HD 168746

HD 168746
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 18h 21m 49.7827s[1]
Declination −11° 55′ 21.652″[1]
Apparent magnitude (V) 7.95[2]
Characteristics
Spectral type G5V[2]
B−V color index 0.713[3]
Astrometry
Proper motion (μ) RA: −22.946±0.054[1] mas/yr
Dec.: −68.402±0.040[1] mas/yr
Parallax (π)23.79 ± 0.31[1] mas
Distance137 ± 2 ly
(42.0 ± 0.5 pc)
Details[3]
Mass0.88±0.01 M☉
Luminosity1.10 L☉
Surface gravity (log g)4.50±0.15 cgs
Temperature5610±30 K
Metallicity [Fe/H]−0.06±0.05 dex
Rotational velocity (v sin i)1.0 km/s
Other designations
BD-11° 4606, HIP 90004[2]
Database references
SIMBADdata
Exoplanet Archivedata

HD 168746 is an 8th magnitude star in the constellation of Serpens. It is very similar to our Sun, a yellow dwarf star (spectral class G5V). It is not visible to the unaided eye, but is easily visible with binoculars or a small telescope. In 2000 a planet was announced orbiting it.[4]

The HD 168746 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.23 MJ 0.065 6.403 ± 0.001 0.081 ± 0.029 — —

See also

References

  1. 1 2 3 4 5 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
  2. 1 2 3 "HD 168746". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-05.
  3. 1 2 3 Pepe, F.; et al. (2002). "The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD 108147 and HD 168746". Astronomy and Astrophysics. 388 (2): 632–638. arXiv:astro-ph/0202457. Bibcode:2002A&A...388..632P. doi:10.1051/0004-6361:20020433.
  4. ↑ "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.

Coordinates: 18h 21m 49.7832s, −11° 55′ 21.660″


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