HD 231701
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagitta |
| Right ascension | 19h 32m 04.161s[1] |
| Declination | +16° 28′ 27.45″[1] |
| Apparent magnitude (V) | 8.97 |
| Characteristics | |
| Spectral type | F8V |
| Astrometry | |
| Proper motion (μ) | RA: 63.85 ± 0.89[1] mas/yr Dec.: 16.46 ± 0.85[1] mas/yr |
| Parallax (π) | 8.44 ± 1.05[1] mas |
| Distance | approx. 390 ly (approx. 120 pc) |
| Details | |
| Mass | 1.15 ± 0.08[2] M☉ |
| Surface gravity (log g) | 4.37 ± 0.03[2] cgs |
| Temperature | 6224 ± 27[2] K |
| Metallicity [Fe/H] | 0.04 ± 0.02[2] dex |
| Other designations | |
HD 231701 is a yellow-white dwarf star approximately 390 light years away in the constellation of Sagitta. It is a 9th magnitude star, meaning the star is not visible to the naked eye, but powerful binoculars or a small telescope is needed to view the star. It is an F-type main-sequence star, a type of hydrogen-fusing star that is hotter, more massive, and brighter than our Sun.
Planetary system
In 2007, the N2K Consortium used the radial velocity technique to discover a Jupiter-like planet orbiting at 0.55 AU around the star.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.08 MJ | 0.55 | 142 ± 2.8 | 0.19 ± 0.05 | — | — |
See also
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. Vizier catalog entry
- 1 2 3 4 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.
- ↑ "HD 231701 -- Star". SIMBAD Astronomical Database. Centre de données astronomiques de Strasbourg. Retrieved 2014-10-16.
- 1 2 Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal 669 (2): 1336–1344. arXiv:0704.1191. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869.
External links
- "HD 231701". The Extrasolar Planets Encyclopedia.
Coordinates: 
19h 32m 04.1611s, +16° 28′ 27.444″
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