Astronomy:64 Andromedae

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Short description: G-type giant star in the constellation Andromeda
64 Andromedae
Location of 64 Andromedae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  02h 24m 24.91599s[2]
Declination +50° 00′ 23.5560″[2]
Apparent magnitude (V) 5.19[3]
Characteristics
Evolutionary stage red giant branch[2]
Spectral type G8III[4]
U−B color index +0.753[5]
B−V color index +0.973[5]
Astrometry
Radial velocity (Rv)–13.63[2] km/s
Proper motion (μ) RA: +24.618±0.089[2] mas/yr
Dec.: −36.335±0.117[2] mas/yr
Parallax (π)8.0682 ± 0.0972[2] mas
Distance404 ± 5 ly
(124 ± 1 pc)
Absolute magnitude (MV)−0.25[1]
Details
Mass3.12±0.19[6] M☉
Radius15.90±0.56[6] R☉
Luminosity135.6±8.8[6] L☉
Surface gravity (log g)2.55±0.05[6] cgs
Temperature4,944±33[6] K
Metallicity [Fe/H]−0.03±0.10[6] dex
Rotational velocity (v sin i)0.69[7] km/s
Age350±60[6] Myr
Other designations
64 And, BD+49°649, HD 14770, HIP 11220, HR 694, SAO 38005, PPM 27578[8]
Database references
SIMBADdata

64 Andromedae, abbreviated 64 And, is a single[9] star in the northern constellation of Andromeda. With a spectral type G8III, it is a deep-yellow coloured G-type giant approximately 404 light years from Earth with an apparent magnitude of 5.19.[2] The star is moving closer to the Earth with a heliocentric radial velocity of –13.6 km/s.[2]

This star is estimated to be 350 million years old[6] with a negligible rotation rate, showing a projected rotational velocity of 0.69 km/s.[7] It has a little more than 3 times the mass of the Sun and has expanded to 16 times the Sun's radius.[6] 64 And is radiating 136 times the luminosity of the Sunfrom its enlarged photosphere at an effective temperature of 4,944 K[6]

Position and chosen constellation

As to the faint triangle and context in which the star figures see 63 Andromedae.

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Stellar Photometry in Johnson's 11-color system (Ducati, 2002)". Vizier Online Data Catalog. Bibcode: 2002yCat.2237....0D. 
  4. ↑ Roman, Nancy G. (1952). "The Spectra of the Bright Stars of Types F5-K5". The Astrophysical Journal 116: 122. doi:10.1086/145598. Bibcode: 1952ApJ...116..122R. 
  5. ↑ 5.0 5.1 "Homogeneous Means in the UBV System (Mermilliod 1991)". https://cdsarc.cds.unistra.fr/viz-bin/ReadMe/II/168?format=html&tex=true. 
  6. ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 Reffert, S.; Bergmann, C.; Quirrenbach, A.; Trifonov, T.; Künstler, A. (2016), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics 574: 13, doi:10.1051/0004-6361/201322360, A116, Bibcode: 2015A&A...574A.116R. 
  7. ↑ 7.0 7.1 Hekker, S.; Meléndez, J. (December 2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy & Astrophysics 475 (3): 1003–1009, doi:10.1051/0004-6361:20078233, Bibcode: 2007A&A...475.1003H. 
  8. ↑ "64 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=64+And. 
  9. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 



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