Pr0211
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Pr0211 (sometimes written Pr 0211, also 2MASS J08421149+1916373) is a Sun-like late G or early K-type main-sequence star in the Beehive Cluster, or Praesepe, located 600 light-years away in the constellation Cancer. It is rotationally variable and has a rotation period of 7.97 days,[5] with its spin axis at an inclination of 76°±11° to the plane of the sky.[4] Pr0211 hosts two known exoplanets, and was the first multi-planet system to be discovered in an open cluster.[3][4]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cancer |
Right ascension | 08h 42m 11.49887s[1] |
Declination | +19° 16′ 37.2375″[1] |
Apparent magnitude (V) | 12.143[2] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | K1V[2] or late G[3] |
Apparent magnitude (G) | 11.926±0.003[1] |
Apparent magnitude (J) | 10.660±0.022[2] |
Apparent magnitude (H) | 10.242±0.019[2] |
Apparent magnitude (K) | 10.173±0.016[2] |
Astrometry | |
Radial velocity (Rv) | 35.37±0.42[1] km/s |
Proper motion (μ) | RA: -36.820 mas/yr[1] Dec.: -12.384 mas/yr[1] |
Parallax (π) | 5.4387 ± 0.0184 mas[1] |
Distance | 600 ± 2 ly (183.9 ± 0.6 pc) |
Details[4] | |
Mass | 0.935±0.013 M☉ |
Radius | 0.827±0.012 R☉ |
Surface gravity (log g) | 4.51±0.05 cgs |
Temperature | 5300±30 K |
Metallicity [Fe/H] | 0.18±0.02 dex |
Rotation | 7.97 days[5] |
Rotational velocity (v sin i) | 5.1±0.3 km/s |
Age | 578±12 or 790±30 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Close
Pr0211 forms a binary star system with a K-type main-sequence star known as NGC 2632 JC 280 or 2MASS J08421285+1916040.[6][7][8]