Kepler-39

Last updated
Kepler-39
Observation data
Epoch J2000       Equinox J2000
Constellation Cygnus
Right ascension 19h 47m 50.4746s [1]
Declination +46° 02 03.500 [1]
Apparent magnitude  (V)14.3 [2]
Characteristics
Spectral type F7V [3]
Astrometry
Proper motion (μ)RA: 3.894(18)  mas/yr [1]
Dec.: −2.345(17)  mas/yr [1]
Parallax (π)0.9316 ± 0.0139  mas [1]
Distance 3,500 ± 50  ly
(1,070 ± 20  pc)
Details [3]
Mass 1.29+0.06
−0.07
  M
Radius 1.40±0.10  R
Surface gravity (log g)4.25±0.06  cgs
Temperature 6350±100  K
Metallicity [Fe/H]0.10±0.14  dex
Rotation 4.464±0.013 days [4]
Rotational velocity (v sin i)16±2.5 km/s
Age 2.1+0.8
−0.9
  Gyr
Other designations
KOI-423, KIC  9478990, Gaia DR2  2080168561154800384, 2MASS J19475046+4602034
Database references
SIMBAD data
KIC data

Kepler-39 (2MASS J19475046+4602034) is an F-type main sequence star located in the constellation Cygnus. It is located about 3,500 light-years (1,070 parsecs) away. [1] One known substellar companion orbits it, Kepler-39b. [5]

Planetary system

Kepler-39b is generally considered a brown dwarf rather than a planet since it does not meet the standard definition of planet. Some authorities such as the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive include it among their list of confirmed planets. [2] [6]

The Kepler-39 planetary system [3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 20.1+1.3
−1.2
  MJ
0.164±0.00321.087210±0.0000370.112±0.05789.07±0.22 ° 1.24+0.09
−0.10
  RJ

Related Research Articles

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Kepler-17 is a main-sequence yellow dwarf star that is much more active than the Sun with starspots covering roughly 6% of its surface. Starspots are long-lived, with at least one persisting for 1400 days.

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Kepler-24 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 19h 21m 39.0s, Declination +38° 20′ 37″. With an apparent visual magnitude of 15.5, this star is too faint to be seen with the naked eye.

<span class="mw-page-title-main">Kepler-25</span> Yellow-white hued star in the constellation Lyra

Kepler-25 is a star in the northern constellation of Lyra. It is slightly larger and more massive than the Sun, with a luminosity 212 times that of the Sun. With an apparent visual magnitude of 10.6, this star is too faint to be seen with the naked eye.

<span class="mw-page-title-main">Kepler-26</span> Star in the constellation Lyra

Kepler-26 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 18h 59m 45.8407s Declination +46° 33′ 59.438″. With an apparent visual magnitude of 15.5, this star is too faint to be seen with the naked eye.

Kepler-102 is a star 353 light-years away in the constellation of Lyra. Kepler-102 is less luminous than the Sun. The star system does not contain any observable amount of dust. Kepler-102 is suspected to be orbited by a binary consisting of two red dwarf stars, at projected separations of 591 and 627 AU.

Kepler-30 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 19h 01m 08.0747s Declination +38° 56′ 50.219″. With an apparent visual magnitude of 15.5, this star is too faint to be seen with the naked eye. Kepler-30 is exhibiting a strong starspot activity.

Kepler-28 is a star in the northern constellation of Cygnus., It is orbited by two exoplanets. It is located at the celestial coordinates: Right Ascension 19h 28m 32.8905s, Declination +42° 25′ 45.959″. With an apparent visual magnitude of 15.036, this star is too faint to be seen with the naked eye.

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<span class="mw-page-title-main">Kepler-444</span> Triple star system in the constellation of Lyra

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Kepler-419 is an F-type main-sequence star located about 3,280 light years from Earth in the constellation Cygnus. It is located within the field of vision of the Kepler spacecraft, the satellite that NASA's Kepler Mission used to detect planets that may be transiting their stars. In 2012, a potential planetary companion in a very eccentric orbit was detected around this star, but its planetary nature was not confirmed until 12 June 2014, when it was named Kepler-419b. A second planet was announced orbiting further out from the star in the same paper, named Kepler-419c.

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Kepler-411 is a binary star system. Its primary star Kepler-411A is a K-type main-sequence star, orbited by the red dwarf star Kepler-411B on a wide orbit, discovered in 2012.

References

  1. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 "Kepler-39 b". Extrasolar Planets Encyclopaedia . Retrieved 2018-06-09.
  3. 1 2 3 Bonomo, A. S.; et al. (2015). "Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N". Astronomy and Astrophysics. 575. A85. arXiv: 1501.02653 . Bibcode:2015A&A...575A..85B. doi:10.1051/0004-6361/201323042. S2CID   119230291.
  4. McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv: 1308.1845 . Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11. S2CID   118557681.
  5. Bouchy, F.; et al. (2011). "SOPHIE velocimetry of Kepler transit candidates. III. KOI-423b: an 18 MJup transiting companion around an F7IV star". Astronomy and Astrophysics. 533. A83. arXiv: 1106.3225 . Bibcode:2011A&A...533A..83B. doi:10.1051/0004-6361/201117095. S2CID   62836749.
  6. "Kepler-39 b". NASA Exoplanet Archive. Retrieved 2018-06-09.