NGC 5256

NGC 5256
NGC 5256 as seen through the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension13h 38m 17.5s[1]
Declination+48° 16′ 37″[1]
Redshift0.027863±0.000043[1]
Heliocentric radial velocity8353±13 km/s[1]
Galactocentric velocity8447±13 km/s[1]
Distance420 Mly (129 Mpc)[2]
Characteristics
TypeSAB(nc)P[3]
Apparent size (V)1.20′ × 1.1′[1]
Other designations
UGC 8632, MCG 8-25-31, MK 266, PGC 48192, KCPG 388A, IRAS13362+4831, ZWG 246.21 and 1ZW 67[1]

NGC 5256 is an object that contains two disc galaxies, that are colliding into each other. It is located in the constellation Ursa Major, and was discovered by William Herschel on 12 May 1787. The two nuclei of the galaxies are separated by about 13,000 light-years.[4] The southwest and northeast nuclei have masses of 7×109 M☉ and 10×109 M☉, assuming they orbit around a common center of mass.[2] NGC 5256 is located at about 420 million light-years away from the Earth.[2]

NGC 5256 is also known as Markarian 266 and is one of the Markarian galaxies, included in the Markarian Survey due to its high amount of ultraviolet emission. However, it is also a luminous infrared galaxy (LIRG); most of its energy is emitted in the infrared range.[2]

See also

References

  1. ^ a b c d e f g "Object No. 1 – NGC 5056". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 2 October 2015.
  2. ^ a b c d Mazzarella, J. M.; Iwasawa, K.; Vavilkin, T.; Armus, L.; Kim, D.-C.; Bothun, G.; Evans, A. S.; Spoon, H. W. W.; Haan, S.; Howell, J. H.; Lord, S.; Marshall, J. A.; Ishida, C. M.; Xu, C. K.; Petric, A.; Sanders, D. B.; Surace, J. A.; Appleton, P.; Chan, B. H. P.; Frayer, D. T.; Inami, H.; Khachikian, E. Ye.; Madore, B. F.; Privon, G. C.; Sturm, E.; U, Vivian; Veilleux, S. (2012). "Investigation of Dual Active Nuclei, Outflows, Shock-Heated Gas, and Young Star Clusters in Markarian 266". The Astronomical Journal. 144 (5): 125. arXiv:1208.3248. Bibcode:2012AJ....144..125M. doi:10.1088/0004-6256/144/5/125. S2CID 30624108.
  3. ^ "Revised NGC Data for NGC 5056". Seds. Retrieved 2 October 2015.
  4. ^ "NGC 5256; Seyfert 2 + LINER". NASA/IPAC extragalactic database. Retrieved 2 October 2015.


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