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Kepler-1638 is a G4V-type star located 4,973 light years away in the constellation of Cygnus.[1] At least one exoplanet has been found orbiting the star: Kepler-1638b.[4][5][6][7][8] This planet is a potentially habitable Super-Earth. As of January 2021, Kepler-1638 is the farthest star with a known potentially habitable exoplanet.[9]

Kepler-1638

Constellation where Kepler-1638 is located
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cygnus[1]
Right ascension 19h 41m 55.76719s[2]
Declination +48° 31′ 27.9995″[2]
Apparent magnitude (V) 14.769±0.206[3]
Characteristics
Evolutionary stage main sequence star
Spectral type G4V[citation needed]
Apparent magnitude (J) 13.550±0.023[2]
Apparent magnitude (H) 13.204±0.024[2]
Apparent magnitude (K) 13.138±0.035[2]
Variable type Planetary transit,[3] rotationally variable[2]
Astrometry
Proper motion (μ) RA: -5.138[2] mas/yr
Dec.: 5.859[2] mas/yr
Parallax (π)0.6269 ± 0.0210 mas[2]
Distance5,200 ± 200 ly
(1,600 ± 50 pc)
Details[3]
Mass0.9700+0.0490
−0.0590 M☉
Radius0.9500+0.1660
−0.0790 R☉
Temperature5710.0+96.696
−111.431 K
Metallicity [Fe/H]−0.0100+0.1410
−0.1880 dex
Age4.37+4.19
−2.59 Gyr
Other designations
KOI-5856, Gaia DR2 2134726877877965568, KIC 11037818, 2MASS J19415577+4831280[2]
Database references
SIMBADdata

Planetary system


The Kepler-1638 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 4.16 M🜨 0.745+0.021
−0.020		 259.33683±0.01303 — 89.9954+0.0021
−0.0844°		 1.87+0.33
−0.22 R🜨
Kepler-1638 b
Discovery
Discovered byAmes Research Center
Discovery date2016
Detection method
Transit
Orbital characteristics
Orbital period (sidereal)
259.337±0.013 d
StarKepler-1638
Physical characteristics
Mean radius
1.87+0.33
−0.22 REarth
Mass4.16 MEarth

    Kepler-1638 b is an exoplanet in orbit of its star, Kepler-1638, located in the constellation Cygnus. The planet is a super-Earth, with a radius of 1.87+0.33
    −0.22     REarth, and a mass of 4.16 Earths. It has an orbit of 259.337±0.013 days in its system's habitable zone and orbits 0.745 AU from its star. It is the farthest potentially habitable exoplanet discovered, at approximately 2,867 light-years (879 pc) from Earth.[10][8][5][6][7]


    References


    1. Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 16 July 2020.
    2. "Kepler-1638". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2 February 2021.
    3. "Kepler-1638". NASA Exoplanet Archive. Retrieved 2 February 2021.
    4. "Kepler-1638 (Planet Orbiting Star) Facts". Universe Guide. Retrieved 21 January 2021.
    5. Burgess, Matt (11 May 2016). "Nasa's Kepler telescope just found 1,284 exoplanets". Wired UK. ISSN 1357-0978. Retrieved 22 January 2021.
    6. "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 22 January 2021.
    7. May 2016, Mike Wall 11. "1st Alien Earth Still Elusive Despite Huge Exoplanet Haul". Space.com. Retrieved 22 January 2021.
    8. Morton, Timothy D.; Bryson, Stephen T.; Coughlin, Jeffrey L.; Rowe, Jason F.; Ravichandran, Ganesh; et al. (May 2016). "False Positive Probabilities for all Kepler Objects of Interest: 1284 Newly Validated Planets and 428 Likely False Positives". The Astrophysical Journal. 822 (2). arXiv:1605.02825. Bibcode:2016ApJ...822...86M. doi:10.3847/0004-637X/822/2/86.
    9. "The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". phl.upr.edu. Retrieved 21 January 2021.
    10. "Kepler-1638 b". NASA Exoplanet Science Institute. 10 May 2016. Retrieved 11 May 2016.




    See also


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