Astronomy:NGC 6943

From HandWiki
NGC 6943
NGC 6943 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationPavo
Right ascension 20h 44m 33.7818s[1]
Declination−68° 44′ 51.324″[1]
Redshift0.010387±0.0000130[1]
Helio radial velocity3,114±4 km/s[1]
Distance113.08 ± 2.32 Mly (34.671 ± 0.712 Mpc)[2]
Apparent magnitude (V)12.05[1]
Characteristics
TypeSAB(r)cd[1]
Size~173,400 ly (53.15 kpc) (estimated)[1]
Apparent size (V)4.0′ × 2.0′[1]
Other designations
ESO 074- G 006, IRAS 20398-6855, PGC 65295[1]

NGC 6943 is a large barred spiral galaxy in the constellation of Pavo. Its velocity with respect to the cosmic microwave background is 3,049±6 km/s, which corresponds to a Hubble distance of 146.7 ± 10.3 Mly (44.97 ± 3.15 Mpc).[1] However, 17 non-redshift measurements give a much closer mean distance of 113.08 ± 2.32 Mly (34.671 ± 0.712 Mpc).[2] It was discovered by British astronomer John Herschel on 27 June 1835.[3]

NGC 6943 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[4][5]

Supernovae

Two supernovae has been observed in NGC 6943:

  • SN 1998ew (Type II, mag. 14) was discovered by Roberto Antezana on 23 November 1998.[6][7]
  • SN 2005av (Type IIn, mag. 15.4) was discovered by Berto Monard (it) on 24 March 2005.[8][9]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 6943". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6943. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 6943". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6943. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6943". https://cseligman.com/text/atlas/ngc69.htm#6943. 
  4. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D. et al. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society 494 (2): 1784. doi:10.1093/mnras/staa766. Bibcode: 2020MNRAS.494.1784A. 
  5. ↑ "NGC 6943". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6943. 
  6. ↑ Maza, J.; Antezana, R.; Gonzalez, L. E.; Patat, F.; Christlieb, N.; Sollerman, J. (1998). "Supernova 1998ew in NGC 6943". International Astronomical Union Circular (7061): 1. Bibcode: 1998IAUC.7061....1M. http://www.cbat.eps.harvard.edu/iauc/07000/07061.html#Item1. 
  7. ↑ "SN 1998ew". IAU. https://www.wis-tns.org/object/1998ew. 
  8. ↑ Monard, L. A. G. (2005). "Supernova 2005av in NGC 6943". International Astronomical Union Circular (8499): 1. Bibcode: 2005IAUC.8499....1M. http://www.cbat.eps.harvard.edu/iauc/08400/08499.html#Item1. 
  9. ↑ "SN 2005av". IAU. https://www.wis-tns.org/object/2005av. 

Coordinates: Sky map 20h 44m 33.7818s, −68° 44′ 51.324″

Template:NGC objects: 6001-7000



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:NGC_6943&oldid=4624892"