HD 195019
Double star HD 195019 |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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AladinLite | ||||||||||||||||||||
Constellation | dolphin | |||||||||||||||||||
Right ascension | 20 h 28 m 19 s | |||||||||||||||||||
declination | + 18 ° 46 ′ 10 ″ | |||||||||||||||||||
Apparent brightness | 6.9 likes | |||||||||||||||||||
Known exoplanets |
1 |
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Astrometry | ||||||||||||||||||||
Radial velocity | (−93 ± 2) km / s | |||||||||||||||||||
parallax | (26.77 ± 0.89) mas | |||||||||||||||||||
distance | (122 ± 4) ly ((37.4 ± 1.2) pc ) |
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Individual data | ||||||||||||||||||||
Names | A; B. | |||||||||||||||||||
Observation data: | ||||||||||||||||||||
Apparent brightness | A. | 6.9 likes | ||||||||||||||||||
B. | about 10 mag | |||||||||||||||||||
Typing: | ||||||||||||||||||||
Spectral class | A. | G3 IV-V | ||||||||||||||||||
Physical Properties: | ||||||||||||||||||||
Dimensions | A. | approx. (0.98 ± 0.06) M ☉ | ||||||||||||||||||
B. | ||||||||||||||||||||
Other names and catalog entries |
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HD 195019 is a star system in the dolphin constellation about 37 parsecs away . It consists of two stars at an angular distance of 4 ", 1 (approx. 150 AU) with a position angle of 324 °. In addition, the main component is circled by a spectroscopic companion, which is a potential exoplanet. The central star has one Apparent brightness of 6.9 mag and belongs to the spectral class G3 IV-V, its mass corresponds roughly to that of the sun .
Potential exoplanet
HD 195019 b is a potential exoplanet that orbits the main component with a period of 18 days, its orbit having a slight eccentricity of about 0.01. Its minimum mass is (3.7 ± 0.3) Jupiter masses. It could be a " Hot Jupiter " with an estimated mean surface temperature of 755 Kelvin . The property was built in 1998 by Geoffrey Marcy et al. discovered with the radial velocity measurement method.