Astronomy:NGC 6708

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NGC 6708
NGC 6708 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationTelescopium
Right ascension 18h 55m 35.5961s[1]
Declination−53° 43′ 24.494″[1]
Redshift0.008603±0.000043[1]
Helio radial velocity2,579±13 km/s[1]
Distance116 Mly (35.7 Mpc)[1]
Group or clusterIC 4797 group (LGG 425)
Apparent magnitude (V)12.7[1]
Characteristics
TypeSb[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

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

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

References

  1. ↑ 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 6708". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6708. 
  2. ↑ "Distance Results for NGC 6708". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6708. 
  3. ↑ Herschel, John F. W. (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 154: 1–137. doi:10.1098/rstl.1864.0001. Bibcode: 1864RSPT..154....1H. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6708". https://cseligman.com/text/atlas/ngc67.htm#6708. 
  5. ↑ 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. 
  6. ↑ Monard, L. A. G. (2004). "Supernova 2004do in NGC 6708". International Astronomical Union Circular (8382): 4. Bibcode: 2004IAUC.8382....4M. http://www.cbat.eps.harvard.edu/iauc/08300/08382.html#Item4. 
  7. ↑ "SN 2004do". IAU. https://www.wis-tns.org/object/2004do. 
  8. ↑ Maza, J. et al. (2011). "Supernova 2011ce in NGC 6708 = PSN J18553580-5343290". Central Bureau Electronic Telegrams (2715): 1. Bibcode: 2011CBET.2715....1M. http://www.cbat.eps.harvard.edu/iau/cbet/002700/CBET002715.txt. 
  9. ↑ "SN 2011ce". IAU. https://www.wis-tns.org/object/2011ce. 
  10. ↑ "SN 2025tam". IAU. https://www.wis-tns.org/object/2025tam. 

Coordinates: Sky map 18h 55m 35.5961s, −53° 43′ 24.494″



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