Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 10m 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 ° | — |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 10m 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 ° | — |