Astronomy:Kepler-289
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Short description: Star in Cygnus hosting four planets
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 49m 51.68s[1] |
| Declination | +42° 52′ 58.27″[1] |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: 4.7788 ± 0.0294139[1] mas/yr Dec.: -0.2374610 ± 0.0303047[1] mas/yr |
| Parallax (π) | 1.39093 ± 0.0176152[1] mas |
| Details | |
| Mass | 1.1[1] M☉ |
| Radius | 1.0645[1] R☉ |
| Luminosity | 0.1125588[1] L☉ |
| Temperature | 5968.88±41.9175[1] K |
| Metallicity [Fe/H] | -0.0098325 ± 0.0399191 Fe[1] dex |
| Age | 0.65±0.44[1] Gyr |
| Other designations | |
Kepler-289 (PH3) is a rotating variable star slightly more massive than the Sun, with an unknown spectral type, 2300 light-years away from Earth in the constellation of Cygnus. In 2014, three exoplanets were discovered orbiting it.[1]
Planetary system
Kepler-289 hosts four planets, three confirmed (Kepler-289b,[2][3][4][5] Kepler-289c,[6][2][7] Kepler-289d[2][8][9]) and one unconfirmed candidate (Kepler-289e). The discovery of this system was made using the transit method. The inner three planets were found in 2014 with the Kepler space telescope and the Planet Hunters team, while planet e was discovered by follow-up studies in 2017.
Template:Orbitbox planet hypothetical| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.04±0.002 MJ | 0.2 | 34.545 | 0 | — | — |
| d | 0.01 MJ | 0.3 | 66.1 | 0 | — | — |
| c | 0.4 MJ | 0.5 | 125.85 | 0 | — | — |
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 "Kepler-289 | NASA Exoplanet Archive". https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-289.
- ↑ 2.0 2.1 2.2 Schmitt, Joseph R.; Agol, Eric; Deck, Katherine M.; Rogers, Leslie A.; Gazak, J. Zachary; Fischer, Debra A.; Wang, Ji; Holman, Matthew J. et al. (November 2014). "Planet Hunters. VII. Discovery of a New Low-mass, Low-density Planet (PH3c) Orbiting Kepler-289 with Mass Measurements of Two Additional Planets (PH3b and d)" (in en). Astrophysical Journal 795 (2): 167. doi:10.1088/0004-637X/795/2/167. ISSN 0004-637X. Bibcode: 2014ApJ...795..167S.
- ↑ "Kepler-289 b". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-289+b.
- ↑ "The Extrasolar Planet Encyclopaedia — Kepler-289b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_289_b--1863/.
- ↑ Zacharias, N.; Finch, C.; Subasavage, J.; Bredthauer, G.; Crockett, C.; Divittorio, M.; Ferguson, E.; Harris, F. et al. (October 2015). "The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog" (in en). The Astronomical Journal 150 (4): 101. doi:10.1088/0004-6256/150/4/101. ISSN 0004-6256. Bibcode: 2015AJ....150..101Z.
- ↑ "The Extrasolar Planet Encyclopaedia — Kepler-289c". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_289_c--1864/.
- ↑ "Kepler-289 c". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-289+c.
- ↑ "Kepler-289 d". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-289+d.
- ↑ "The Extrasolar Planet Encyclopaedia — Kepler-289d". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_289_d--2567/.
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