KELT-21b
KELT-21b is an extrasolar planet discovered in 2018. It is a hot Jupiter with radius of about 1.586 MJ.[1]
| 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 | |
Mean radius | 1.586[1] RJ |
| Mass | <3.91[1] MJ |
Mean density | <1.24 g cm−3 |
| Temperature | 2051[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
- 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.
2018 in space | ||
|---|---|---|
| ||
Space probe launches  |
|   .png){kind=tracking} |
| Impact events | ||
| Selected NEOs | ||
| Exoplanets | ||
| Discoveries |
| |
| Novae |
| |
| Comets | ||
| Space exploration |
| |
| ||
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.