astro.wikisort.org - Planet
Kepler-12 is a star with a transiting planet Kepler-12b in a 4-day orbit.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 19h 04m 58.4221s[1] |
| Declination | +50° 02′ 25.271″[1] |
| Apparent magnitude (V) | 13.4[2] |
| Astrometry | |
| Proper motion (μ) | RA: 3.053±0.025[1] mas/yr Dec.: 3.235±0.024[1] mas/yr |
| Parallax (π) | 1.1057 ± 0.0125 mas[1] |
| Distance | 2,950 ± 30 ly (900 ± 10 pc) |
| Characteristics | |
| Spectral type | G0[2] |
| Details[2] | |
| Mass | 1.166±0.054 M☉ |
| Radius | 1.483±0.029 R☉ |
| Temperature | 5947±100 K |
| Metallicity [Fe/H] | 0.07 (± 0.04) dex |
| Rotational velocity (v sin i) | 2.7±0.5[3] km/s |
| Age | 4.0±0.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Characteristics
Kepler-12, known also as KIC 11804465 in the Kepler Input Catalog, is an early G-type to late F-type star. This corresponds strongly with a sunlike dwarf star nearing the end of the main sequence, and is about to become a red giant.[4] Kepler-12 is located approximately 900 parsecs (2,950 light years) away from Earth. The star also has an apparent magnitude of 13.438, which means that it cannot be seen from Earth with the unaided eye.[2]
The star is slightly more massive, slightly more iron-rich and slightly hotter than the Sun. However, Kepler-12 is larger, with a radius of 1.483 times the Sun's radius.[2]
Planetary system
The one currently known planet is a hot Jupiter with a radius 1.7 times that of Jupiter but less than half the mass.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.432+0.053 −0.051 MJ |
0.0553+0.0010 −0.0012 |
4.4379637±0.0000002 | 0 | 88.796+0.088 −0.074° |
1.754+0.031 −0.036 RJ |
References
- 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.
- "Notes on Kepler-12 b". Retrieved 29 December 2016.
- "Kepler-12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 December 2016.
- Fortney, Jonathan J.; et al. (2011). "Discovery and Atmospheric Characterization of Giant Planet Kepler-12b: An Inflated Radius Outlier". The Astrophysical Journal Supplement Series. 197 (1). 9. arXiv:1109.1611. Bibcode:2011ApJS..197....9F. doi:10.1088/0067-0049/197/1/9.
- Esteves, Lisa J.; Mooij, Ernst J. W. De; Jayawardhana, Ray (2015). "Changing Phases of Alien Worlds: Probing Atmospheres Of Kepler planets with High-Precision Photometry". The Astrophysical Journal. 804 (2). 150. arXiv:1407.2245. Bibcode:2015ApJ...804..150E. doi:10.1088/0004-637X/804/2/150.
Constellation of Draco | |||||||||||||
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На других языках
- [en] Kepler-12
[ru] Kepler-12
Kepler-12 — звезда, которая находится в созвездии Дракона на расстоянии около 1956 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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