Astronomy:NGC 5493

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NGC 5493
NGC 5493 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 14h 11m 29.3824s[1]
Declination−05° 02′ 37.090″[1]
Redshift0.008889±0.0000170[1]
Helio radial velocity2,665±5 km/s[1]
Distance64.73 ± 31.32 Mly (19.847 ± 9.602 Mpc)[1]
Group or clusterNGC 5427 group (LGG 374)
Apparent magnitude (V)12.27[1]
Characteristics
TypeS0 pec edge-on[1]
Size~41,100 ly (12.60 kpc) (estimated)[1]
Apparent size (V)1.6′ × 1.3′[1]
Other designations
MCG-01-36-013, PGC 50670[1]

NGC 5493 is a peculiar lenticular galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 2,929±19 km/s, which corresponds to a Hubble distance of 140.9 ± 9.9 Mly (43.20 ± 3.04 Mpc).[1] However, three non-redshift measurements give a much closer mean distance of 64.73 ± 31.32 Mly (19.847 ± 9.602 Mpc).[2] It was discovered by German-British astronomer William Herschel on 22 February 1787.[3][4]

NGC 5493 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.[5][6]

NGC 5427 group

According to A. M. Garcia, NGC 5493 is a member of the NGC 5427 group (also known as LGG 374). This galaxy group has at least four other members, including NGC 5426, NGC 5427, NGC 5468, and NGC 5472 (fr).[7][8]

Supernova

One supernova has been observed in NGC 5493:

  • SN 1990M (Type Ia, mag. 13.5) was discovered by Robert Evans on 15 June 1990.[9][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 5493". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+5493. 
  2. ↑ "Distance Results for NGC 5493". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+5493. 
  3. ↑ Herschel, W. (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London 79: 212–255. doi:10.1098/rstl.1789.0021. Bibcode: 1789RSPT...79..212H. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 5493". https://cseligman.com/text/atlas/ngc54a.htm#5493. 
  5. ↑ 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. 
  6. ↑ "NGC 5493". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5493. 
  7. ↑ 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. 
  8. ↑ "LGG 374". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+374. 
  9. ↑ Evans, R.; Cragg, T. (1990). "Supernova 1990M in NGC 5493". International Astronomical Union Circular (5033): 1. Bibcode: 1990IAUC.5033....1E. http://www.cbat.eps.harvard.edu/iauc/05000/05033.html#item1. 
  10. ↑ "SN 1990M". IAU. https://www.wis-tns.org/object/1990M. 

Coordinates: Sky map 14h 11m 29.3824s, −05° 02′ 37.090″



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