HD 6718
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 01h 07m 48.66s[1] |
| Declination | –08° 14′ 01.3″[1] |
| Apparent magnitude (V) | 8.450 |
| Characteristics | |
| Spectral type | G0V |
| Apparent magnitude (B) | 9.087 |
| Apparent magnitude (J) | 7.269 |
| Apparent magnitude (H) | 6.99 |
| Apparent magnitude (K) | 6.876 |
| B−V color index | 0.637 |
| Astrometry | |
| Radial velocity (Rv) | 34.56 km/s |
| Proper motion (μ) | RA: 192.24±0.82[1] mas/yr Dec.: 19.77±0.51[1] mas/yr |
| Parallax (π) | 18.23 ± 0.76[1] mas |
| Distance | 179 ± 7 ly (55 ± 2 pc) |
| Absolute magnitude (MV) | 4.748 |
| Details | |
| Mass | 0.98 ± 0.04[2] M☉ |
| Radius | 1.01 ± 0.02[2] R☉ |
| Luminosity | 1.07 ± 0.01[2] L☉ |
| Surface gravity (log g) | 4.42 ± 0.04[2] cgs |
| Temperature | 5818 ± 57[2] K |
| Metallicity | -0.06 |
| Age | 6.0 ± 2.4[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 6718 is an 8th magnitude G-type main sequence star located approximately 179 light years away in the constellation Cetus. This star is slightly larger, cooler, brighter, and more massive than our Sun. Also its metal content is seven-eighths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 1.56+0.11 −0.10 MJ |
3.56+0.24 −0.15 |
2496±176 | 0.10+0.11 −0.04 |
— | — |
See also
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 - 1 2 3 4 5 6 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.
- ↑ Naef, D.; et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics. 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616.
Coordinates: 
01h 07m 48.6625s, −08° 14′ 01.341″
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