Planetary System
On March 5, 2007, the astronomer Dominique Naef used the HARPS spectrograph to uncover HD 221287 b (among others). Using the amplitude from observations with HARPS, he calculated a minimum mass of 3.12 times that of Jupiter, making this a superjovian. This planet orbits 25% further from the star than Earth to the Sun with a low eccentricity.
Stability analysis reveals that the orbits of Earth sized planets in HD 221287 b's Trojan points, located 60 degrees ahead and behind the planet in its orbit, would be stable for long periods of time.
| Companion |
Mass | Semimajor axis |
Orbital period |
Eccentricity | Radius |
|---|---|---|---|---|---|
| b | >3.09 ± 0.79 MJ | 1.25 ± 0.04 | 456.1 ± 6.5 | 0.08 ± 0.11 | — |
Read more about this topic: HD 221287
Famous quotes containing the words planetary and/or system:
“We cannot cheat on DNA. We cannot get round photosynthesis. We cannot say I am not going to give a damn about phytoplankton. All these tiny mechanisms provide the preconditions of our planetary life. To say we do not care is to say in the most literal sense that “we choose death.””
—Barbara Ward (1914–1981)
“Whoever places his trust into a system will soon be without a home. While you are building your third story, the two lower ones have already been dismantled.”
—Franz Grillparzer (1791–1872)