HD 27631

HD 27631

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Horologium
Right ascension	04^h 19^m 45.469^s[1]
Declination	–41° 57′ 36.97″[1]
Apparent magnitude (V)	+8.26
Characteristics
Spectral type	G3IV
Astrometry
Proper motion (μ)	RA: –41.29 ± 0.62[1] mas/yr Dec.: –93.32 ± 0.61[1] mas/yr
Parallax (π)	21.98 ± 0.68[1] mas
Distance	148 ± 5 ly (45 ± 1 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
HIP 20199, CD–42 1464
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets Encyclopaedia	data

HD 27631 is a G-class yellow dwarf star.

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 planet was deduced by radial velocity. This was published in November.^[2]

The HD 27631 planetary system^[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

1. 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
2. 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.
3. "hd_27631_b".

External links

• The Extrasolar Planets Encyclopedia: HD 27631