K2-288

K2-288
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 03h 41m 46.43s[1]
Declination +18° 16′ 08.0″[1]
Characteristics
Spectral type M2 V[1] + M3 V[1]
Orbit[1]
PrimaryK2-288 A
CompanionK2-288 B
Semi-major axis (a)55 AU
Details[1]
K2-288 A
Mass0.52±0.02 M☉
Radius0.45±0.03 R☉
Surface gravity (log g)4.85±0.03 cgs
Temperature3584±205 K
Metallicity [Fe/H]−0.29±0.09 dex
K2-288 B
Mass0.33±0.02 M☉
Radius0.32±0.03 R☉
Surface gravity (log g)4.96±0.02 cgs
Temperature3341±276 K
Metallicity [Fe/H]−0.21±0.09 dex
Database references
SIMBADdata

K2-288 is a binary star system consisting of two red dwarfs. The companion star, K2-288B, is known to host a single planet, K2-288Bb.

Planetary System

See also: K2-288Bb

In January 2019, it was announced that a team of citizen scientists had discovered a planet orbiting K2-288B.[1]

The K2-288 planetary system[1]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b — 0.164 ± 0.03 31.393463+0.000067
−0.000069 		— 89.81+0.13
−0.17° 		1.90 ± 0.3 R🜨

See also

  • Kepler 296, similar red dwarf binary with exoplanets

References

  1. ^ a b c d e f g h Feinstein, Adina D.; et al. (7 January 2019). "K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists" (PDF). The Astronomical Journal. 157 (2): 40. arXiv:1902.02789. Bibcode:2019AJ....157...40F. doi:10.3847/1538-3881/aafa70. hdl:1721.1/121222.