NGC 4650A

NGC 4650A is a polar-ring[2] lenticular[1] galaxy located in the constellation Centaurus. It should not be confused with the spiral galaxy NGC 4650, which shares almost the same radial distance as NGC 4650A. The real distance between both galaxies is only about 6 times the optical radius of NGC 4650.[4]

NGC 4650A
A Hubble Space Telescope (HST) image of NGC 4650A
Observation data (J2000 epoch)
ConstellationCentaurus
Right ascension 12h 44m 49.0s[1]
Declination−40° 42′ 52″[1]
Redshift2880 ± 3 km/s[1]
Apparent magnitude (V)13.9[1]
Characteristics
TypeS0/a pec [1] / Polar-ring galaxy[2][3]
Apparent size (V)1′.6 × 0′.8[1]
Other designations
PGC 42951[1]

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 4650A. Retrieved 2007-03-30.
  2. J. L. Sérsic (1967). "Southern Peculiar Galaxies III". Zeitschrift für Astrophysik. 67: 306–311. Bibcode:1967ZA.....67..306S.
  3. B. C. Whitmore; D. B. McElroy; F. Schweizer (1987). "The shape of the dark halo in polar-ring galaxies". Astrophysical Journal. 314: 439–456. Bibcode:1987ApJ...314..439W. doi:10.1086/165077.
  4. Formation of polar ring galaxies, F. Bournaud, F. Combes, Observatoire de Paris, LERMA, École Normale Supérieure. Accessed on line July 10, 2008.
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