66 Arietis

Last updated
66 Arietis
Observation data
Epoch J2000       Equinox J2000
Constellation Aries
Right ascension 03h 28m 26.56757s [1]
Declination +22° 48′ 14.4335″ [1]
Apparent magnitude  (V)6.03 [2] (6.2/10.4) [3]
Characteristics
Evolutionary stage red giant branch [4] [1]
Spectral type K0 IV [5]
B−V color index 0.964 [6]
Astrometry
Radial velocity (Rv)+48.99±0.16 [6] km/s
Proper motion (μ)RA: +0.833 [1] mas/yr
Dec.: −110.194 [1] mas/yr
Parallax (π)14.1629±0.0361  mas [1]
Distance 230.3 ± 0.6  ly
(70.6 ± 0.2  pc)
Details
66 Ari A
Mass 1.14 [4]   M☉
Radius 6.87 [7]   R☉
Luminosity 22.5 [7]   L☉
Surface gravity (log g)3.00 [7]   cgs
Temperature 4,804 [7]   K
Metallicity [Fe/H]−0.29 [7]   dex
Rotational velocity (v sin i)1.6 [6]  km/s
Age 6.1 [8]   Gyr
Other designations
BD+22°495, HD 21467, HIP 16181, HR 1048, SAO 75945, WDS J03284+2248 [9]
Database references
SIMBAD data

66 Arietis (abbreviated 66 Ari) is a double star [3] in the northern constellation of Aries. 66 Arietis is the Flamsteed designation. It has an apparent visual magnitude of 6.03, [2] putting it near the limit for naked eye visibility. The magnitude 10.4 companion is located at an angular separation of 0.810  arcseconds from the primary along a position angle of 65°. [3] The distance to this pair, as determined from parallax measurements made during the Gaia satellite mission, is approximately 230 light-years (71 parsecs ).

The spectrum of the primary component matches a stellar classification of K0 IV, [5] with the luminosity class of IV indicating this is a subgiant star. It has 6.9 times the radius of the Sun and shines with 22.5 times the Sun's energy. This energy is radiated from the outer atmosphere at an effective temperature of 4,804  K [7] giving it the cool orange-hued glow of a K-type star.

References

  1. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 Oja, T. (September 1993), "UBV photometry of stars whose positions are accurately known. VII", Astronomy and Astrophysics Supplement Series, 100 (3): 591–592, Bibcode:1993A&AS..100..591O.
  3. 1 2 3 Fabricius, C.; Makarov, V. V. (April 2000), "Two-colour photometry for 9473 components of close Hipparcos double and multiple stars", Astronomy and Astrophysics, 356: 141–145, Bibcode:2000A&A...356..141F.
  4. 1 2 Feuillet, Diane K.; Bovy, Jo; Holtzman, Jon; Girardi, Léo; MacDonald, Nick; Majewski, Steven R.; Nidever, David L. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv: 1511.04088 . Bibcode:2016ApJ...817...40F. doi: 10.3847/0004-637X/817/1/40 .
  5. 1 2 Harlan, E. A. (September 1969), "MK classifications for F- and G-type stars. I", Astronomical Journal, 74: 916–919, Bibcode:1969AJ.....74..916H, doi:10.1086/110881.
  6. 1 2 3 Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi: 10.1088/0004-6256/135/1/209 .
  7. 1 2 3 4 5 6 Yu, Jie; Khanna, Shourya; Themessl, Nathalie; Hekker, Saskia; Dréau, Guillaume; Gizon, Laurent; Bi, Shaolan (2023). "Revised Extinctions and Radii for 1.5 Million Stars Observed by APOGEE, GALAH, and RAVE". The Astrophysical Journal Supplement Series. 264 (2): 41. arXiv: 2206.00046 . Bibcode:2023ApJS..264...41Y. doi: 10.3847/1538-4365/acabc8 .
  8. ↑ Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo; Silva Aguirre, Victor; Zamora, Olga (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society. 456 (4): 3655. arXiv: 1511.08203 . Bibcode:2016MNRAS.456.3655M. doi: 10.1093/mnras/stv2830 .
  9. ↑ "* 66 Ari". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2012-08-18.
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