5 Aquarii

5 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 20h 52m 08.69366s[1]
Declination −05° 30′ 25.4241″[1]
Apparent magnitude (V) 5.55[2]
Characteristics
Spectral type B9 III[3]
B−V color index −0.076±0.010[2]
Astrometry
Radial velocity (Rv)−2.6±0.6[4] km/s
Proper motion (μ) RA: +0.70[5] mas/yr
Dec.: −5.52[5] mas/yr
Parallax (π)3.9834 ± 0.1385 mas[1]
Distance820 ± 30 ly
(251 ± 9 pc)
Absolute magnitude (MV)−0.94[2]
Details
Luminosity317.56[2] L☉
Surface gravity (log g)3.35[6] cgs
Temperature11,200[6] K
Metallicity [Fe/H]0.10[6] dex
Rotational velocity (v sin i)25[7] km/s
Other designations
5 Aqr, NSV 13360, BD−06° 5606, HD 198667, HIP 103005, HR 7985, SAO 144889[8]
Database references
SIMBADdata

5 Aquarii is a single[9] star in the zodiac constellation of Aquarius,[8] located about 830 light years away from the Sun,[1] based on parallax. 5 Aquarii is the Flamsteed designation. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.55.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.[4]

This is a suspected chemically peculiar star[10][6] star with a stellar classification of B9 III,[3] although Adelman et al. (2004) consider it to be a normal star with near-solar elemental abundances.[11] It is relatively sharp-lined[11] with a projected rotational velocity of 25 km/s.[7] The star is radiating 318 times the luminosity of the Sun from its photosphere at an effective temperature of 11,200 K.[6]

  1. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 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 Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Adelman1986 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Adelman2004 was invoked but never defined (see the help page).