Astronomy:55 Andromedae

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Short description: Star in the constellation Andromeda
55 Andromedae
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda
Right ascension  01h 53m 17.34441s[1]
Declination +40° 43′ 47.2538″[1]
Apparent magnitude (V) 5.42[2]
Characteristics
Spectral type K1 III[3]
U−B color index +1.41[4]
B−V color index +1.32[4]
Astrometry
Radial velocity (Rv)−7.59±0.2[5] km/s
Proper motion (μ) RA: −10.073[1] mas/yr
Dec.: −4.483[1] mas/yr
Parallax (π)4.4619 ± 0.1001[1] mas
Distance730 ± 20 ly
(224 ± 5 pc)
Absolute magnitude (MV)−1.00[2]
Details
Luminosity436.43[2] L☉
Surface gravity (log g)2.30[3] cgs
Temperature4,290[3] K
Metallicity [Fe/H]−0.14[3] dex
Other designations
55 And, BD+40° 394, FK5 2124, HD 11428, HIP 8814, HR 543, SAO 37587, PPM 44535, WDS J01533+4044A[6]
Database references
SIMBADdata

55 Andromedae, abbreviated 55 And, is a single,[7] orange-hued star in the northern constellation of Andromeda. 55 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.42.[2] Based upon an annual parallax shift of 4.7 mas,[1] it is located about 730 light years from the Sun. 55 And is moving closer to the Earth with a heliocentric radial velocity of −7.6 km/s.[5] It is a member of the Sirius supercluster.[8]

This is an aging giant star with a stellar classification of K1 III,[3] which indicates it has exhausted the hydrogen supply at its core and evolved away from the main sequence. It is radiating 436[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,290 K.[3] It has a magnitude 10.90 visual companion at an angular separation of 59.00″ along a position angle of 357° from 55 And. In 1828, this separation was just 20.0″.[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series 74: 1075–1128, doi:10.1086/191527, Bibcode: 1990ApJS...74.1075M. 
  4. ↑ 4.0 4.1 Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society 133 (4): 475–493, doi:10.1093/mnras/133.4.475, Bibcode: 1966MNRAS.133..475A. 
  5. ↑ 5.0 5.1 Famaey, B. et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics 430: 165, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F. 
  6. ↑ "55 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=55+And. 
  7. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  8. ↑ Eggen, Olin J. (October 1996), "Star Streams and Galactic Structure", Astronomical Journal 112: 1595, doi:10.1086/118126, Bibcode: 1996AJ....112.1595E. 
  9. ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M. 

External links



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