Astronomy:NGC 3981

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NGC 3981
NGC 3981 imaged by the DECam on the Víctor M. Blanco Telescope.[1]
Observation data (J2000[2] epoch)
ConstellationCrater
Right ascension 11h 56m 07.4552s[3]
Declination−19° 53′ 45.193″[3]
Redshift0.005747±0.0000130[3]
Helio radial velocity1,723±4 km/s[3]
Distance65 Mly (19.9 Mpc)[2]
Group or clusterNGC 4038 Group
Apparent magnitude (B)11.75[2]
Characteristics
TypeSA(rs)bc[3]
Size~269,200 ly (82.55 kpc)[3] (estimated)
Apparent size (V)5.2′ × 2.3′[3]
Other designations
ESO 572- G 020, Arp 289, MCG-03-31-001, PGC 037496[3]

NGC 3981 is a large unbarred spiral galaxy located in the constellation Crater.[4] Its velocity with respect to the cosmic microwave background is 2,078±25 km/s, which corresponds to a Hubble distance of 100.0 ± 7.1 Mly (30.65 ± 2.18 Mpc).[3] However, 14 non-redshift measurements give a closer mean distance of 67.54 ± 3.00 Mly (20.707 ± 0.920 Mpc).[5] It was discovered by German-British astronomer William Herschel on February 7, 1785.[6][7]

NGC 3981 is a member of the NGC 4038 Group[8][9][10][11] which is part of the Virgo Supercluster.[9][12]

See also

References

  1. ↑ "The Unfurling Spiral Arms of NGC 3981". https://noirlab.edu/public/images/iotw2425a/. 
  2. ↑ 2.0 2.1 2.2 "NGC 3981". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3981. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 "Results for object NGC 3981". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3981. 
  4. ↑ "A Galactic Gem - ESO's FORS2 instrument captures stunning details of spiral galaxy NGC 3981" (in en-US). https://www.eso.org/public/news/eso1830/. 
  5. ↑ "Distance Results for NGC 3981". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3981. 
  6. ↑ Herschel, William (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 76: 457–499. doi:10.1098/rstl.1786.0027. Bibcode: 1786RSPT...76..457H. https://zenodo.org/record/1432282/files/article.pdf. 
  7. ↑ "New General Catalog Objects: NGC 3950 - 3999" (in en-US). https://cseligman.com/text/atlas/ngc39a.htm#3981. 
  8. ↑ R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 978-0-521-35299-4. 
  9. ↑ 9.0 9.1 P., Fouque; E., Gourgoulhon; P., Chamaraux; G., Paturel (May 1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members" (in en). Astronomy and Astrophysics Supplement Series 93: 211. ISSN 0365-0138. Bibcode: 1992A&AS...93..211F. 
  10. ↑ M., Garcia, A. (July 1993). "General study of group membership. II - Determination of nearby groups" (in en). Astronomy and Astrophysics Supplement Series 100: 47. ISSN 0365-0138. Bibcode: 1993A&AS..100...47G. 
  11. ↑ Giuricin, Giuliano; Marinoni, Christian; Ceriani, Lorenzo; Pisani, Armando (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups" (in en). The Astrophysical Journal 543 (1): 178. doi:10.1086/317070. ISSN 0004-637X. Bibcode: 2000ApJ...543..178G. http://stacks.iop.org/0004-637X/543/i=1/a=178. 
  12. ↑ Tully, R. B. (June 1982). "The Local Supercluster" (in en). The Astrophysical Journal 257: 389–422. doi:10.1086/159999. ISSN 0004-637X. Bibcode: 1982ApJ...257..389T. 

Coordinates: Sky map 11h 56m 07.4552s, −19° 53′ 45.193″



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