HD 30177 b
Extrasolar planet in the constellation Dorado
From Wikipedia, the free encyclopedia
HD 30177 b is an extrasolar planet located approximately 181.6 light-years away in the constellation of Dorado, orbiting the star HD 30177.
| Discovery | |
|---|---|
| Discovered by | Tinney, Butler, Marcy et al. |
| Discovery site | Anglo-Australian Planet Search |
| Discovery date | June 13, 2002[1] |
| radial velocity | |
| Orbital characteristics[2] | |
| 3.604+0.135 −0.147 AU | |
| Eccentricity | 0.207+0.012 −0.017 |
| 6.884+0.014 −0.012 yr | |
| Inclination | 85.393°+14.354° −18.742° |
| 311.232°+65.057° −148.076° | |
| 2448895.006+28.802 −21.419 JD | |
| 25.044°+5.476° −2.875° | |
| Semi-amplitude | 128.935+2.386 −2.245 m/s |
| Star | HD 30177 |
| Physical characteristics[2] | |
| Mass | 8.403+1.241 −0.489 MJ |
Discovery
This planet was discovered on June 13, 2002[1] by Tinney, Butler, and Marcy et al. using the Doppler spectroscopy from the Anglo-Australian Telescope.[3][4]
Properties
This is one of the most massive planets ever detected by the radial velocity method. In addition, the planet orbits far from the star, about 4 AU away, taking 2770 days (7.58 years) to orbit the star. Even though the massive planet is orbiting at 4 AU from the star, the radial velocity semi-amplitude is high, around 146.8±2.8 m/s. In 2022, the inclination and true mass of HD 30177 b were measured via astrometry, showing the true mass to be close to the minimum mass.[2]
