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] |
| Characteristics | |
| Spectral type | K0III[3] |
| U−B color index | +0.81[2] |
| B−V color index | +0.99[2] |
| Astrometry | |
| 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 |
| Distance | 267 ± 8 ly (82 ± 2 pc) |
| Details | |
| Radius | 10[4] R☉ |
| Luminosity | 44[4] L☉ |
| Surface gravity (log g) | 2.7[4] cgs |
| Temperature | 4,753[4] K |
| Metallicity [Fe/H] | −0.25[4] dex |
| Rotational velocity (v sin i) | 0.0[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
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]
References
- 1 2 3 4 5 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doi:10.1051/0004-6361:20078357 - 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- 1 2 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:1988MSS...C04....0H
- 1 2 3 4 5 6 7 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
- ↑ 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
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