Planet Kapteyn's c
| Name | Kapteyn's c | ||
| Planet Status | Confirmed | ||
| Discovered in | 2014 | ||
| Mass | 0.022 ( -0.003 +0.0038 ) MJ | ||
| Mass*sin(i) | 0.022 ( -0.003 +0.0038 ) MJ |  |
|
| Semi-Major Axis | 0.311 ( -0.04 +0.014 ) AU | |
|
| Orbital Period | 121.54 (± 0.25) day | |
|
| Eccentricity | 0.23 (± 0.12) | |
|
| ω | 3.9 ( -33.2 +28.9 ) deg | |
|
| Tperi | — | ||
| Radius | — | ||
| Inclination | — | ||
| Update | 2018-11-20 | ||
| Detection Method | Radial Velocity | ||
| Mass Detection Method | Radial Velocity | ||
| Radius Detection Method | — | ||
| Primary transit | — | ||
| Secondary transit | — | ||
| λ | — | ||
| Impact Parameter b | — | ||
| Time Vr=0 | — | ||
| Velocity Semiamplitude K | 2.27 ( -0.26 +0.28 ) m/s | ||
| Calculated temperature | — | ||
| Measured temperature | — | ||
| Hottest point longitude | — | ||
| Geometric albedo | — | ||
| Surface gravity log(g/gH) | — | ||
| Alternate Names | — |
Star
Kapteyn's| Name | Kapteyn's | ||
| Distance | 3.91 (± 0.01) pc | |
|
| Spectral type | dM1 | ||
| Apparent magnitude V | 8.8 | ||
| Mass | 0.281 (± 0.014) MSun | |
|
| Age | 8.0 (± 7.5) Gyr | |
|
| Effective temperature | 3550.0 (± 50.0) K | |
|
| Radius | 0.29 (± 0.025) RSun | |
|
| Metallicity [Fe/H] | -0.86 | |
|
| Detected Disc | — | ||
| Magnetic Field | — | ||
| RA2000 | 05:11:41.0 | ||
| Dec2000 | -45:01:06 | ||
| Alternate Names | |||
| Planetary system | 2 planets |
Remarks
Alias HD 33793More data
- Simbad
- Most recent references (ADS)
AMD-Stability Calculator for the System 
Related publications
Living with a Red Dwarf: Rotation and X-ray and Ultraviolet Properties of the Halo Population Kapteyn's Star
2016
GUINAN E., ENGLE S. & DURBIN A.
ApJ, accepted
arxiv
Stellar activity mimics a habitable-zone planet around Kapteyn's star
2015
ROBERTSON P., ROY A. & MAHADEVAN S.
ApJ Letters, 805, L72
paper arxiv ADS
Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf
2014
ANGLADA-ESCUD2 G., ARRIAGADA P., TUOMI M., ZECHMEISTER M., JENKINS J. et al.
MNRAS, 443, L89
paper arxiv
