Astronomy:NGC 4696

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NGC 4696
NGC 4696 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationCentaurus
Right ascension 12h 48m 49.2614s[1]
Declination−41° 18′ 39.115″[1]
Redshift0.009904±0.0000400[1]
Helio radial velocity2,969±12 km/s[1]
Distance116 ± 9 Mly (35 ± 3 Mpc)[2]
Apparent magnitude (V)11.39[1]
Characteristics
TypeE1 pec[1]
Apparent size (V)4.5′ × 3.2′[1]
Other designations
ESO 322- G 091, MCG-07-26-051, PGC 43296[1]

NGC 4696 is an elliptical galaxy in the constellation Centaurus. Its velocity with respect to the cosmic microwave background is 3,251±23 km/s, which corresponds to a Hubble distance of 156.4 ± 11.0 Mly (47.95 ± 3.38 Mpc).[1] However, 25 non-redshift measurements give a much closer mean distance of 122.63 ± 3.90 Mly (37.600 ± 1.196 Mpc).[3] It was discovered by British astronomer James Dunlop on 7 May 1826.[4]

NGC 4696 is the brightest galaxy in the Centaurus Cluster, a large, rich cluster of galaxies in the constellation of the same name.[5] The galaxy is surrounded by many dwarf elliptical galaxies also located within the cluster.[5] There is believed to be a supermassive black hole at the center of the galaxy.[6]

Supernova

One supernova has been observed in NGC 4696:

  • SN 2017ejb (d) (Type Ia, mag. 17.2078) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 28 May 2017.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "Results for object NGC 4696". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+4696. 
  2. ↑ J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar et al. (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546 (2): 681–693. doi:10.1086/318301. Bibcode: 2001ApJ...546..681T. 
  3. ↑ "Distance Results for NGC 4696". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4696. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 4696". https://cseligman.com/text/atlas/ngc46a.htm#4696. 
  5. ↑ 5.0 5.1 A. Sandage; J. Bedke (1994). Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. ISBN 978-0-87279-667-6. 
  6. ↑ Mohon, Lee (2017-04-18). "The Arrhythmic Beating of a Black Hole Heart" (in en). NASA. https://www.nasa.gov/mission_pages/chandra/the-arrhythmic-beating-of-a-black-hole-heart.html. 
  7. ↑ "SN 2017ejb". IAU. https://www.wis-tns.org/object/2017ejb. 

Coordinates: Sky map 12h 48m 49.2614s, −41° 18′ 39.115″



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