XO-5b
| Exoplanet | List of exoplanets | |
|---|---|---|
 |
||
| Parent star | ||
| Star | XO-5 | |
| Constellation | Lynx | |
| Right ascension | (α) | 07h 46m 51.959s |
| Declination | (δ) | +39° 05′ 40.46″ |
| Apparent magnitude | (mV) | 12.13 ± 0.03 |
| Distance | 848 ± 39 ly (260 ± 12 pc) |
|
| Spectral type | G8V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.0488 ± 0.0006AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 4.1877545 ± 0.0000016d |
| Inclination | (i) | 86.7 ± 0.4° |
| Time of transit | (Tt) | 2454552.67168 ± 0.00029JD |
| Semi-amplitude | (K) | 144.9 ± 2.0m/s |
| Physical characteristics | ||
| Mass | (m) | 1.059 ± 0.028MJ |
| Radius | (r) | 1.109 ± 0.050RJ |
| Density | (ρ) | 0.96+0.14 −0.11g cm−3 |
| Surface gravity | (g) | 22 ± 5m/s² |
| Temperature | (T) | 1221 ± 27 |
| Discovery information | ||
| Discovery date | 2008 | |
| Discoverer(s) | XO Project | |
| Discovery method | Transit | |
| Discovery site | XO Telescope at Maui, Hawaii | |
| Discovery status | Published | |
XO-5b is an extrasolar planet approximately 850 light years away in the constellation of Lynx. This planet was found by the transit method using the XO Telescope in May 2008. It was also independently discovered by the HATNet Project. The planet has a mass and radius just slightly larger than that of Jupiter. This planet orbits very close to the G-type parent star, as it is typical for transiting planets, classing this as Hot Jupiter. It takes only 4.188 days (or 100.5 hours) to orbit at an orbital distance of 0.0488 AU).
Coordinates: 
07h 46m 51.959s, +39° 05′ 40.47″
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