HD 9578 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 9578 | |
| Constellation | Sculptor | |
| Right ascension | (α) | 01h 33m 17.1440s |
| Declination | (δ) | –38° 14′ 42.058″ |
| Apparent magnitude | (mV) | 8.201 |
| Distance | 186.75 ± 9.45 ly (57.24 ± 2.9 pc) | |
| Spectral type | G1V | |
| Orbital elements | ||
| Semi-major axis | (a) | 1.27 AU (190 Gm) |
| Orbital period | (P) | 494 d (1.35 y) |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.62 MJ |
| Discovery information | ||
| Discovery date | October 19, 2009 | |
| Discoverer(s) | Segransan et al. | |
| Discovery method | radial velocity (HARPS) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Unpublished | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 9578 b is an extrasolar planet which orbits the G-type main sequence star HD 9578, located approximately 187 light years away in the constellation Sculptor. This planet has at least five-eighths the mass of Jupiter and takes four-thirds years to orbit the star at a semimajor axis of 1.27 AU. However unlike most other known exoplanets, its eccentricity is not known, but it is typical that its inclination is not known. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.
Coordinates: 
01h 33m 17.1440s, −38° 14′ 42.058″
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