Kappa Aquarii

κ Aquarii
Location of κ Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 37m 45.38049s[1]
Declination −04° 13′ 40.9939″[1]
Apparent magnitude (V) 5.03[2]
Characteristics
Spectral type K2 III[3]
U−B color index +1.16[2]
B−V color index +1.142[4]
Astrometry
Radial velocity (Rv)+7.31 ± 0.16[4] km/s
Proper motion (μ) RA: −69.23[1] mas/yr
Dec.: −119.67[1] mas/yr
Parallax (π)15.25 ± 0.21 mas[1]
Distance214 ± 3 ly
(65.6 ± 0.9 pc)
Absolute magnitude (MV)+0.96[5]
Details
Radius13[4] R☉
Luminosity60[4] L☉
Surface gravity (log g)2.5[4] cgs
Temperature4,581[4] K
Metallicity [Fe/H]+0.14[4] dex
Rotational velocity (v sin i)3.8[4] km/s
Other designations
Situla, 63 Aquarii, BD-04 5716, FK5 1595, HD 214376, HIP 111710, HR 8610, SAO 146210[6]
Database references
SIMBADdata

Kappa Aquarii (κ Aquarii, abbreviated Kappa Aqr, κ Aqr) is a probable binary star in the equatorial constellation of Aquarius. This system is visible to the naked eye, but it is faint at an apparent magnitude of 5.03.[2] Based upon parallax measurements made during the Hipparcos mission, it is around 214 light-years (66 parsecs) from the Sun.[2]

The two components are designated Kappa Aquarii A (formally named Situla /ˈsɪtjuːlə/, the traditional name for the system)[7] and B.

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference aass34_1 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference msom1962 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference aj135_1_209 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 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. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.