HD 9578
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 01h 33m 17.14s[1] |
| Declination | −38° 14′ 42.1″[1] |
| Apparent magnitude (V) | 8.201 |
| Characteristics | |
| Spectral type | G1V |
| Apparent magnitude (B) | 8.788 |
| Apparent magnitude (J) | 7.156 |
| Apparent magnitude (H) | 6.89 |
| Apparent magnitude (K) | 6.798 |
| B−V color index | 0.587 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | –3.9 km/s |
| Proper motion (μ) | RA: –30.95 ± 0.69[1] mas/yr Dec.: –38.41 ± 0.54[1] mas/yr |
| Parallax (π) | 17.44 ± 0.85[1] mas |
| Distance | 187 ± 9 ly (57 ± 3 pc) |
| Absolute magnitude (MV) | 4.412 |
| Details | |
| Mass | 1.12 M☉ |
| Radius | 1.12 ± 0.1 R☉ |
| Luminosity | 1.395 ± 0.163 L☉ |
| Surface gravity (log g) | 4.40 cgs |
| Temperature | 5930 ± 100 K |
| Metallicity | 0.11 |
| Other designations | |
HIP 7240, TYC 7541-00066-1, CD-38 528, CPD-38 128, SAO 193177, PPM 277127, 2MASS J01331715-3814421 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 9578 is a star located approximately 187 light-years away in the constellation of Sculptor. It is a Sun-like star that in 2009 has been found to host an extrasolar planet.
Planetary system
HD 9578 b is an extrasolar planet with at least 0.62 times the mass of Jupiter. It takes 494 days to orbit the star, with an orbital semimajor axis of 1.27 AU. The discovery was announced in a press release in October 2009, but no discovery paper has yet been made available.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.62 MJ | 1.27 | 494 | ? | — | — |
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
Coordinates: 
01h 33m 17.1440s, −38° 14′ 42.058″
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