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45 Aquarii

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45 Aquarii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aquarius
Right ascension 22h 19m 00.741s[1]
Declination −13° 18′ 17.97″[1]
Apparent magnitude (V) 5.96[2]
Characteristics
Spectral type K0 III[3]
B−V color index 1.075±0.004[2]
Astrometry
Radial velocity (Rv)+30.0±2.9[2] km/s
Proper motion (μ) RA: +73.431 mas/yr[1]
Dec.: −8.823 mas/yr[1]
Parallax (π)9.8323 ± 0.0438 mas[1]
Distance332 ± 1 ly
(101.7 ± 0.5 pc)
Absolute magnitude (MV)0.69[2]
Details
Radius10.42+0.38
−1.46[4] R☉
Luminosity49.8±0.6[4] L☉
Temperature4750±374[4] K
Other designations
45 Aqr, BD−14°6255, GC 31199, HD 211676, HIP 110179, HR 8508, SAO 164996[5]
Database references
SIMBADdata

45 Aquarii is a star in the zodiac constellation of Aquarius. 45 Aquarii is its Flamsteed designation. It has an apparent visual magnitude of 5.96,[2] which is bright enough to be dimly visible to the naked eye. The distance to this star is 332 light years based on parallax measurements, and it is drifting further away with a heliocentric radial velocity of +30 km/s.[2]

The stellar classification of 45 Aquarii is K0 III,[3] matching an evolved K-type giant star that has consumed the hydrogen at its core and expanded. It has an estimated 10 times the radius of the Sun and is radiating 50 times the Sun's luminosity at an effective temperature of 4,750 K.[4]

References

[edit]
  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c d e f Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  3. ^ a b Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
  4. ^ a b c d 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.
  5. ^ "45 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-16.


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