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Star with an exoplanet in the constellation Caelum From Wikipedia, the free encyclopedia
HD 30669 is a yellowish-orange hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 9.11,[2] making it readily visible in small telescopes but not to the naked eye. The object is relatively close at a distance of 188 light years, based on parallax measurements from Gaia DR3.[1] Its distance from the Solar System is rapidly increasing, having a heliocentric radial velocity of 66 km/s.[4]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Caelum |
Right ascension | 04h 48m 28.48538s[1] |
Declination | −28° 25′ 09.4617″[1] |
Apparent magnitude (V) | 9.11±0.01[2] |
Characteristics | |
Spectral type | G8/K0 V[3] |
B−V color index | +0.82[2] |
Astrometry | |
Radial velocity (Rv) | 65.7±0.4[4] km/s |
Proper motion (μ) | RA: +237.591 mas/yr[1] Dec.: +50.927 mas/yr[1] |
Parallax (π) | 17.2896 ± 0.0127 mas |
Distance | 188.6 ± 0.1 ly (57.84 ± 0.04 pc) |
Absolute magnitude (MV) | +5.35[5] |
Details | |
Mass | 0.92±0.03[6] M☉ |
Radius | 0.91±0.04[7] R☉ |
Luminosity | 59.7%[8] L☉ |
Surface gravity (log g) | 4.43±0.06[9] cgs |
Temperature | 5,353±100[9] K |
Metallicity [Fe/H] | +0.13[10] dex |
Rotational velocity (v sin i) | <1.7[7] km/s |
Age | 7.25±4.64[11] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 30669 has a stellar classification of G8/K0 V[3] — a main sequence star with the characteristics of a star with a class of G8 and K0. It has alternatively been given a class of G9 V. It has 92% the mass of the Sun[6] and 91% its radius.[7] The object radiates 59.7% the luminosity of the Sun[8] from its photosphere at an effective temperature of 5,353 K[9] from its photosphere. Like most planetary hosts, HD 30669 is metal enriched, having a metallicity 35% above solar levels.[10] The star is extremely chromopsherically inactive and is estimated to be 7+1⁄4 billion years old.[11]
In 2015, C. Motou and colleagues discovered a long period exoplanet orbiting the star during a HARPS survey. It has nearly half the mass of Jupiter and it takes over 4+1⁄2 years to revolve HD 30669 in a slightly eccentric orbit.[7]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥0.47±0.06 MJ | 2.69±0.08 | 4.614±0.167 | 0.18±0.15 | — | — |
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