HD 167042
HD 167042 is a 6th magnitude K-type subgiant star located approximately 164 light-years away in Draco constellation. It has mass of 1.88 times that of the Sun and the age is only 1.8 billion years old. When this star was a main sequence, it was white mid to late A-type star based on its mass.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Draco |
| Right ascension | 18h 10m 31.64008s[1] |
| Declination | +54° 17′ 11.5922″[1] |
| Apparent magnitude (V) | +5.97[2] |
| Characteristics | |
| Spectral type | K1 IV[2] |
| U−B color index | +0.716[3] |
| B−V color index | +0.934[3] |
| Astrometry | |
| Radial velocity (Rv) | −17.88[4] km/s |
| Proper motion (μ) | RA: +107.94[1] mas/yr Dec.: +247.35[1] mas/yr |
| Parallax (π) | 19.91 ± 0.26 mas[1] |
| Distance | 164 ± 2 ly (50.2 ± 0.7 pc) |
| Details[2] | |
| Mass | 1.88±0.07 M☉ |
| Radius | 5.70±0.10 R☉ |
| Luminosity | 12.47±0.54 L☉ |
| Surface gravity (log g) | 3.2±0.1 cgs |
| Temperature | 4,547±49 K |
| Metallicity [Fe/H] | −0.1 dex |
| Rotational velocity (v sin i) | 0.68[4] km/s |
| Age | 1.82±5.23 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
On 28 November 2007, a preprint of the discovery of the planet HD 167042 b was posted to the arXiv server. The peer reviewed paper was then published in The Astrophysical Journal on 1 March 2008.[6] The discovery was later independently confirmed.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.7 MJ | 1.30 | 412.6 ± 4 | 0.027 ± 0.04 | — | — |
References
- 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, S2CID 18759600.
- Ligi, R.; et al. (February 2016), "Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters", Astronomy & Astrophysics, 586: 23, arXiv:1511.03197, Bibcode:2016A&A...586A..94L, doi:10.1051/0004-6361/201527054, S2CID 15941645, A94.
- Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172 (3): 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667.
- Jofré, E.; et al. (2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics, 574: A50, arXiv:1410.6422, Bibcode:2015A&A...574A..50J, doi:10.1051/0004-6361/201424474, S2CID 53666931.
- "HD 167042". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-12.
- Johnson, John Asher; et al. (2008). "Retired A Stars and Their Companions. II. Jovian Planets Orbiting κ CrB and HD 167042". The Astrophysical Journal. 675 (1): 784–789. arXiv:0711.4367. Bibcode:2008ApJ...675..784J. doi:10.1086/526453. S2CID 12367629.
- Sato, Bun'ei; et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan. 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317. S2CID 67841762.
External links
- "Notes for star HD 167042". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-24.
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