NGC 5605

NGC 5605
Intermediate spiral galaxy NGC 5605
Observation data (J2000 epoch)
Constellation	Libra
Right ascension	14^h 25^m 07.57^s[1]
Declination	−13° 09′ 46.8″[1]
Redshift	0.011294[1]
Heliocentric radial velocity	3386 ± 3 km/s[1]
Distance	174.9 ± 12.3 Mly (53.61 ± 3.76 Mpc)[1]
Apparent magnitude (V)	12.3[1]
Characteristics
Type	(R')SAB(rs)c pec?[1]
Size	~119,000 ly (36.50 kpc) (estimated)[1]
Apparent size (V)	1.5′ × 1.3′[1]
Other designations
IRAS 14223-1256, 2MASX J14250757-1309467, MCG -02-37-003, PGC 51492[1]

NGC 5605 is an intermediate spiral galaxy in the constellation of Libra. Its velocity with respect to the cosmic microwave background is 3635 ± 18 km/s, which corresponds to a Hubble distance of 174.9 ± 12.3 Mly (53.61 ± 3.76 Mpc).^[1] In addition, three non redshift measurements give a distance of 194.72 ± 0.68 Mly (59.700 ± 0.208 Mpc).^[2] The galaxy was discovered by German-British astronomer William Herschel on 11 May 1784.^[3]

The SIMBAD database lists NGC 5605 as 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]

Unique Trio of Supernovae

NGC 5605 is the only galaxy known where three supernovae were visible at the same time.^[5][6] The first was SN 2022bn (type Ib, mag. 18.6),^[7] discovered on 5 January 2022. The second supernova, SN 2022ec (type II, mag 18.8),^[8] was reported on 7 January. The third, SN 2022pv (type II, mag 19.1),^[9] was discovered on 13 January.

See also

• List of NGC objects (5001–6000)

References

1. "Results for object NGC 5605". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 September 2024.
2. "Distance Results for NGC 5605". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 1 September 2024.
3. Seligman, Courtney. "NGC 5605". Celestial Atlas. Retrieved 1 September 2024.
4. "NGC 5605". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 September 2024.
5. Bishop, David. "Multiple Supernovae in the same galaxy". Rochester Astronomy. Retrieved 1 September 2024.
6. Plait, Phil (12 April 2022). "For the first time, three supernovae are seen at the same time in a single galaxy!". SYFY. NBCUniversal. Retrieved 1 September 2024.
7. "SN 2022bn". Transient Name Server. IAU. Retrieved 1 September 2024.
8. "SN 2022ec". Transient Name Server. IAU. Retrieved 1 September 2024.
9. "SN 2022pv". Transient Name Server. IAU. Retrieved 1 September 2024.

External links

• Media related to NGC 5605 at Wikimedia Commons
• NGC 5605 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images