 Mly (95.688 ± 2.933 Mpc).[2] It was discovered by German-British astronomer William Herschel on 1 January 1786.[3]
NGC 4541 is a Seyfert II galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4][5] NGC 4541 is also a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.[6][5]
Two supernovae have been observed in NGC 4541:
- SN 2007gq (type unknown, mag. 16.6) was discovered by Berto Monard on 4 August 2007.[7][8]
- PTF11bpx (Type II, mag. 19.5) was discovered by the Palomar Transient Factory on 4 April 2011.[9]