Astronomy:55 Andromedae

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Short description: Star in the constellation Andromeda
55 Andromedae
Location of 55 Andromedae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  01h 53m 17.34433s[2]
Declination +40° 43′ 47.2455″[2]
Apparent magnitude (V) 5.42[1]
Characteristics
Evolutionary stage red giant branch[2]
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: −10.028[2] mas/yr
Dec.: −3.966[2] mas/yr
Parallax (π)4.4983 ± 0.0761[2] mas
Distance730 ± 10 ly
(222 ± 4 pc)
Absolute magnitude (MV)−1.00[1]
Details
Mass5.0[2] M☉
Radius37[6] R☉
Luminosity492[6] L☉
Surface gravity (log g)1.58[7] cgs
Temperature4,348[7] K
Metallicity [Fe/H]−0.14[3] dex
Age323[7] Myr
Other designations
55 And, BD+40°394, FK5 2124, HD 11428, HIP 8814, HR 543, SAO 37587, PPM 44535, WDS J01533+4044A[8]
Database references
SIMBADdata

55 Andromedae, abbreviated 55 And, is a single,[9] 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.[1] Based upon an annual parallax shift of 4.5 mas,[2] 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.[10]

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 492 times the Sun's luminosity[6] from its enlarged photosphere at an effective temperature of 4,348 K.[7] 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″.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 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 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. ↑ 3.0 3.1 3.2 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. ↑ 6.0 6.1 6.2 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F. 
  7. ↑ 7.0 7.1 7.2 7.3 Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A. et al. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics 669: A104. doi:10.1051/0004-6361/202244283. Bibcode: 2023A&A...669A.104K. 
  8. ↑ "55 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=55+And. 
  9. ↑ 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. 
  10. ↑ Eggen, Olin J. (October 1996), "Star Streams and Galactic Structure", Astronomical Journal 112: 1595, doi:10.1086/118126, Bibcode: 1996AJ....112.1595E. 
  11. ↑ 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. 



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