66 Aquarii

This article is about g1 Aquarii. For other stars with this Bayer designation, see g Aquarii.
66 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings
Location of 66 Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 43m 35.23307s[1]
Declination –18° 49′ 49.3557″[1]
Apparent magnitude (V) 4.673[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.549[2]
B−V color index +1.376[2]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)+21.6[5] km/s
Proper motion (μ) RA: –31.73[1] mas/yr
Dec.: –28.54[1] mas/yr
Parallax (π)7.53 ± 0.26 mas[1]
Distance430 ± 10 ly
(133 ± 5 pc)
Absolute magnitude (MV)−0.93[6]
Details
Radius37[7] R☉
Luminosity434.08[6] L☉
Surface gravity (log g)2.06[8] cgs
Temperature4,170[8] K
Metallicity [Fe/H]–0.23[8] dex
Rotational velocity (v sin i)10[9] km/s
Other designations
66 Aqr, BD−19° 6324, HD 215167, HIP 112211, HR 8649, SAO 165252[10]
Database references
SIMBADdata

66 Aquarii is a single[11] star in the equatorial constellation of Aquarius. 66 Aquarii is the Flamsteed designation though the star also bears the Bayer designation of g1 Aquarii.[12] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.673.[2] Based upon an annual parallax shift of 7.53 milliarcseconds,[1] the distance to this star is about 430 light-years (130 parsecs).

This is an evolved giant star with a stellar classification of K3 III.[3] It has expanded to 37 times the radius of the Sun[7] and is radiating 434[6] times the luminosity of the Sun from its outer envelope at an effective temperature of 4,170 K.[8] This gives it the orange-hued glow of a K-type star.[13] It is a suspected variable star that ranges in magnitude between 4.66 and 4.71.[4]

  1. ^ a b c d e f 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 mnras172_667 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 ncsvs1998 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference apjss74 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference coapa239_1 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ HD 215167, database record, HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index, N. D. Kostjuk, Institute of Astronomy of Russian Academy of Sciences, 2002; CDS ID IV/27A.
  13. ^ Cite error: The named reference csiro was invoked but never defined (see the help page).