NGC 772
| NGC 772 | |
|---|---|
 NGC 772 imaged by the Gemini Observatory[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Aries |
| Right ascension | 01h 59m 19.5443s[2] |
| Declination | +19° 00′ 27.751″[2] |
| Redshift | 0.008236[2] |
| Heliocentric radial velocity | 2469 ± 2 km/s[2] |
| Distance | 105.7 ± 7.5 Mly (32.42 ± 2.29 Mpc)[2] |
| Apparent magnitude (V) | 11.1[2] |
| Characteristics | |
| Type | SA(s)b[2] |
| Size | ~204,000 ly (62.56 kpc) (estimated)[2] |
| Apparent size (V) | 7.2′ × 4.3′[2] |
| Other designations | |
| IRAS 01565+1845, Arp 78, UGC 1466, MCG +03-06-011, PGC 7525, CGCG 461-018[2] | |
NGC 772 (also known as Arp 78 or the Fiddlehead Galaxy[3]) is a large unbarred spiral galaxy approximately 106 million light-years away in the constellation Aries. It was discovered by German-British astronomer William Herschel on 29 November 1785.[4][5]
Characteristics
[edit | edit source]At around 200,000 light years in diameter, NGC 772 is somewhat larger than the Milky Way Galaxy,[6] and is surrounded by several satellite galaxies – including the dwarf elliptical, NGC 770 – whose tidal forces on the larger galaxy have likely caused the emergence of a single elongated outer spiral arm that is much more developed and stronger than the other arms. Halton Arp includes NGC 772 in his Atlas of Peculiar Galaxies as Arp 78, where it is described as a "Spiral galaxy with a small high-surface brightness companion".
NGC 772 probably has a H II nucleus, but it may be a transitional object.[7]
Supernovae
[edit | edit source]Three supernovae have been observed in NGC 772:
- SN 2003hl (Type II, mag. 16.5) was discovered by LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 20 August 2003.[8][9]
- SN 2003iq (Type II, mag. 16.4) was discovered by Jean-Marie Llapasset on 8 October 2003.[10][11][12] This supernova was visible at the same time as SN 2003hl, which was discovered 7 weeks prior.[13]
- SN 2022qze (Type II-P, mag. 19.89) was discovered by Pan-STARRS on 8 August 2022.[14]
Gallery
[edit | edit source]-
RGB image of the galaxy NGC 772 and dwarf galaxy NGC 770 (top center) interacting, from the Liverpool Telescope -
![Center of the galaxy imaged by the Hubble Space Telescope.[15]](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/NGC_772_A_Rival_to_the_Milky_Way.jpg/120px-NGC_772_A_Rival_to_the_Milky_Way.jpg)
Center of the galaxy imaged by the Hubble Space Telescope.[15]
![Center of the galaxy imaged by the Hubble Space Telescope.[15]](/index.php/File:NGC_772_A_Rival_to_the_Milky_Way.jpg)
See also
[edit | edit source]References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e f g h i j Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]
- Spiral Galaxy NGC 772; Elliptical Galaxy NGC 770
- NGC 772 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NGC 772 (Arp 78) at Constellation Guide
Lua error in mw.title.lua at line 392: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal').
 | This spiral galaxy article is a stub. You can help Wikipedia by expanding it. |