HD 10180 c
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 10180 | |
| Constellation | Hydrus | |
| Right ascension | (α) | 01h 37m 53.5763s |
| Declination | (δ) | -60° 30′ 41.499″ |
| Apparent magnitude | (mV) | 7.33 |
| Distance | 128 ± 3 ly (39.4 ± 1 pc) |
|
| Spectral type | G1V | |
| Mass | (m) | 1.062 ± 0.017 M☉ |
| Radius | (r) | 1.20 ± 0.318 R☉ |
| Temperature | (T) | 5911 K |
| Metallicity | [Fe/H] | =![\begin{smallmatrix}\left[\frac{Fe}{H}\right]\ =\ 0.08\end{smallmatrix}](/2012-wikipedia_en_all_nopic_01_2012/I/5f6c13326b1267c731fee8aa5bacfdd7.png) |
| Age | 7.3 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.0641 ± 0.0010 AU |
| Eccentricity | (e) | 0.045 ± 0.026 |
| Orbital period | (P) | 5.75979 ± 0.00062 d |
| Orbital speed | (υ) | 136 km/s |
| Argument of periastron |
(ω) | 332 ± 43° |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 13.10 ± 0.54 M⊕ |
| Discovery information | ||
| Discovery date | 24 August 2010 | |
| Discoverer(s) | ||
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 10180 c is an extrasolar planet approximately 130 light-years away in the constellation Hydrus. With a minimum mass comparable to that of Neptune, it is of the class of planets known as Hot Neptunes. Dynamical simulations suggest that if the mass gradient was any more than a factor of two, the system would not be stable.
While planet c does not exist in any mean motion resonances, both planets with adjacent orbits (b and d) share near resonances with c.