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] |
Distance | 1,910 ± 30 ly (587 ± 8 pc) |
Absolute magnitude (MV) | 7.6[2] |
Details | |
Mass | 0.76 ± 0.03[5] M☉ |
Radius | 0.71 ± 0.026[5] R☉ |
Luminosity | 0.14[2] L☉ |
Surface gravity (log g) | 4.610+0.018 −0.031[5] cgs |
Temperature | 4677+82 −71[5] K |
Metallicity [Fe/H] | 0.04 ± 0.15[5] dex |
Rotation | 22.91±0.24 d[6] |
Age | 4.47[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
KIC | data |
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.
Gaia DR3
was invoked but never defined (see the help page).Rappaport2012
was invoked but never defined (see the help page).Skrutskie2006
was invoked but never defined (see the help page).Kawahara2013
was invoked but never defined (see the help page).Simbad
was invoked but never defined (see the help page).