Pr0211

Pr0211
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 42m 11.49887s
Declination +19° 16′ 37.2375″
Apparent magnitude (V) 12.143
Characteristics
Evolutionary stage Main sequence
Spectral type K1V or late G
Apparent magnitude (G) 11.926±0.003
Apparent magnitude (J) 10.660±0.022
Apparent magnitude (H) 10.242±0.019
Apparent magnitude (K) 10.173±0.016
Astrometry
Radial velocity (Rv)35.37±0.42 km/s
Proper motion (μ) RA: -36.820 mas/yr
Dec.: -12.384 mas/yr
Parallax (π)5.4387 ± 0.0184 mas
Distance600 ± 2 ly
(183.9 ± 0.6 pc)
Details
Mass0.935±0.013 M
Radius0.827±0.012 R
Surface gravity (log g)4.51±0.05 cgs
Temperature5300±30 K
Metallicity [Fe/H]0.18±0.02 dex
Rotation7.97 days
Rotational velocity (v sin i)5.1±0.3 km/s
Age578±12 or 790±30 Myr
Other designations
Pr0211, EPIC 211936827, TIC 175291727, 2MASS J08421149+1916373, NGC 2632 JC 278
Database references
SIMBADdata

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, with its spin axis at an inclination of 76°±11° to the plane of the sky. Pr0211 hosts two known exoplanets, and was the first multi-planet system to be discovered in an open cluster.

Pr0211 forms a binary star system with a K-type main-sequence star known as NGC 2632 JC 280 or 2MASS J08421285+1916040.

Planetary system

Pr0211 b is a gas giant exoplanet, specifically a hot Jupiter, orbiting around Pr0211. Pr0211 b along with Pr0201 b are notable for being the first exoplanets discovered in the Beehive Cluster. Pr0211 b and Pr0201 b were discovered in 2012 by Sam Quinn and his colleagues while observing 53 stars in the Beehive Cluster using the 1.5 metres (4.9 ft; 1.6 yd) telescope at the University of Georgia in the United States.

Pr0211 c is a gas giant exoplanet orbiting around Pr0211. Pr0211 c was discovered in 2016 by Luca Malavolta and his colleagues while observing its host star with the HARPS-N spectrograph on the 3.6 metres (12 ft; 3.9 yd) Italian Telescopio Nazionale Galileo (TNG) in La Palma, and the Tillinghast Reflector Echelle Spectrograph (TRES) mounted at the 1.5 metres (4.9 ft; 1.6 yd) telescope at the University of Georgia in the United States.

The Pr0211 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥1.88±0.03 MJ 0.03176±0.00015 2.14610±0.00003 0.011+0.012
−0.008
c ≥7.79±0.33 MJ 5.5+3.0
−1.4
4850+4560
−1750
0.71±0.11

This page was last updated at 2024-03-28 10:40 UTC. Update now. View original page.

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