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NGC 2305
The elliptical galaxy NGC 2305 (center) with NGC 2307 (below)
Observation data (J2000 epoch)
Constellation	Volans
Right ascension	06 48 37.2674
Declination	−64° 16′ 23.848″
Redshift	0.011671
Heliocentric radial velocity	3499 ± 20 km/s
Distance	173.4 ± 12.2 Mly (53.17 ± 3.75 Mpc)
Group or cluster	RR 143
Apparent magnitude (V)	11.7
Characteristics
Type	E2: pec
Size	~188,200 ly (57.71 kpc) (estimated)
Apparent size (V)	2.1′ × 1.5′
Other designations
2MASX J06483729-6416240, PGC 19641, ESO 087- G 044

NGC 2305 is an elliptical galaxy in the constellation of Volans. Its velocity with respect to the cosmic microwave background is 3605 ± 21 km/s, which corresponds to a Hubble distance of 53.17 ± 3.75 Mpc (∼174 million light-years). It was discovered by British astronomer John Herschel on 30 November 1834.

The galaxy NGC 2305 forms a physical pair with NGC 2307, collectively named RR 143, with a distance of at least 51 kpc between the galaxies.

Two supernovae have been observed in NGC 2305:

• SN 2011fn (type I, mag 17.9) was discovered by Stu Parker on 29 June 2011. There is some uncertainty about this supernova; it was classified as either type Ia or type Ic, and it is possible that the host galaxy of this supernova was not NGC 2305, but instead the nearby galaxy 2MASS J06483060-6415588.
• SN 2023txv (type Ia, mag 17.4) was discovered by ATLAS on 3 October 2023.

See also

• List of NGC objects (2001–3000)

References

1. ^ "Results for object NGC 2305". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 August 2024.
2. Seligman, Courtney. "New General Catalogue Objects: NGC 2305". Celestial Atlas. Retrieved 15 December 2024.
3. Trinchieri, G.; Rampazzo, R. (2001). "ROSAT-HRIobservations of six southern galaxy pairs". Astronomy & Astrophysics. 374 (2): 454. Bibcode:2001A&A...374..454T. doi:10.1051/0004-6361:20010750.
4. "SN 2011fn". Transient Name Server. IAU. Retrieved 15 December 2024.
5. Bock, G.; Parker, S.; Drescher, C. (2011). "Supernova 2011fn near NGC 2305 = PSN J06483496-6415545". Central Bureau Electronic Telegrams. 2814: 1. Bibcode:2011CBET.2814....1B.
6. "SN 2023txv". Transient Name Server. IAU. Retrieved 15 December 2024.

External links

• [REDACTED] Media related to NGC 2305 at Wikimedia Commons
• NGC 2305 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

v t e Constellation of Volans
List of stars in Volans Volans in Chinese astronomy
Stars	Bayer α β γ δ ε ζ η θ ι κ Variable R S UY HR 2505 2531 2536 2662 2712 2888 2979 2980 3036 3038 3081 3171 3280 3346 3370 3417 3491 3495 3537 3544 3610 HD 59640 68402 74423 76700 76920 Other L 98-59 L 97-12 WD 0806−661 WISE 0734−7157
Exoplanets HD 68402 b HD 76700 b L 98-59 b
Galaxies	NGC 2305 2397 2442 2443 2466 Other AM 0644-741
Galaxy clusters SMACS J0723.3–7327
Category

• NGC objects
• Principal Galaxies Catalogue objects
• Volans
• Astronomical objects discovered in 1834
• Discoveries by John Herschel
• Elliptical galaxies
• ESO objects