Eisspeedway

NGC 4707

NGC 4707
NGC 4707, imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension12h 48m 21.666s[1]
Declination+51° 09′ 53.81″[1]
Redshift0.001561[2]
Heliocentric radial velocity468 km/s[2]
Distance22.11 ± 3.64 Mly (6.780 ± 1.116 Mpc)[2]
Apparent magnitude (V)12.91[2]
Apparent magnitude (B)15.2[3]
Absolute magnitude (V)-16.23[2]
Characteristics
TypeSm/Im[3]
Size16,100 ly (4,930 pc)[2]
Apparent size (V)1.120′ × 1.045′[3]
Other designations
UGC 7971, MCG+09-21-050, PGC 43255, DDO 150[3]

NGC 4707 is an irregular galaxy in the constellation of Canes Venatici. It was discovered by John Herschel on 5 June 1834,[4] and described by John Louis Emil Dreyer, the compiler of the New General Catalogue, as a "small, stellar" galaxy.[5]

NGC 4707 has a morphological type of Sm or Im, meaning that it is mostly irregular or has very weak spiral arms.[3] The galaxy was imaged by the Hubble Space Telescope in 2016. The image showed the galaxy had little to no signs of a central bulge or any prominent structures (typical of Magellanic-type spirals). However, the telescope could resolve many stars, as well as several turquoise-colored star forming regions.[6]

  • NGC 4707 by GALEX
    NGC 4707 by GALEX
  • NGC 4707 (SDSS DR14)
    NGC 4707 (SDSS DR14)

References

  1. ^ a b Adelman-McCarthy, J. K.; et al. (2009). "VizieR Online Data Catalog: The SDSS Photometric Catalog, Release 7". VizieR On-line Data Catalog. Bibcode:2009yCat.2294....0A.
  2. ^ a b c d e f "NED results for object NGC 4707". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 20 February 2017.
  3. ^ a b c d e "NGC 4707". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  4. ^ Seligman, Courtney. "New General Catalogue objects: NGC 4700 - 4749". cseligman.com. Retrieved 20 February 2017.
  5. ^ "NGC 4707 - SEDS". Retrieved 20 February 2017.
  6. ^ "Astro-pointillism | ESA/Hubble". www.spacetelescope.org. 2016. Retrieved 20 February 2017.
  • Media related to NGC 4707 at Wikimedia Commons


Quelle: https://en.wikipedia.org/wiki/NGC_4707