NGC 6708
| NGC 6708 | |
|---|---|
 NGC 6708 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Telescopium |
| Right ascension | 18h 55m 35.5961s[1] |
| Declination | −53° 43′ 24.494″[1] |
| Redshift | 0.008603±0.000043[1] |
| Heliocentric radial velocity | 2,579±13 km/s[1] |
| Distance | 116 Mly (35.7 Mpc)[1] |
| Group or cluster | IC 4797 group (LGG 425) |
| Apparent magnitude (V) | 12.7[1] |
| Characteristics | |
| Type | Sb[1] |
| Size | ~47,500 ly (14.56 kpc) (estimated)[1] |
| Apparent size (V) | 1.1′ × 0.9′[1] |
| Other designations | |
| ESO 183- G 027, IRAS 18515-5347, PGC 62569[1] | |
NGC 6708 is a spiral galaxy in the constellation of Telescopium. Its velocity with respect to the cosmic microwave background is 2,520±14 km/s, which corresponds to a Hubble distance of 121.2 ± 8.5 Mly (37.17 ± 2.62 Mpc).[1] Additionally, one non-redshift measurement gives a similar distance of 116 Mly (35.7 Mpc).[2] It was discovered by British astronomer John Herschel on 9 June 1836.[3][4]
IC 4797 group
[edit]According to A. M. Garcia, NGC 6708 is part of the IC 4797 group (also known as LGG 425). This group contains at least five galaxies, including NGC 6707, IC 4796, IC 4797, and ESO 183- G 030.[5]
Supernovae
[edit]Three supernovae have been observed in NGC 6708:
- SN 2004do (Type Ia, mag. 16.3) was discovered by South African amateur astronomer Berto Monard on 4 August 2004.[6][7]
- SN 2011ce (Type Ia-pec, mag. 15.8) was discovered by The CHilean Automatic Supernova sEarch (CHASE) on 19 April 2011.[8][9]
- SN 2025tam (Type II, mag. 16.044) was discovered by ATLAS on 2 August 2025.[10]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "Results for object NGC 6708". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 3 August 2025.
- ^ "Distance Results for NGC 6708". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 3 August 2025.
- ^ Herschel, John F. W. (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London. 154: 1–137. Bibcode:1864RSPT..154....1H. doi:10.1098/rstl.1864.0001.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 6708". Celestial Atlas. Retrieved 3 August 2025.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
- ^ Monard, L. A. G. (2004). "Supernova 2004do in NGC 6708". International Astronomical Union Circular (8382): 4. Bibcode:2004IAUC.8382....4M.
- ^ "SN 2004do". Transient Name Server. IAU. Retrieved 3 August 2025.
- ^ Maza, J.; et al. (2011). "Supernova 2011ce in NGC 6708 = PSN J18553580-5343290". Central Bureau Electronic Telegrams (2715): 1. Bibcode:2011CBET.2715....1M.
- ^ "SN 2011ce". Transient Name Server. IAU. Retrieved 3 August 2025.
- ^ "SN 2025tam". Transient Name Server. IAU. Retrieved 4 August 2025.
External links
[edit]
Media related to NGC 6708 at Wikimedia Commons- NGC 6708 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
