88 Aquarii

This article is about c2 Aquarii. For other star systems with this Bayer designation, see c Aquarii.
88 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings
Location of 88 Aquarii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquarius
Right ascension 23h 09m 26.79681s[1]
Declination –21° 10′ 20.6812″[1]
Apparent magnitude (V) +3.679[2]
Characteristics
Spectral type K1 III[3]
U−B color index +1.239[2]
B−V color index +1.215[2]
Astrometry
Radial velocity (Rv)+21.1[4] km/s
Proper motion (μ) RA: +55.40[1] mas/yr
Dec.: +30.49[1] mas/yr
Parallax (π)12.05 ± 0.22 mas[1]
Distance271 ± 5 ly
(83 ± 2 pc)
Details
Radius29[5] R☉
Surface gravity (log g)2.34[6] cgs
Temperature4,430[6] K
Metallicity [Fe/H]–0.24[6] dex
Other designations
BD-21°6368, FK5 873, HD 218594, HIP 114341, HR 8812, SAO 191683.[7]
Database references
SIMBADdata

88 Aquarii (abbreviated 88 Aqr) is a star in the equatorial constellation of Aquarius. 88 Aquarii is the Flamsteed designation, though it also bears the Bayer designation c2 Aquarii. In dark conditions it is visible to the naked eye with an apparent visual magnitude of +3.68.[2] Based upon parallax measurements, this star is at a distance of around 271 light-years (83 parsecs) from Earth.[1]

The spectrum of 88 Aquarii matches an evolved giant star with a classification of K1 III.[3] Its measured angular diameter is 3.24 ± 0.20 mas,[8] which, at the estimated distance,[1] yields a physical size of about 29 times the radius of the Sun.[5] The cool, orange hued glow of this star comes from the outer atmosphere's effective temperature of 4,430 K.[6]

  1. ^ a b c d e f g 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 sps1966 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. ^ Cite error: The named reference scfs was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference apjss74 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa431_773 was invoked but never defined (see the help page).