51 Arietis

51 Arietis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 03h 02m 26.02628s[1]
Declination +26° 36′ 33.2602″[1]
Apparent magnitude (V) 6.623 ± 0.005[2]
Characteristics
Spectral type G8 V[3]
B−V color index 0.715[4]
Astrometry
Radial velocity (Rv)+9.5±0.1[5] km/s
Proper motion (μ) RA: +233.122[1] mas/yr
Dec.: –168.438[1] mas/yr
Parallax (π)47.1551 ± 0.0603 mas[1]
Distance69.17 ± 0.09 ly
(21.21 ± 0.03 pc)
Absolute bolometric
magnitude (Mbol)		4.85±0.07[2]
Details
Mass1.04[2] M☉
Radius0.99[2] R☉
Luminosity0.92[6] L☉
Surface gravity (log g)4.46[6] cgs
Temperature5,666[6] K
Metallicity [Fe/H]0.15[6] dex
Rotational velocity (v sin i)4.08[4] km/s
Age1.40[5] Gyr
Other designations
51 Ari, BD+26°503, GJ 120.2, HD 18803, HIP 14150, SAO 75696[7]
Database references
SIMBADdata
ARICNSdata

51 Arietis is a star in the northern constellation of Aries. 51 Arietis is the Flamsteed designation. It is a dim, yellow-hued star – a challenge to view with the naked eye, having an apparent visual magnitude of 6.6.[2] Based upon parallax measurements, the star is located at an estimated distance of 67.3 light-years (20.6 parsecs) from the Sun.[8] It is receding from the Earth with a heliocentric radial velocity of +9.5 km/s,[5] and is a member of the IC 2391 moving group.[3]

This is an ordinary G-type main sequence star with a stellar classification of G8 V.[3] Similar to the Sun, it has 1.04 times the mass and 0.99 times the Sun's radius.[2] It is 1.4[5] billion years old with a leisurely rotation rate, showing a projected rotational velocity of 4 km/s.[4] The atmospheric metallicity is higher than solar.[6] The star radiates 92%[6] of the Sun's luminosity from its photosphere at an effective temperature of 5,666 K.[6] This heat gives it the golden-hued glow of a G-type star.[9]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference mnras384_1_173 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference mnras328_1_45 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference aaa520_A79 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference pasj59_2_335 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference csiro was invoked but never defined (see the help page).