47 Arietis

47 Arietis
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 58m 05.22219s[1]
Declination +20° 40′ 07.4544″[1]
Apparent magnitude (V) 5.80[2]
Characteristics
Spectral type F5 V(e)[3] or F5 IV[4]
U−B color index 0.01[2]
B−V color index 0.41[2]
Astrometry
Radial velocity (Rv)+26.6±0.4[5] km/s
Proper motion (μ) RA: +235.57[1] mas/yr
Dec.: −30.09[1] mas/yr
Parallax (π)30.15 ± 0.30 mas[1]
Distance108 ± 1 ly
(33.2 ± 0.3 pc)
Absolute magnitude (MV)+3.28[6]
Details
Mass1.55[7] M☉
Luminosity4.43[8] L☉
Surface gravity (log g)4.19±0.14[7] cgs
Temperature6,633±226[7] K
Metallicity [Fe/H]+0.09[9] dex
Rotational velocity (v sin i)25[10] km/s
Age2.052[7] Gyr
Other designations
47 Aqr, BD+20° 480, FK5 1081, HD 18404, HIP 13834, HR 878, SAO 75662, WDS J02581+2040A, GSC 1230:1425[11]
Database references
SIMBADdata

47 Arietis is a single[12] star in the northern constellation of Aries. The designation is from the star catalogue of English astronomer John Flamsteed, first published in 1712. It is faintly visible to the naked eye with an apparent visual magnitude of 5.80.[2] It has an annual parallax shift of 30.15 ± 0.30 mas,[1] which is equivalent to a physical distance of approximately 108 light-years (33 parsecs) from Earth.

The star is moving further from the Sun with a radial velocity of +26.6 km/s.[5] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.237 arc seconds per year.[13] The combination of these movements indicate this star is a member of the Hyades supercluster.[14][15]

Li et al. (2000) categorized this as an F-type main-sequence star with a stellar classification of F5 V(e).[3] Previously, Cowley (1976) listed a class of F5 IV, which would indicate it is a subgiant star.[4][15] It is most likely (97.8% chance) the source of X-ray emission that is detected at these coordinates,[16] and it is a radio source.[17] The star has 1.55[7] times the mass of the Sun and is radiating 4.43[8] times the Sun's luminosity from its photosphere at an effective temperature of roughly 6,633 K.[7]

47 Arietis has a red dwarf companion at an angular separation of 14.8 arc seconds along a position angle of 113°, as of 1998. This star has a class of M3.5 and an infrared J-band magnitude of 10.47.[18]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Li2000 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1976 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggen1998 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference David2015 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Mizusaw2012 was invoked but never defined (see the help page).
  11. ^ "47 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-06.
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference deBruijne2001 was invoked but never defined (see the help page).
  15. ^ a b Cite error: The named reference Montes2001 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Haakonsen2009 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Wendker2015 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Scholz2016 was invoked but never defined (see the help page).