Misplaced Pages

K2-3: Difference between revisions

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Browse history interactively← Previous editNext edit →Content deleted Content addedVisualWikitext
Revision as of 17:38, 29 October 2019 editCitation bot (talk | contribs)Bots5,406,759 editsm Add: author pars. 1-1. Removed URL that duplicated unique identifier. Removed parameters. Some additions/deletions were actually parameter name changes.| You can use this bot yourself. Report bugs here.| Activated by User:Headbomb | via #UCB_Headbomb← Previous edit Revision as of 03:33, 12 February 2020 edit undoTrurle (talk | contribs)Autopatrolled, Extended confirmed users, Pending changes reviewers16,588 edits over-categorizationNext edit →
Line 114: Line 114:
] ]
] ]
]
] ]

Revision as of 03:33, 12 February 2020

K2-3
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 11 29 20.3918
Declination −01° 27′ 17.280″
Apparent magnitude (V) 12.168±0.009
Characteristics
Spectral type M0V
B−V color index 1.35 ± 0.06
Astrometry
Radial velocity (Rv)32.6±1 km/s
Proper motion (μ) RA: 94.034±0.094 mas/yr
Dec.: −78.139±0.057 mas/yr
Parallax (π)22.6610 ± 0.0553 mas
Distance143.9 ± 0.4 ly
(44.1 ± 0.1 pc)
Details
Mass0.601 ± 0.089 M
Radius0.561 ± 0.068 R
Temperature3835±70 K
Metallicity −0.01±0.09 dex
Rotation40±2 d
Age≥1 Gyr
Other designations
EPIC 201367065, 2MASS J11292037-0127173, WISE J112920.45-012718.0
Database references
SIMBADdata

K2-3, also known as EPIC 201367065, is a red dwarf with three known planets. All are Super-Earths, and the outermost is in the habitable zone. It is on the borderline of being a late orange dwarf/K-type star, but because of its temperature, it is classified as a red dwarf (4,000 K is typically the division line between spectral class M and K).

At a distance of about 144 light-years, the star ranks among the top 10 nearest stars known to have transiting planets. The star's proximity means it is bright enough to make it feasible for astronomers to study the planets' atmospheres to determine whether they are like Earth's atmosphere and possibly conducive to life.

Planetary system

K2-3 has at least three confirmed exoplanets:

The K2-3 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 6.6±1.1 M🜨 0.0777+0.0024
−0.0026
10.05454±0.00003 0.06 ± 0.06 89.59+0.24
−0.40°
2.29±0.23 R🜨
c 3.1+1.3
−1.2 M🜨
0.1413+0.0044
−0.0047
24.64638±0.00017 0.04 ± 0.04 89.70 ± 0.20° 1.77±0.18 R🜨
d 2.7+1.2
−0.8 M🜨
0.2097+0.0065
−0.0070
44.55764±0.00042 0.045 ± 0.045 89.79 ± 0.15° 1.65±0.17 R🜨

References

  1. Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
  2. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H.Vizier catalog entry
  4. ^ "K2-3 PLANET HOST OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-17.
  5. ^ Crossfield, Ian J. M.; et al. (2015). "A Nearby M Star with Three Transiting Super-Earths Discovered by K2". The Astrophysical Journal. 804 (1). 10. arXiv:1501.03798. Bibcode:2015ApJ...804...10C. doi:10.1088/0004-637X/804/1/10.
  6. ^ Damasso, M.; Bonomo, A. S.; Astudillo-Defru, N.; Bonfils, X.; Malavolta, L.; Sozzetti, A.; Lopez, E.; Zeng, L.; Haywood, R. D.; Irwin, J. M.; Mortier, A.; Vanderburg, A.; Maldonado, J.; Lanza, A. F.; Affer, L.; Almenara, J.-M.; Benatti, S.; Biazzo, K.; Bignamini, A.; Borsa, F.; Bouchy, F.; Buchhave, L. A.; Cameron, A. C.; Carleo, I.; Charbonneau, D.; Claudi, R.; Cosentino, R.; Covino, E.; Delfosse, X.; Desidera, S. (2018). "Eyes on K2-3: A system of three likely sub-Neptunes characterized with HARPS-N and HARPS". Astronomy and Astrophysics. 615. A69. arXiv:1802.08320. Bibcode:2018A&A...615A..69D. doi:10.1051/0004-6361/201732459. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
  7. Kosiarek, Molly R.; Crossfield, Ian J. M.; Hardegree-Ullman, Kevin K.; Livingston, John H.; Benneke, Björn; Henry, Gregory W.; Howard, Ward S.; Berardo, David; Blunt, Sarah; Fulton, Benjamin J.; Hirsch, Lea A.; Howard, Andrew W.; Isaacson, Howard; Petigura, Erik A.; Sinukoff, Evan; Weiss, Lauren; Bonfils, X.; Dressing, Courtney D.; Knutson, Heather A.; Schlieder, Joshua E.; Werner, Michael; Gorjian, Varoujan; Krick, Jessica; Morales, Farisa Y.; Astudillo-Defru, Nicola; Almenara, J.-M.; Delfosse, X.; Forveille, T.; Lovis, C.; Mayor, M. (2019). "Bright Opportunities for Atmospheric Characterization of Small Planets: Masses and Radii of K2-3 b, c, and d and GJ3470 b from Radial Velocity Measurements and Spitzer Transits". The Astronomical Journal. 157 (3). 97. arXiv:1812.08241. Bibcode:2019AJ....157...97K. doi:10.3847/1538-3881/aaf79c. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)CS1 maint: unflagged free DOI (link)
  8. Three Super-Earths Found Circling Nearby Red Dwarf
K2-3 system
Stars
Planets
2015 in space
Space probe launches Space probes launched in 2015
Space probes
Space observatories
  • DSCOVR (weather satellite; Feb 2015)
  • Astrosat (space telescope; Sep 2015)


Impact events
Selected NEOs
Exoplanets Exoplanets discovered in 2015
Discoveries
Comets Comets in 2015
Space exploration
Constellation of Leo
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Galaxies
Messier
NGC
Numbered
Other
Category
Categories: