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Pr0211

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Pr0211
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]
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, TIC 175291727, 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

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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

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  1. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c d e f "Cl* NGC 2632 JC 278". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 December 2023.
  3. ^ a b c Quinn, Samuel N.; White, Russel J.; Latham, David W.; Buchhave, Lars A.; Cantrell, Justin R.; Dahm, Scott E.; Fűrész, Gabor; Szentgyorgyi, Andrew H.; Geary, John C.; Torres, Guillermo; Bieryla, Allyson; Berlind, Perry; Calkins, Michael C.; Esquerdo, Gilbert A.; Stefanik, Robert P. (2012). "Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster". The Astrophysical Journal. 756 (2): L33. arXiv:1207.0818. Bibcode:2012ApJ...756L..33Q. doi:10.1088/2041-8205/756/2/L33. S2CID 118825401.
  4. ^ a b c d e 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, arXiv:1602.00009, Bibcode:2016A&A...588A.118M, doi:10.1051/0004-6361/201527933, S2CID 119207951
  5. ^ a b Kovács, Géza; Hartman, Joel D.; Bakos, Gáspár Á.; Quinn, Samuel N.; Penev, Kaloyan; Latham, David W.; Bhatti, Waqas; Csubry, Zoltán; De Val-Borro, Miguel (2014). "Stellar rotational periods in the planet hosting open cluster Praesepe". Monthly Notices of the Royal Astronomical Society. 442 (3): 2081. arXiv:1405.3728. Bibcode:2014MNRAS.442.2081K. doi:10.1093/mnras/stu946.
  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. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.
  7. ^ "Pr0211". NASA Exoplanet Archive. Retrieved 9 December 2023.
  8. ^ "Cl* NGC 2632 JC 280". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 December 2023.
  9. ^ a b c Fazekas, Andrew (2012-09-21). "New Planets Found in Star Cluster - Would Have Dazzling Nights". National Geographic News. NATIONAL GEOGRAPHIC. Archived from the original on September 23, 2012. Retrieved 2016-05-30.
  10. ^ a b "Planet Pr 0211 b". Extrasolar Planets Encyclopaedia. Retrieved 2016-04-18.
  11. ^ a b "Planet Pr 0211 c". Extrasolar Planets Encyclopaedia. Retrieved 2016-04-18.
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