HD 195019
HD 195019 is a Sun-like star in the constellation Delphinus around which has been found a three-Jupiter-mass exoplanets of the epistellar Jovian type.1 Spectroscopic measurements of the host suggest that it is has a "quiet" chromosphere (an important factor in its suitability to support nearby life) and a metal-content somewhat greater than that of the Sun.
| Host star | |
|---|---|
| distance | 65.3 light-years (20 pc) |
| spectral type | G3 IV-V |
| apparent magnitude | 6.91 |
| temperature | 5,330°C (5,799 K) |
| luminosity (Sun=1) | 2.35 |
| mass (Sun=1) | 0.95 |
| Planet | |
|---|---|
| mass (Jupiter=1) | 3.43 ± 0.4 |
| semi-major axis | 0.14 AU (21 million km, 13 million mi) |
| orbital period | 18.3 ± 0.2 days |
| eccentricity | 0.05 ± 0.04 |
| discovery | 1998 by Marcy et al., Lick and Keck Obs. |
| method | radial velocity |
Reference
1. Fischer, D., Marcy, G., Butler, P., Vogt, S., and Apps, K. , 1998. "Planetary companions around two solar type stars: HD 195019 and HD 217107," PASP, 111, 50.
