Astronomy:45 Aquarii
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Short description: Star in the constellation Aquarius
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| 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[1] mas/yr Dec.: −8.823[1] mas/yr |
| Parallax (π) | 9.8323 ± 0.0438[1] mas |
| Distance | 332 ± 1 ly (101.7 ± 0.5 pc) |
| Absolute magnitude (MV) | 0.69[2] |
| Details | |
| Radius | 10.42+0.38 −1.46[4] R☉ |
| Luminosity | 49.8±0.6[4] L☉ |
| Temperature | 4750±374[4] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 1.1 1.2 1.3 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H.
- ↑ 4.0 4.1 4.2 4.3 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. Gaia DR2 record for this source at VizieR.
- ↑ "45 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=45+Aqr.
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