58 Aquarii

58 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 31m 41.31672s[1]
Declination −10° 54′ 19.8148″[1]
Apparent magnitude (V) 6.39[2]
Characteristics
Spectral type A9/F0 V[3] or A8 III[4]
B−V color index 0.290±0.009[2]
Astrometry
Radial velocity (Rv)+4.0±4.3[5] km/s
Proper motion (μ) RA: +77.347[1] mas/yr
Dec.: −52.472[1] mas/yr
Parallax (π)13.4137 ± 0.1535 mas[1]
Distance243 ± 3 ly
(74.6 ± 0.9 pc)
Absolute magnitude (MV)2.12[2]
Details[6]
Mass1.734±0.107 M☉
Radius2.059+0.305
−0.164 R☉
Luminosity11.73[2] L☉
Surface gravity (log g)4.040+0.065
−0.104 cgs
Temperature7,477+377
−528 K
Metallicity [Fe/H]0.014+0.150
−0.120 dex
Rotational velocity (v sin i)30.0±10.0[7] km/s
Age1.086[8] Gyr
Other designations
CD−11° 5855, GC 31468, HD 213464, HIP 111200, HR 8583, SAO 165147[9]
Database references
SIMBADdata

58 Aquarii, abbreviated 58 Aqr, is a star in the constellation of Aquarius. 58 Aquarii is its Flamsteed designation. It is a sixth magnitude star with an apparent visual magnitude of 6.39,[2] which means it is a challenge to view with the naked eye. Based upon an annual parallax shift of 13.4 mas,[1] it is located 243 light years from the Sun. This has been identified as a visual binary system with an orbital period of 829.976 days (2.27 years)[10] in a circular orbit (eccentricity of zero).[11]

The primary component has a stellar classification of A9/F0 V,[3] matching a main sequence star with a spectrum showing mixed traits of an A/F-type. (Cowley and Fraquelli [1974] has previously assigned it a giant star class of A8 III.)[4] It is a chemically peculiar Am star, showing metallic lines with no magnetic field.[7] The star has 1.7 times the mass of the Sun and 2.1 times the Sun's radius. It is radiating 12 times the Sun's luminosity from its photosphere at an effective temperature of 7,477 K.[6]

  1. ^ a b c d e f 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 Houk1999 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1974 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Huber2016 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Paunzen2013 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Abt2004 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Abt2005 was invoked but never defined (see the help page).