Kepler-40

Kepler-40
Observation data
Epoch J2000      Equinox
Constellation Cygnus
Right ascension 19h 47m 15.2874s[1]
Declination +47° 31′ 35.665″[1]
Apparent magnitude (V) 14.58 (± 0.02)[2]
Characteristics
Evolutionary stage subgiant star
Spectral type F5IV
V−R color index -0.31
R−I color index 0.87
J−H color index 0.242
J−K color index 0.266
Astrometry
Proper motion (μ) RA: −1.469(22) mas/yr[1]
Dec.: −6.768(20) mas/yr[1]
Parallax (π)0.4550 ± 0.0168 mas[1]
Distance7,200 ± 300 ly
(2,200 ± 80 pc)
Details[3][2]
Mass1.48 (±0.06) M☉
Radius2.13 (± 0.06) R☉
Surface gravity (log g)3.812+0.048
−0.017 cgs
Temperature6510 (± 100) K
Metallicity0.10 +0.15
−0.10
Age2.8 (± 0.3) Gyr
Other designations
KIC 10418224, 2MASS 19471528+4731357, KOI-428
Database references
SIMBADdata

Kepler-40, formerly known as KOI-428, is an F-type star in the constellation Cygnus. Kepler-40 is known to host at least one planet, Kepler-40b. The star is approximately 1.5 times more massive than the Sun, and is over two times its size; it was, at upon its discovery, the largest yet discovered with a transiting planet in its orbit.[2] Kepler-40 was first noted as home to a possible transiting object by the Kepler spacecraft; the data on the system was released to the public. A team of French and Swiss scientists used follow-up data to determine the existence of the Hot Jupiter planet Kepler-40b, and later had their results published in a scientific journal on January 4, 2011.

  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 Cite error: The named reference Santerne2010 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Southworth2012 was invoked but never defined (see the help page).