KELT-2A
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
Right ascension | 06h 10m 39s |
Declination | +30° 57′ 25″ |
Apparent magnitude (V) | 8.77[1] |
Characteristics | |
Spectral type | F7V |
Apparent magnitude (V) | 8.77[1] |
Astrometry | |
Radial velocity (Rv) | 47.5±0.2 km/s |
Proper motion (μ) | RA: 21.2±1.4 mas/yr Dec.: -1.5±0.8 mas/yr |
Distance | 419 ± 15 ly (128.6 ± 4.7 pc) |
Details | |
Mass | 1.314 (−0.060 +0.063) M☉ |
Radius | 1.836 (−0.046 +0.066) R☉ |
Temperature | 6148 ± 48 K |
Metallicity | 0.03 ± 0.78 |
Age | 3.97 ± 0.01 billion years |
Other designations | |
Database references | |
SIMBAD | data |
Extrasolar Planets Encyclopaedia | data |
KELT-2A (HD 42176A) is a yellow white dwarf star located about 419 light-years away in the constellation Auriga. The apparent magnitude of this star is 8.77, which means it is not visible to the naked eye but can be seen with a binoculars.
KELT-2A is the brightest star in the common-proper-motion binary star system KELT-2 (HD 42176). KELT-2B is an early K dwarf approximately 295 AU away.
Planetary system
This star has one known planet, the extrasolar planet KELT-2Ab.[1]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.524 ± 0.088 MJ | 0.05504 ± 0.00086 | 4.1137913 ± 0.00001 | 0 | — | 1.290 ± 0.057 RJ |
See also
References
- 1 2 3 Beatty, Thomas G.; et al. (2012). "KELT-2Ab: A Hot Jupiter Transiting the Bright (V = 8.77) Primary Star of a Binary System". The Astrophysical Journal Letters 756 (2). L39. arXiv:1206.1592. Bibcode:2012ApJ...756L..39B. doi:10.1088/2041-8205/756/2/L39.
External links
- KELT-North survey website
- "Planet KELT-2A b". The Extrasolar Planets Encyclopaedia. Retrieved 2012-07-30.
Coordinates: 06h 10m 39s, +30° 57′ 25″
|
This article is issued from Wikipedia - version of the Tuesday, January 06, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.