Kepler-438
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 46m 34.993s[1] |
| Declination | +41° 57′ 03.93″[1] |
| Apparent magnitude (V) | 15.0[2] |
| Astrometry | |
| Distance | 473 ± 75 ly (145 ± 23[3] pc) |
| Absolute magnitude (MV) | 9.55+0.54 −0.44[3] |
| Details[3] | |
| Mass | 0.544+0.061 −0.041 M☉ |
| Radius | 0.52+0.061 −0.038 R☉ |
| Luminosity | 0.044+0.017 −0.012 L☉ |
| Surface gravity (log g) | 4.74 cgs |
| Temperature | 5541±60 K |
| Metallicity [Fe/H] | 0.16±0.14 dex |
| Age | 4.4+0.7 −0.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-438 is a red dwarf in the constellation Lyra, about 470 light years from Earth.[5] Kepler-438b is the 1000th exo planet discovered and it was discovered in 2015 by NASA'S Kepler space telescopes.[6] It is notable for its planetary system, which includes Kepler-438b, a possibly Earth-size planet within Kepler-438's habitable zone. Alongside the discovery of Kepler-438 came the discovery of another exoplanet, Kepler-442b, both of which orbit smaller stars than of our own star.[7]
Planetary system
The system has one confirmed planet however transit timing observations of Kepler-438b indicate the possible presence of additional planets.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.166 | 35.23319 | 0.03 | 89.86° | 0.0999 ± 0.015 RJ |
References
- 1 2 Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
- 1 2 "Notes on Kepler-438 b". exoplanet.eu. Retrieved 21 January 2017.
- 1 2 3 Torres, Guillermo; et al. (2015). "Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone". American Astronomical Society. arXiv:1501.01101. Bibcode:2015AAS...22543802C. doi:10.1088/0004-637X/800/2/99.
- ↑ "KOI-3284". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
- ↑ NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones
- ↑ "Kepler Discovers 1000th Exoplanet | Science Mission Directorate". science.nasa.gov. Retrieved 2017-05-09.
- ↑ "Alien earth 'could support life', but what is Kepler 438b like?". The Week UK. Retrieved 2017-05-09.
- ↑ Kipping, D. M.; et al. (2014). "The Hunt for Exomoons with Kepler (HEK). IV. A Search for Moons around Eight M Dwarfs". The Astrophysical Journal. 784 (1). 28. arXiv:1401.1210. Bibcode:2014ApJ...784...28K. doi:10.1088/0004-637X/784/1/28.
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