HD 222399
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 40m 02.81727s[1] |
| Declination | +37° 39′ 09.5055″[1] |
| Apparent magnitude (V) | 6.57[2] |
| Characteristics | |
| Spectral type | F2IV[3] |
| U−B color index | +0.10[2] |
| B−V color index | +0.35[2] |
| Astrometry | |
| Radial velocity (Rv) | −21.0±0.6[4] km/s |
| Proper motion (μ) | RA: −7.88±0.41[1] mas/yr Dec.: −81.27±0.33[1] mas/yr |
| Parallax (π) | 11.01 ± 0.41[1] mas |
| Distance | 300 ± 10 ly (91 ± 3 pc) |
| Details | |
| Mass | 1.77[5] M☉ |
| Surface gravity (log g) | 3.78[5] cgs |
| Metallicity [Fe/H] | −0.04[5] dex |
| Rotational velocity (v sin i) | 55[6] km/s |
| Age | 1.4[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
HD 222399 is a double star in the northern constellation of Andromeda. The magnitude 6.57[2] primary is an F-type subgiant star with a stellar classification of F2IV.[3] It has a magnitude 10.57 companion at an angular separation of 14.7″ along a position angle of 162° (as of 2002).[7]
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 4 Danziger, I. J.; Dickens, R. J. (July 1967), "Spectrophotometry of New Short-Period Variable Stars", Astrophysical Journal 149: 55, Bibcode:1967ApJ...149...55D, doi:10.1086/149231
- 1 2 Cowley, Anne; Fraquelli, Dorothy (February 1974), "MK Spectral Types for Some Bright F Stars", Publications of the Astronomical Society of the Pacific 86 (509): 70, Bibcode:1974PASP...86...70C, doi:10.1086/129562.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 3 4 Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics 530 (A138): 21. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276.
- ↑ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
- ↑ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, retrieved 2015-07-22
External links
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