HD 4208
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 44m 26.65s[1] |
| Declination | –26° 30′ 56.4″[1] |
| Apparent magnitude (V) | 7.79 |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: 314.70 ± 0.63[1] mas/yr Dec.: 150.27 ± 0.59[1] mas/yr |
| Parallax (π) | 30.89 ± 0.75 mas[1] |
| Distance | 106 ± 3 ly (32.4 ± 0.8 pc) |
| Details | |
| Mass | 0.86 ± 0.02[2] M☉ |
| Radius | 0.86 ± 0.01[2] R☉ |
| Luminosity | 0.71 ± 0.004[2] L☉ |
| Surface gravity (log g) | 4.5 ± 0.03[2] cgs |
| Temperature | 5717 ± 33[2] K |
| Age | 6.6 ± 2.1[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 4208 is an 8th magnitude star located approximately 106 light years away[1] in the constellation of Sculptor. Its spectral type is G5V. It is a yellow dwarf similar to our Sun, only slightly cooler and dimmer. It is not visible to the unaided eye, but with binoculars or small telescope it should be an easy target.
In 2001, a planet was discovered orbiting the star.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.804 ± 0.073 MJ | 1.650 ± 0.096 | 828.0 ± 8.1 | 0.052 ± 0.040 | — | — |
See also
References
- ^ a b c d e f 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
- ^ a b c d e f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ^ Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. arXiv:astro-ph/0110378. Bibcode:2002ApJ...568..352V. doi:10.1086/338768.
- ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
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