19h10m25.3471s, +49° 31′ 23.7119″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h10m 25.34699s[1] |
| Declination | +49° 31′ 23.7126″[1] |
| Apparent magnitude (V) | 12.55[2] |
| Characteristics | |
| Kepler-411A | |
| Evolutionary stage | main-sequence star |
| Spectral type | K3V |
| Astrometry | |
| Kepler-411A | |
| Radial velocity (Rv) | −20.40±0.77[1] km/s |
| Proper motion (μ) | RA: 13.611[1] mas/yr Dec.: 32.543[1] mas/yr |
| Parallax (π) | 6.5313 ± 0.0080 mas[3] |
| Distance | 499.4 ± 0.6 ly (153.1 ± 0.2 pc) |
| Kepler-411B | |
| Proper motion (μ) | RA: 13.263[3] mas/yr Dec.: 33.008[3] mas/yr |
| Parallax (π) | 6.5727 ± 0.0573 mas[3] |
| Distance | 496 ± 4 ly (152 ± 1 pc) |
| Position (relative to Kepler-411A)[4] | |
| Component | Kepler-411B |
| Epoch of observation | 2012 |
| Angular distance | 3.4±0.06″ |
| Position angle | 331±3° |
| Projected separation | 520 AU |
| Details | |
| Kepler-411A | |
| Mass | 0.75[1] M☉ |
| Radius | 0.76[1] R☉ |
| Luminosity | 0.27[1] L☉ |
| Surface gravity (log g) | 4.58[1] cgs |
| Temperature | 4,773[1] K |
| Metallicity [Fe/H] | 0.11±0.1[5] dex |
| Rotation | 10.52 d[6] |
| Age | 0.212±0.031[7] Gyr |
| Kepler-411B | |
| Mass | 0.33[8] M☉ |
| Radius | 0.49[4] R☉ |
| Temperature | 3,446[8] K |
| Other designations | |
| |
| Kepler-411A: KOI-1781, KIC 11551692, 2MASS J19102533+4931237[2] | |
| Kepler-411B: Gaia DR3 2132768956904826624 | |
| Database references | |
| SIMBAD | data |
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.[4]
The primary star's surface temperature is 4,773 K. Kepler-411A is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.11±0.1,[5] but is much younger at an age of 212±31 million years.[7]
Kepler-411A exhibits significant starspot activity, with starspots covering 1.7+0.3
−0.2% of the stellar surface.[9] Darker starspots are concentrated around the equator of the star. Kepler-411A exhibits differential rotation, but with smaller amount of differential shear compared to the Sun.[6]
The companion Kepler-411B is 533 au away from Kepler-411A.[8] It is a red dwarf and a flare star.[10]
In 2013, one planet, named Kepler-411b, was discovered,[11] followed by planet Kepler-411c in 2016. Third planet in system detected by transit method, d, along with e detected by radial velocity method, were discovered in 2019.[12][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b[13] | 0.08055±0.00818 MJ | 0.0375±0.0008 | 3.005156±0.000002 | 0.146+0.004 −0.005 |
87.4±0.1° | 0.214±0.005 RJ |
| c[14] | 0.08306±0.01856 MJ | 0.0739±0.001 | 7.834436247±0.000001137[15] | 0.108+0.003 −0.004 |
88.61±0.04° | 0.394±0.006 RJ |
| d[16] | 0.04782±0.01605 MJ | 0.279±0.004 | 58.02023116±0.00004203[15] | 0.128±0.003 | 89.43±0.02° | 0.296±0.009 RJ |
| e[17] | 0.03398±0.00346 MJ | 0.186±0.003 | 31.509728±0.000085 | 0.016+0.002 −0.001 |
88.04±0.02° | — |
