Discovery | |
---|---|
Discovered by | Marshall Johnson et al.[1] |
Discovery site | KELT |
Discovery date | 2018 |
Transit method | |
Orbital characteristics | |
0.05224 AU (7,815,000 km) | |
3.6127647[1] d | |
Inclination | 86.46[1] |
Star | KELT-21 A (HD 332124) |
Physical characteristics | |
1.586[1] RJ | |
Mass | <3.91[1] MJ |
Mean density | <1.24 g cm−3 |
Temperature | 2051[1] |
KELT-21b is an extrasolar planet discovered in 2018. It is a hot Jupiter with radius of about 1.586 MJ.[1]
KELT-21b orbits KELT-21 A (HD 332124). It is likely the primary star in a triple star system, with the two stars located 1.2 arcseconds away. These two stars, designated KELT-21 B and C, have masses of 0.13 M☉ and 0.11 M☉, respectively.[1]
References
edit- ^ a b c d e f g h Johnson, Marshall C; Rodriguez, Joseph E; Zhou, George; Gonzales, Erica J; Cargile, Phillip A; Crepp, Justin R; Penev, Kaloyan; Stassun, Keivan G; Gaudi, B. Scott; Colón, Knicole D; Stevens, Daniel J; Strassmeier, Klaus G; Ilyin, Ilya; Collins, Karen A; Kielkopf, John F; Oberst, Thomas E; Maritch, Luke; Reed, Phillip A; Gregorio, Joao; Bozza, Valerio; Novati, Sebastiano Calchi; d'Ago, Giuseppe; Scarpetta, Gaetano; Zambelli, Roberto; Latham, David W; Bieryla, Allyson; Cochran, William D; Endl, Michael; Tayar, Jamie; et al. (2018). "KELT-21b: A Hot Jupiter Transiting the Rapidly Rotating Metal-poor Late-A Primary of a Likely Hierarchical Triple System". The Astronomical Journal. 155 (2): 100. arXiv:1712.03241. Bibcode:2018AJ....155..100J. doi:10.3847/1538-3881/aaa5af. S2CID 73559090.
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Category:Transiting exoplanets Category:Giant planets Category:Exoplanets discovered in 2018 Category:Virgo (constellation) Category:Hot Jupiters