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

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). In addition, three non redshift measurements give a distance of 194.72 ± 0.68 Mly (59.700 ± 0.208 Mpc). The galaxy was discovered by German-British astronomer William Herschel on 11 May 1784.

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.

Unique Trio of Supernovae

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

v t e Constellation of Libra
List of stars in Libra Libra in Chinese astronomy
Stars	Bayer α α (Zubenelgenubi) β (Zubeneschamali) γ (Zubenelhakrabi) δ (Zuben Elakribi) ε ζ ζ ζ ζ η θ ι ι κ λ μ ν ξ ξ ο σ (Brachium) τ υ Flamsteed 2 3 4 5 10 11 12 16 17 18 22 23 26 28 30 36 37 41 42 47 48 49 50 30 Ser Variable HO KU KX HR 5455 HD 133112 133131 134439 134440 139139 140283 141569 141937 Other 2M1510 2MASS 1507−1627 Gliese 555 HE 1523-0901 WASP-57 WISE 1541−2250
Exoplanets 23 Librae b c γ Librae b c Gliese 581b c e WASP-189b
Star clusters NGC 5897
Galaxies	NGC 5605 5728 5792 5793 5861 5885 5890 5898 5917 Other AP IC 1059 IRAS 14348-1447 PKS 1510-089
Category

• NGC objects
• Principal Galaxies Catalogue objects
• MCG objects
• IRAS catalogue objects
• Libra (constellation)
• Astronomical objects discovered in 1784
• Discoveries by William Herschel
• Intermediate spiral galaxies
• Seyfert galaxies