Kepler-1520

Kepler-1520
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 23m 51.8899s[1]
Declination +51° 30′ 16.983″[1]
Apparent magnitude (V) 16.7[2]
Characteristics
Evolutionary stage Main sequence
Spectral type K4V[3]
Apparent magnitude (V) 16.7[2]
Apparent magnitude (J) 14.021±0.035[4]
Apparent magnitude (H) 13.433±0.035[4]
Apparent magnitude (K) 13.319±0.035[4]
Astrometry
Proper motion (μ) RA: 0.312(36) mas/yr[1]
Dec.: 11.156(30) mas/yr[1]
Parallax (π)1.7034 ± 0.0242 mas[1]
Distance1,910 ± 30 ly
(587 ± 8 pc)
Absolute magnitude (MV)7.6[2]
Details
Mass0.76 ± 0.03[5] M☉
Radius0.71 ± 0.026[5] R☉
Luminosity0.14[2] L☉
Surface gravity (log g)4.610+0.018
−0.031[5] cgs
Temperature4677+82
−71[5] K
Metallicity [Fe/H]0.04 ± 0.15[5] dex
Rotation22.91±0.24 d[6]
Age4.47[5] Gyr
Other designations
Gaia DR2 2136216647412563840, KIC 12557548, 2MASS J19235189+5130170[7]
Database references
SIMBADdata
KICdata

Kepler-1520 (initially published as KIC 12557548) is a K-type main-sequence star located in the constellation Cygnus. The star is particularly important, as measurements taken by the Kepler spacecraft indicate that the variations in the star's light curve cover a range from about 0.2% to 1.3% of the star's light being blocked.[2] This indicates that there may be a rapidly disintegrating planet, a prediction not yet conclusively confirmed, in orbit around the star, losing mass at a rate of 1 Earth mass every billion years.[2] The planet itself is about 0.1 Earth masses,[8] or just twice the mass of Mercury, and is expected to disintegrate in about 100[8]-200 million years.[2] The planet orbits its star in just 15.7 hours,[2] at a distance only two stellar diameters away from the star's surface,[9] and has an estimated effective temperature of about 2255 K.[8] The orbital period of the planet is one of the shortest ever detected in the history of the extrasolar planet search.[10] In 2016, the planet was confirmed as part of a data release by the Kepler spacecraft.

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Rappaport2012 was invoked but never defined (see the help page).
  3. ^ "KIC 12557548 b". Extrasolar Planets Encyclopaedia. Archived from the original on 12 June 2018. Retrieved 2 August 2016. Note: The EPE has not fully updated this data to be renamed Kepler-1520, but the spectral type is listed, hence this is the reference for it.
  4. ^ a b c Cite error: The named reference Skrutskie2006 was invoked but never defined (see the help page).
  5. ^ a b c d e f "NASA Exoplanet Archive". NASA Exoplanet Science Institute. Retrieved 2016-08-02.
  6. ^ Cite error: The named reference Kawahara2013 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  8. ^ a b c Ouellette, Jennifer (May 26, 2012). "Dust to Dust: The Death of an Exoplanet". Discovery News. Discovery Communications, LLC. Archived from the original on July 2, 2012. Retrieved June 9, 2012.
  9. ^ Staff, Space.com (24 March 2012). "Possible Newfound Alien Planet is Falling to Pieces". Space.com. Retrieved June 9, 2012.
  10. ^ "NASA's Kepler Detects Potential Evaporating Planet" (Press release). Jet Propulsion Laboratory. May 21, 2012. Archived from the original on February 19, 2021. Retrieved June 11, 2012.