Astronomy:Pr0211

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Pr0211
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas/yr
Dec.: -12.384[1] mas/yr
Parallax (π)5.4387 ± 0.0184[1] mas
Distance600 ± 2 ly
(183.9 ± 0.6 pc)
Details[4]
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[5]
Rotational velocity (v sin i)5.1±0.3 km/s
Age578±12 or 790±30 Myr
Other designations
Pr0211, EPIC 211936827, 2MASS J08421149+1916373, NGC 2632 JC 278[2]
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,[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]

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]

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.[9][10] Pr0211 b and Pr0201 b were discovered in 2012 by Sam Quinn[9][10][3] 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 .[9]

Pr0211 c is a gas giant exoplanet orbiting around Pr0211.[11] Pr0211 c was discovered in 2016 by Luca Malavolta[11][4] 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[4]
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 — —

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "Cl* NGC 2632 JC 278". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Cl%2A+NGC+2632+JC+278. 
  3. ↑ 3.0 3.1 3.2 Quinn, Samuel N.; White, Russel J.; Latham, David W.; Buchhave, Lars A.; Cantrell, Justin R.; Dahm, Scott E.; Fűrész, Gabor; Szentgyorgyi, Andrew H. et al. (2012). "Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster". The Astrophysical Journal 756 (2): L33. doi:10.1088/2041-8205/756/2/L33. Bibcode: 2012ApJ...756L..33Q. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Malavolta, L. et al. (2016), "The GAPS programme with HARPS-N at TNG. XI. Pr 0211 in M 44: the first multi-planet system in an open cluster", Astronomy & Astrophysics 588: A118, doi:10.1051/0004-6361/201527933, Bibcode: 2016A&A...588A.118M 
  5. ↑ 5.0 5.1 Kovács, Géza; Hartman, Joel D.; Bakos, Gáspár Á.; Quinn, Samuel N.; Penev, Kaloyan; Latham, David W.; Bhatti, Waqas; Csubry, Zoltán et al. (2014). "Stellar rotational periods in the planet hosting open cluster Praesepe". Monthly Notices of the Royal Astronomical Society 442 (3): 2081. doi:10.1093/mnras/stu946. Bibcode: 2014MNRAS.442.2081K. 
  6. ↑ Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society 490 (4): 5088–5102. doi:10.1093/mnras/stz2673. Bibcode: 2019MNRAS.490.5088M. 
  7. ↑ "Pr0211". https://exoplanetarchive.ipac.caltech.edu/overview/Pr0211. 
  8. ↑ "Cl* NGC 2632 JC 280". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Cl%2A+NGC+2632+JC+280. 
  9. ↑ 9.0 9.1 9.2 Fazekas, Andrew (2012-09-21). "New Planets Found in Star Cluster - Would Have Dazzling Nights". NATIONAL GEOGRAPHIC. http://news.nationalgeographic.com/news/2012/120920-new-planets-star-cluster-science-space-beehive-exoplanets/. 
  10. ↑ 10.0 10.1 "Planet Pr 0211 b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/pr_0211_b--2604/. Retrieved 2016-04-18. 
  11. ↑ 11.0 11.1 "Planet Pr 0211 c". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/pr_0211_c--2605/. Retrieved 2016-04-18. 



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