HD 168443
HD 168443 is a Sun-like star in the constellation Serpens around which has been found a high-mass exoplanet (HD 168443 b) in a small orbit of very high eccentricity1 and a brown dwarf (HD 168443 c) in a larger orbit at the edge of the star's habitable zone.2
| Host star | |
|---|---|
| distance | 123.5 light-years (37.88 pc) |
| spectral type | G5IV |
| apparent magnitude | 6.92 |
| temperature | 5,160 °C (5,430 K) |
| luminosity (Sun=1) | 2.1 |
| mass (Sun=1) | 0.95 |
| position | RA 18h 20m 04.11s; Dec -09° 35' 34.6" |
| Planet: HD 168443 b | |
|---|---|
| mass (Jupiter=1) | 7.2 ± 0.4 |
| semimajor axis | 0.29 AU (43.5 million km, 27.0 million mi) |
| orbital period | 58.1 days |
| eccentricity | 0.53 ± 0.02 |
| discovery | 1998, Marcy et al. |
| method | radial velocity |
| Brown dwarf: HD 168443 c | |
|---|---|
| mass (Jupiter=1) | 34 ± 12 |
| semimajor axis | 2.87 AU (430 million km, 267 million mi) |
| orbital period | 1740 ± 4 days |
| eccentricity | 0.228 ± 0.005 |
| discovery | 2005, Marcy et al. |
| method | radial velocity |
References
1. Marcy, G. W., Butler, R. P, Vogt, S. S., Fischer, D., and Liu, M.
C. "Two New Planets in Eccentric Orbits," Astrophysical Journal, 520, 239 (1999).
2. Marcy, G., Butler, R., Vogt, S., Liu, M., Laughlin, G., Apps, K.,
Graham, J., Lloyd, J., Luhman, K., Jayawardhana, R. "Two Substellar
Companions Orbiting HD 168443," Astrophysical Journal, 555,
418–425 (2005).
