HD 224693
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Cetus |
| Right ascension | 23h 59m 53.83s[1] |
| Declination | −22° 25′ 41.2″[1] |
| Apparent magnitude (V) | +8.23 |
| Characteristics | |
| Spectral type | G2IV |
| U−B color index | ? |
| B−V color index | ? |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | +1.5 km/s |
| Proper motion (μ) | RA: 148.49 ± 0.88[1] mas/yr Dec.: 27.37 ± 0.43[1] mas/yr |
| Parallax (π) | 10.16 ± 0.91[1] mas |
| Distance | 320 ± 30 ly (98 ± 9 pc) |
| Absolute magnitude (MV) | 3.36 |
| Details | |
| Mass | 1.29 ± 0.09[2] M☉ |
| Radius | 1.7 ± 0.3 R☉ |
| Luminosity | 3.91 L☉ |
| Surface gravity (log g) | 4.18 ± 0.06[2] cgs |
| Temperature | 6053 ± 28[2] K |
| Metallicity | 0.28 ± 0.02[2] |
| Rotational velocity (v sin i) | 4.2[3] km/s |
| Age | 3[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 224693 (also known as HIP 118319) is a metal rich[4] yellow subgiant star approximately 320 light-years away[1] in the constellation Cetus.
Planetary system[edit]
In 2006, an extrasolar planet was discovered orbiting HD 224693 by the Keck telescope using radial velocity measurements. A preliminary search for transits using photometric data from Fairborn Observatory was inconclusive because data around the predicted time of transit was too sparse to rule out possible transits.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.71 MJ | 0.192 | 26.73 ± 0.02 | 0.05 ± 0.03 | — | — |
See also[edit]
References[edit]
- ^ a b c d e f 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. Vizier catalog entry - ^ a b c d Santos, N. C.; et al. (2013). "SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs". Astronomy and Astrophysics. 556. A150. arXiv:1307.0354. Bibcode:2013A&A...556A.150S. doi:10.1051/0004-6361/201321286.
- ^ a b Delgado Mena, E.; et al. (April 2015), "Li abundances in F stars: planets, rotation, and Galactic evolution", Astronomy & Astrophysics, 576: 24, arXiv:1412.4618, Bibcode:2015A&A...576A..69D, doi:10.1051/0004-6361/201425433, A69.
- ^ a b c Johnson, John Asher; et al. (2006). "The N2K Consortium. VI. Doppler Shifts without Templates and Three New Short-Period Planets". The Astrophysical Journal. 647 (1): 600–611. arXiv:astro-ph/0604348. Bibcode:2006ApJ...647..600J. doi:10.1086/505173.
External links[edit]
- "Notes for star HD 224693". The Extrasolar Planets Encyclopaedia.
Coordinates: 
23h 59m 53.8329s, −22° 25′ 41.208″
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