Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Draco |
Right ascension | 18h 59m 08.684s[1] |
Declination | 48° 25′ 23.60″[1] |
Apparent magnitude (V) | 8.83[2] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | F8V[3] |
B−V color index | 0.51[4] |
Astrometry | |
Radial velocity (Rv) | −54.76±0.18[5] km/s |
Proper motion (μ) | RA: 4.704±0.013 mas/yr[1] Dec.: 9.263±0.016 mas/yr[1] |
Parallax (π) | 11.2176 ± 0.0126 mas[1] |
Distance | 290.8 ± 0.3 ly (89.1 ± 0.1 pc) |
Details[6] | |
Mass | 1.05±0.04 M☉ |
Radius | 1.253±0.051 R☉ |
Luminosity | 1.864[7] L☉ |
Surface gravity (log g) | 4.318+0.08 −0.089 cgs |
Temperature | 6,080±65 K |
Metallicity [Fe/H] | −0.138+0.043 −0.042 dex |
Rotation | 12.89±0.19 d |
Rotational velocity (v sin i) | 2.8±1.0 km/s |
Age | 7.15±1.61[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 176693, also known as Kepler-408, is a star with a close orbiting exoplanet in the northern constellation of Draco. It is located at a distance of 291 light years from the Sun based on parallax measurements, but it is drifting closer with a radial velocity of −55 km/s.[5] The star is predicted to come as close as 23.1 light-years in 1.6 million years.[9] It has an apparent visual magnitude of 8.83,[2] which is too faint to be viewed with the naked eye.
The spectrum of HD 176693 matches an F-type main-sequence star with a stellar classification of F8V.[3] The star is older than the Sun, at 7.15 billion years. It is slightly and uniformly[10] depleted in heavy elements compared to the Sun, having about 75% of the solar abundance of iron and other heavy elements.[6] HD 176693 is a chromospherically inactive star,[4] although there is weak evidence for tidal spin-up due to star-planet interaction.[11]
HD 176693 is 5% more massive than the Sun and has a 25% larger radius.[6] It is radiating 1.9[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,080 K. The star is spinning with a rotation period of 12.89 days.[6] As of 2016, multiplicity surveys have not detect any stellar companions to HD 176693.[12]
GaiaDR3
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