Astronomy:NGC 5784
From HandWiki
| NGC 5784 | |
|---|---|
 NGC 5784 imaged by Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 54m 16.4726s[1] |
| Declination | +42° 33′ 28.356″[1] |
| Redshift | 0.017912[1] |
| Helio radial velocity | 5370 ± 16 km/s[1] |
| Distance | 264.2 ± 18.5 Mly (81.01 ± 5.68 Mpc)[1] |
| Apparent magnitude (V) | 12.4[1] |
| Characteristics | |
| Type | S0[1] |
| Size | ~149,400 ly (45.82 kpc) (estimated)[1] |
| Apparent size (V) | 1.9′ × 1.8′[1] |
| Other designations | |
| IRAS 14524+4245, UGC 9592, MCG+07-31-006, PGC 53265[1] | |
NGC 5784 is a lenticular galaxy in the constellation of Boötes. Its velocity with respect to the cosmic microwave background is 5493 ± 18 km/s, which corresponds to a Hubble distance of 81.01 ± 5.68 Mpc (~264 million light-years).[1] It was discovered by German-British astronomer William Herschel on 9 April 1787.[2]
Supernovae
Two supernovae have been observed in NGC 5784:
- SN 2018mef (Type Ia, mag. 17.52) was discovered by the Zwicky Transient Facility on 7 June 2018.[3]
- SN 2023bch (Type Ia, mag. 15.4) was discovered by ASAS-SN on 30 January 2023.[4]
NGC 5739 Group
According to Abraham Mahtessian, NGC 5784 is part of the seven member NGC 5739 group (also known as [M98j] 234). The other six galaxies are: NGC 5598, NGC 5603, NGC 5696, NGC 5739, NGC 5787, and NGC 5860.[5]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 5784". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+5784.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 5784". https://cseligman.com/text/atlas/ngc57a.htm#5784.
- ↑ "SN 2018mef". IAU. https://www.wis-tns.org/object/2018mef.
- ↑ "SN 2023bch". IAU. https://www.wis-tns.org/object/2023bch.
- ↑ Mahtessian, A. P. (1998). "Groups of galaxies. III. Some empirical characteristics". Astrophysics 41 (3): 308–321. doi:10.1007/BF03036100. Bibcode: 1998Ap.....41..308M.
External links
- NGC 5784 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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