103 Aquarii

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 article is about A1 Aquarii. For A2 Aquarii, see 104 Aquarii. For all stars with the same Bayer designation, see A Aquarii.
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[1] mas
Distance700 ± 30 ly
(213 ± 9 pc)
Details
Radius63.58+0.54
−0.99[1] R☉
Luminosity848.285±41.525[1] L☉
Surface gravity (log g)1.59[5] cgs
Temperature3,910[5] K
Metallicity [Fe/H]–0.18[5] dex
Other designations
103 Aqr, BD−18°6357, HD 222547, HIP 116889, HR 8980, SAO 165834[6]
Database references
SIMBADdata

This is classified as an 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
  1. 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.
  2. 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.
  3. 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, Ann Arbor: Dept. of Astronomy, University of Michigan, 4, Bibcode:1988mcts.book.....H.
  4. Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Washington, Carnegie Institute of Washington, D.C.: 0, Bibcode:1953GCRV..C......0W.
  5. 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.
  6. "103 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-20.
  7. 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.
  8. 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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.