Ross 47

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Ross 47
Observation data
Epoch J1950.0      Equinox J1950.0
Constellation Orion
Right ascension  05h 42m 09.26772s[1]
Declination +12° 29′ 21.6225″[1]
Apparent magnitude (V) +11.509[2]
Characteristics
Spectral type M4.0Vn
U−B color index +14.264
B−V color index +13.130
Variable type BY Dra[2]
Astrometry
Radial velocity (Rv)105.83 ± 0.18 km/s
Proper motion (μ) RA: 2000.53[1] mas/yr
Dec.: −1569.63[1] mas/yr
Parallax (π)171.55 ± 3.99[1] mas
Distance19.0 ± 0.4 ly
(5.8 ± 0.1 pc)
Absolute magnitude (MV)+12.75
Details
Mass0.35 M
Radius0.17 R
Luminosity0.00069 L
Other designations
V1352 Ori, GJ 213, HIP 26857, Ci 20 344, G 102-22, LFT 425, LHS 31, LTT 11704, NLTT 15489, Ross 47, TYC 722-455-1, 2MASS J05420897+1229252[2]
Database references
SIMBADdata

Ross 47 is a flare star of spectral type M4 located in the constellation Orion, 19 light-years from Earth.[1]

References[edit]

  1. ^ a b c d e f van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ a b c "Ross 47". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 August 2017.