Astronomy:NGC 6925

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NGC 6925
NGC 6925 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationMicroscopium
Right ascension 20h 34m 20.5638s[1]
Declination−31° 58′ 50.965″[1]
Redshift0.009303±0.00000500[1]
Helio radial velocity2,789±1 km/s[1]
Distance92.94 ± 2.66 ± 13.57 Mly (28.497 ± 0.817 ± 4.162 Mpc)[1]
Group or clusterNGC 6925 group (LGG 437)[2]
Apparent magnitude (V)11.3[3]
Apparent magnitude (B)12.09[3]
Characteristics
TypeSA(s)bc[1]
Size~163,600 ly (50.16 kpc) (estimated)[1]
Apparent size (V)3.100′ × 1.116′[3]
Other designations
ESO 463- G 004, IRAS 20312-3209, IC 5015, MCG-05-48-022, PGC 64980[1]

NGC 6925 is an unbarred spiral galaxy in the constellation Microscopium. Its velocity with respect to the cosmic microwave background is 2,572±15 km/s, which corresponds to a Hubble distance of 123.7 ± 8.7 Mly (37.93 ± 2.66 Mpc).[1] However, 34 non-redshift measurements give a much closer mean distance of 92.94 ± 2.66 Mly (28.497 ± 0.817 Mpc).[4] It was discovered by British astronomer John Herschel on 31 July 1834.[5]

NGC 6925 is lens-shaped, as it lies almost edge on to observers on Earth. It lies 3.7 degrees west-northwest of Alpha Microscopii.[6]

NGC 6925 group

NGC 6925 is the main galaxy in a group of galaxies that bears its name. The NGC 6925 group (also known as LGG 437) has at least four galaxies, including NGC 6923 (fr), IC 5020 (fr) and ESO 462-31 (d).[2][7]

Supernova

One supernova has been observed in NGC 6925. SN 2011ei (Type IIb, mag. 18) was discovered by Stuart Parker in New Zealand on 25 July 2011.[8][9][10]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NED results for object NGC 6925". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. https://ned.ipac.caltech.edu/byname?objname=NGC+6925. 
  2. ↑ 2.0 2.1 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. 
  3. ↑ 3.0 3.1 3.2 "NGC 6925". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6925. 
  4. ↑ "Distance Results for NGC 6925". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6925. 
  5. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6925". https://cseligman.com/text/atlas/ngc69.htm#6925. 
  6. ↑ Bakich, Michael E. (2010). 1001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers. Patrick Moore's Practical Astronomy Series. Springer. p. 289. ISBN 978-1-4419-1776-8. https://books.google.com/books?id=qEhpS7d5ZdAC&pg=PA289. 
  7. ↑ "LGG 437". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+437. 
  8. ↑ Marples, P.; Parker, S.; Stritzinger, M.; Drescher, C.; Bock, G. (2011). "Supernova 2011ei in NGC 6925 = PSN J20342262-3158236". Central Bureau Electronic Telegrams (2777): 1. Bibcode: 2011CBET.2777....1M. http://www.cbat.eps.harvard.edu/iau/cbet/002700/CBET002777.txt. 
  9. ↑ "SN 2011ei". IAU. https://www.wis-tns.org/object/2011ei. 
  10. ↑ Bishop, David. "Supernova 2011ei in NGC 6925". http://www.rochesterastronomy.org/sn2011/sn2011ei.html. 

Coordinates: Sky map 20h 34m 20.5638s, −31° 58′ 50.965″

Template:NGC objects: 6001-7000



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