KELT-2A

KELT-2A (HD 42176A) is a yellow white dwarf star located about 440 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
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension  06h 10m 39.347s[1]
Declination +30° 57 25.70[1]
Apparent magnitude (V) 8.77[2]
Characteristics
Spectral type F7 V
Astrometry
Radial velocity (Rv)47.5 ± 0.2 km/s
Proper motion (μ) RA: 16.597±0.085[1] mas/yr
Dec.: −2.077±0.055[1] mas/yr
Parallax (π)7.47 ± 0.33[1] mas
Distance440 ± 20 ly
(134 ± 6 pc)
Details
Mass1.314 (−0.060 +0.063) M
Radius1.836 (−0.046 +0.066) R
Temperature6148 ± 48 K
Metallicity0.03 ± 0.78
Age3.97 ± 0.01 Gyr
Other designations
HD 42176A, WDS J06107+3057A, TYC 2420-899-1
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia
data

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.[3]

The KELT-2A planetary system
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
gollark: This seems like more of an argument against killing existing ones than against not having new ones?
gollark: If your children are less likely to do well, just have more of them to increase the probability of one being well off or something? Or so you can have lots of them support you a bit in old age.
gollark: However, resource consumption goes up.
gollark: Even bee eugenics?
gollark: The bee eugenics machine takes a batch of 12 bees, scans them, picks the best ones according to our fitness function, sends the bad ones into the singularity compressor, and sends the good ones into the apiaries.

See also

References

  1. Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.Gaia Data Release 1 catalog entry
  2. Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
  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. hdl:1969.1/178896.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.