Astronomy:NGC 3811

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NGC 3811
NGC 3811 imaged by SDSS
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 11h 41m 16.6161s[1]
Declination+47° 41′ 26.887″[1]
Redshift0.010294±0.000009[1]
Helio radial velocity3,086±3 km/s[1]
Distance152.10 ± 12.53 Mly (46.633 ± 3.843 Mpc)[1]
Apparent magnitude (V)12.9[1]
Characteristics
TypeSB(r)cd[1]
Size~110,600 ly (33.91 kpc) (estimated)[1]
Apparent size (V)2.2′ × 1.7′[1]
Other designations
IRAS 11386+4758, UGC 6650, MCG+08-21-091, PGC 36265[1]

NGC 3811 is a barred spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 3,299±15 km/s, which corresponds to a Hubble distance of 158.7 ± 11.1 Mly (48.65 ± 3.41 Mpc).[1] Additionally, 12 non-redshift measurements give a similar mean distance of 152.10 ± 12.53 Mly (46.633 ± 3.843 Mpc).[2] It was discovered by German-British astronomer William Herschel on 9 February 1788.[3]

NGC 3811 is a starburst galaxy.[1] It is also a galaxy whose nucleus shines in the ultraviolet range, and is thus listed in the Markarian catalogue as Mrk 185.[4]

Supernovae

Two supernovae have been observed in NGC 3811:

  • SN 1969C (type unknown, mag. 12) was discovered by Italian astronomer Leonida Rosino on 9 February 1969, and independently by Jankovits on 11 February 1969.[5][6]
  • SN 1971K (type unknown, mag. 16.1) was discovered by Russian amateur astronomer Piotr Grigor'evich Kulikovsky on 12 June 1971.[7][8]

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 1.11 "Results for object NGC 3811". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3811. 
  2. ↑ "Distance Results for NGC 3811". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3811. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3811". https://cseligman.com/text/atlas/ngc38.htm#3811. 
  4. ↑ Markaryan, B. E. (1969). "Galaxies with an ultraviolet continuum. II". Astrofizika 5: 443. Bibcode: 1969Afz.....5..443M. 
  5. ↑ Rosino, Dr. L. (14 February 1969). "SUPERNOVAE". International Astronomical Union Circular (2134): 1. http://www.cbat.eps.harvard.edu/IAUCs/IAUC2134.jpg. Retrieved 3 August 2025. 
  6. ↑ "SN 1969C". IAU. https://www.wis-tns.org/object/1969C. 
  7. ↑ Martynov, Dr. D. Ya.; Kulikovskij (18 June 1971). "SUPERNOVA IN NGC 3811". International Astronomical Union Circular (2335): 1. http://www.cbat.eps.harvard.edu/IAUCs/IAUC2335.jpg. Retrieved 3 August 2025. 
  8. ↑ "SN 1971K". IAU. https://www.wis-tns.org/object/1971K. 

Coordinates: Sky map 11h 41m 16.6161s, +47° 41′ 26.887″



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