HD 222093

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HD 222093
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 37m 39.55961s[1]
Declination −13° 03′ 36.8646″[1]
Apparent magnitude (V) 5.68[2]
Spectral type K0III[3]
U−B color index +0.81[2]
B−V color index +0.99[2]
Radial velocity (Rv)−12.53±0.27[4] km/s
Proper motion (μ) RA: +34.33[1] mas/yr
Dec.: +27.04[1] mas/yr
Parallax (π)12.21 ± 0.37[1] mas
Distance267 ± 8 ly
(82 ± 2 pc)
Radius10[4] R
Luminosity44[4] L
Surface gravity (log g)2.7[4] cgs
Temperature4,753[4] K
Metallicity [Fe/H]−0.25[4] dex
Rotational velocity (v sin i)0.0[4] km/s
Other designations
BD-13° 6439, HD 222093, HIP 116591, HR 8958, SAO 165804.
Database references
Database references

HD 222093 is a sixth magnitude double star in the equatorial constellation of Aquarius. The primary component is a K-type giant star with a stellar classification of K0III.[3] Most likely this is a wide binary star system; the companion is a magnitude 9.6 star at an angular separation of 33.1 from the primary.[5]


  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
  2. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
  3. ^ a b Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H
  4. ^ a b c d e f g Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209
  5. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.

External links[edit]