HD 27631
HD 27631 is a G-class yellow dwarf star located 164.3 ± 0.3 light-years from Earth.[2] It is smaller and cooler than the Sun, with 0.94 ± 0.04 of its mass and a surface temeperature of 5737±36 K. It is thought to be 4.4 ± 3.6 billion years old.[3]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Horologium |
Right ascension | 04h 19m 45.469s[1] |
Declination | –41° 57′ 36.97″[1] |
Apparent magnitude (V) | +8.26 |
Characteristics | |
Spectral type | G3IV |
Astrometry | |
Proper motion (μ) | RA: –41.229 ± 0.054[2] mas/yr Dec.: –91.988 ± 0.067 [2] mas/yr |
Parallax (π) | 19.8573 ± 0.0323[2] mas |
Distance | 164.3 ± 0.3 ly (50.36 ± 0.08 pc) |
Details | |
Mass | 0.94 ± 0.04 M☉ |
Radius | 1 R☉ |
Luminosity | 0.88 L☉ |
Surface gravity (log g) | 4.48 ± 0.09 cgs |
Temperature | 5737 ± 36 K |
Metallicity [Fe/H] | –0.12 ± 0.05 dex |
Age | 4.4 ± 3.6 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
Extrasolar Planets Encyclopaedia | data |
The survey in 2015 have ruled out the existence of any stellar companions at projected distances above 40 astronomical units.[4]
Planetary system
From 1998 to 2012, the star was under observance from "the CORALIE echelle spectrograph at La Silla Observatory".
In 2012, a long-period, wide-orbiting exoplanet was deduced by radial velocity. This was published in November.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | >1.45 ± 0.14 MJ | 3.25 ± 0.07 | 2208 ± 66 | 0.12 ± 0.06 | — | — |
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.Vizier catalog entry
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Marmier, M.; et al. (2013). "The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets". Astronomy and Astrophysics. 551. A90. arXiv:1211.6444. Bibcode:2013A&A...551A..90M. doi:10.1051/0004-6361/201219639.
- Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly notices of the royal astronomical society. 450 (3). doi:10.1093/mnras/stv771. Retrieved 19 June 2020.
- "hd_27631_b".
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