HD 190647
Stern HD 190647 |
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AladinLite | |||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Sagittarius | ||||||||
Right ascension | 20 h 07 m 19.67 s | ||||||||
declination | -35 ° 32 ′ 19.1 ″ | ||||||||
Apparent brightness | 7.78 likes | ||||||||
Typing | |||||||||
Known exoplanets | 1 | ||||||||
B − V color index | (+0.743 ± 0.002) | ||||||||
Spectral class | G5 V | ||||||||
Astrometry | |||||||||
Radial velocity | (−40.3 ± 0.3) km / s | ||||||||
parallax | (17.46 ± 0.81) mas | ||||||||
distance | (187 ± 9) ly (57.3 ± 2.7) pc |
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Visual absolute brightness M vis | +4.0 mag | ||||||||
Proper movement | |||||||||
Rec. Share: | (−28.38 ± 0.90) mas / a | ||||||||
Dec. portion: | (−207.57 ± 0.83) mas / a | ||||||||
Physical Properties | |||||||||
Dimensions | 1.1 M ☉ | ||||||||
Effective temperature | approx. 5600 K | ||||||||
Metallicity [Fe / H] | 0.24 ± 0.03 | ||||||||
Age | > 2 billion a | ||||||||
Other names and catalog entries |
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annotation | |||||||||
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HD 190647 is a main sequence star of spectral class G5 in Sagittarius, about 190 light years from Earth . It has an apparent magnitude of 7.78 mag. In 2007 Dominique Naef discovered an extrasolar planet orbiting this star. This is called HD 190647 b .