HD 6718

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
Distance179 ± 7 ly
(55 ± 2 pc)
Absolute magnitude (MV)4.748
Details
Mass0.98 ± 0.04[2] M☉
Radius1.01 ± 0.02[2] R☉
Luminosity1.07 ± 0.01[2] L☉
Surface gravity (log g)4.42±0.02[3] cgs
Temperature5,728±5[3] K
Metallicity [Fe/H]−0.064±0.004[3] dex
Rotational velocity (v sin i)2.00±0.12[3] km/s
Age6.0 ± 2.4[2] Gyr
Other designations
BD–09°221, HIP 5301, LTT 641, NLTT 3753, PPM 183064, SAO 129137
Database references
SIMBADdata
Exoplanet Archivedata
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.

The HD 6718 planetary system[4]
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. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 4 Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. Bibcode:2015A&A...575A..18B. arXiv:1411.4302 Freely accessible. doi:10.1051/0004-6361/201424951.
  3. 1 2 3 4 dos Santos, Leonardo A.; et al. (August 2016), "The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars", Astronomy & Astrophysics, 592: 8, Bibcode:2016A&A...592A.156D, doi:10.1051/0004-6361/201628558, A156.
  4. ↑ 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. Bibcode:2010A&A...523A..15N. arXiv:1008.4600 Freely accessible. doi:10.1051/0004-6361/200913616.

Coordinates: 01h 07m 48.6625s, −08° 14′ 01.341″


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.