NGC 4800

NGC 4800
Hubble Space Telescope image of NGC 4800
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension12h 54m 37.78208s[1]
Declination+46° 31′ 52.2815″[1]
Redshift0.002972[2]
Heliocentric radial velocity891±17 km/s[2]
Distance95 Mly (29.0 Mpc)[3]
Apparent magnitude (B)12.0[4]
Characteristics
TypeSA(rs)b[5]
Other designations
NGC 4800, LEDA 43931, 2MASX J12543777+4631521[4]

NGC 4800 is an isolated[6] spiral galaxy in the constellation Canes Venatici, located at a distance of 95 megalight-years from the Milky Way.[3] It was discovered by William Herschel on April 1, 1788.[7] The morphological classification of this galaxy is SA(rs)b,[5] indicating a spiral galaxy with no visual bar at the nucleus (SA), an incomplete ring structure (rs), and moderately-tightly wound spiral arms (b). The galactic plane is inclined to the line of sight by an angle of 43°, and the long axis is oriented along a position angle of 25°.[8] There is a weak bar structure at the nucleus that is visible in the infrared.[6]

The galaxy has a low-luminosity active galactic nucleus with an HII region at the core.[5] The circumnuclear zone contains a double ring structure of "ultra-compact nuclear rings"; the inner ring has a radius of 30 pc and the outer ring's radius is about 130 pc.[6] The upper limit on the mass of the central supermassive black hole is estimated as 2.0×107 M☉, or 20 million times the mass of the Sun.[9]

  1. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference ned was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Sorce2014 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Delgado2004 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Comerón2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference cseligman was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Ho2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Sarzi2002 was invoked but never defined (see the help page).