103 Aquarii
| Observation data Epoch J2000.0 (ICRS) Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 41m 34.48893s[1] |
| Declination | −18° 01′ 37.4656″[1] |
| Apparent magnitude (V) | 5.34[2] |
| Characteristics | |
| Spectral type | K4/K5 III[3] |
| B−V color index | +1.57[2] |
| Astrometry | |
| Radial velocity (Rv) | +25.1[4] km/s |
| Proper motion (μ) | RA: –41.665[1] mas/yr Dec.: –71.428[1] mas/yr |
| Parallax (π) | 4.6918 ± 0.2010 mas[1] |
| Distance | 700 ± 30 ly (213 ± 9 pc) |
| Details | |
| Radius | 63.58+0.54 −0.99[1] R☉ |
| Luminosity | 848.285±41.525[1] L☉ |
| Surface gravity (log g) | 1.59[5] cgs |
| Temperature | 3,910[5] K |
| Metallicity [Fe/H] | –0.18[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
103 Aquarii is a single[7] star in the equatorial constellation of Aquarius. 103 Aquarii is the Flamsteed designation, although it also bears the Bayer designation A1 Aquarii.[8] It is faint but visible to the naked eye as an orange hued star with an apparent visual magnitude of 5.34.[2] Based upon an annual parallax shift of 4.69 mas, the distance to this star is around 700 light-years (210 parsecs).[1] It is moving away from the Earth with a heliocentric radial velocity of +25 km/s.[4]
This is classified as a K-type giant star,[3] having evolved off the main sequence after exhausting the hydrogen at its core and expanded to 64[1] times the Sun's radius. The star is radiating 848[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,910 K.[5]
References
- ^ a b c d e f g h i j 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.
- ^ a b c Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- ^ a b Houk, Nancy; Smith-Moore, M. (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
- ^ a b Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Washington, Carnegie Institute of Washington, D.C.: 0, Bibcode:1953GCRV..C......0W.
- ^ a b c d McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants". Astrophysical Journal Supplement Series. 74: 1075–1128. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527.
- ^ "103 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-20.
- ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Kostjuk, N. D. (2002), "HD 222547", database record, HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index, Institute of Astronomy of Russian Academy of Sciences, retrieved 2019-05-20.; CDS ID IV/27A.
