103 Aquarii

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 mas[1]
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

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]

  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference mnrassa27_11 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference ajss74_1075 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Kostjuk2002 was invoked but never defined (see the help page).