| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 102272 | |
| Constellation | Leo | |
| Right ascension | (α) | 11h 46m 23.5351s[1] |
| Declination | (δ) | +14° 07′ 26.350″[1] |
| Apparent magnitude | (mV) | 8.71[1] |
| Distance | 1200±300 ly (360±90[2] pc) |
|
| Spectral type | K0[3] | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.614 ± 0.001[3] AU |
| Eccentricity | (e) | 0.05 ± 0.04[3] |
| Orbital period | (P) | 127.58 ± 0.30[3] d |
| Argument of periastron |
(ω) | 118 ± 58[3]° |
| Time of periastron | (T0) | 2452146 ± 64[3] JD |
| Semi-amplitude | (K) | 155.5 ± 5.6[3] m/s |
| Physical characteristics | ||
| Mass | (m) | >5.9 ± 0.2[3] MJ |
| Discovery information | ||
| Discovery date | 18 June 2008 | |
| Discoverer(s) | Niedzielski et al. | |
| Detection method | Radial velocity | |
| Discovery site | McDonald Observatory, USA | |
| Discovery status | Announced[3] | |
HD 102272 b is an extrasolar planet approximately 1,200 light-years away in the constellation of Leo. The planet was discovered orbiting the K-type giant star HD 102272 in 2008. The planet was discovered by the radial velocity method, using the Hobby-Eberly Telescope. Another planet, HD 102272 c, was also discovered orbiting the same star. The discovery was announced in June 2008.[3] HD 102272 b orbits at an average of 0.614 astronomical units away from its star, with a mass at least 5.9 ± 0.2 times that of Jupiter.