51 Arietis

Summary

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]

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

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]

References edit

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f Fuhrmann, Klaus (February 2008), "Nearby stars of the Galactic disc and halo - IV", Monthly Notices of the Royal Astronomical Society, 384 (1): 173–224, 176, Bibcode:2008MNRAS.384..173F, doi:10.1111/j.1365-2966.2007.12671.x.
  3. ^ a b c Montes, D.; et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x, S2CID 55727428.
  4. ^ a b c Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725, S2CID 43455849, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04.
  5. ^ a b c d Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics, 530: A138, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, S2CID 56118016.
  6. ^ a b c d e f g Takeda, Yoichi (April 2007), "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database", Publications of the Astronomical Society of Japan, 59 (2): 335–356, Bibcode:2007PASJ...59..335T, doi:10.1093/pasj/59.2.335.
  7. ^ "LTT 10989 -- High proper-motion Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-16.
  8. ^ van Leeuwen, F. (November 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, S2CID 18759600.
  9. ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-01-16

External links edit

  • sky-map.org/
  • Image 51 Arietis