| Discovery | |
|---|---|
| Discovered by | Santos,Mayor, Naefet al.[1] |
| Discovery site | La Silla Observatory |
| Discovery date | September 28th, 1999 |
| Doppler Spectroscopy (CORALIE) | |
| Orbital characteristics | |
| 0.15 AU (22,000,000 km) | |
| Eccentricity | 0 |
| 24.348 ± 0.005d | |
| 2,451,979.28 ± 0.08 | |
| 0 | |
| Semi-amplitude | 51.9 ± 2.6 |
| Star | HD 192263 |
HD 192263 b, also namedBeirut, is agas giantplanet with a mass about three quarters that ofJupiter mass. It orbits the star in a circular orbit completing one revolution in 24days or so. It was discovered in 2000 by theGeneva Extrasolar Planet Search team.[1] The planet was independently detected by theCalifornia and Carnegie Planet Search team.[2][3]
The planet HD 192263 b is namedBeirut. The name was selected in theNameExoWorlds campaign byLebanon, during the 100th anniversary of theIAU.Beirut is the capital and largest city of Lebanon.[4][5]
In 2002 the existence of the planet was questioned by G. Henry: The star was observed to havephotometric brightness variations that have same period and velocities as the planet. The signal could come from those variations instead of the planet orbiting the star or suggests thatrotational modulation of the visibility of stellar surface activity is the source of the observedradial velocity variations.[6] Finally, in 2003 the planet was confirmed; the planet is thought to be causing fluctuations in the system'smagnetic field, causing visible activity.[7]
Preliminary astrometry in 2001 set its inclination at 179.5°;[8] but it is now thought to be inclined according to the star's ecliptic, edge-on to Earth.
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