Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
---|---|
Constellation | Cancer |
Right ascension | 08h 32m 16.1124s[1] |
Declination | +11° 37′ 50.5893″[1] |
Apparent magnitude (V) | 14.64±0.06[2] |
Characteristics | |
Spectral type | K3 V[3] |
B−V color index | +1.00[2] |
R−I color index | +0.28[2] |
Variable type | Planetary transit[4] |
Astrometry | |
Proper motion (μ) | RA: −9.507[1] mas/yr Dec.: −2.164[1] mas/yr |
Parallax (π) | 2.235 ± 0.0232[1] mas |
Distance | 1,460 ± 20 ly (447 ± 5 pc) |
Details | |
Mass | 0.96+0.44−0.30[5] M☉ |
Radius | 0.72+0.09−0.01[3] R☉ |
Luminosity | 0.304[6] L☉ |
Surface gravity (log g) | 4.68±0.15[5] cgs |
Temperature | 4952±122[6] K |
Metallicity [Fe/H] | −0.11±0.23[5] dex |
Rotational velocity (v sin i) | 3.2[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
Extrasolar Planets Encyclopaedia | data |
K2-371 (EPIC 211399359) is a star in the equatorial zodiac constellation Cancer. It has an apparent magnitude of 14.64, requiring a powerful telescope to be seen. Parallax measurements place the object at a distance of 1,460 light years.
K2-371 has a stellar classification of K3 V,[3] indicating that it is an ordinary K-type main-sequence star. It has 96% the mass of the Sun[5] and 72% the radius of the Sun.[5] It shines with a luminosity 30.4% that of the Sun[6] from its photosphere at an effective temperature of 4,952 K,[6] giving an orange hue. Unlike most planetary hosts, K2-371 is slightly metal deficent with a poorly constrained iron abundance 77% that of the Sun,[5] and spins modestly with a projected rotational velocity of 3.2 km/s.[7]
In 2016, K2-371 was selected as a target for exoplanets. A group of astronomers happened to find a hot Jupiter orbiting the star with a period of 3.115 days.[8] Unlike most transiting planets, K2-371b's orbital eccentricity and inclination is unknown.[5]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (unconfirmed) | — | 0.08518[5] | 3.115[8] | — | — | 1.16±0.08[5] RJ |