HD 196885
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Stern HD 196885 |
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| AladinLite | |||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | dolphin | ||||||||||||
| Right ascension | 20 h 39 m 51.88 s | ||||||||||||
| declination | + 11 ° 14 ′ 58.7 ″ | ||||||||||||
| Apparent brightness | 6.39 likes | ||||||||||||
| Typing | |||||||||||||
| Known exoplanets | 1 | ||||||||||||
| B − V color index | +0.55 | ||||||||||||
| U − B color index | +0.03 | ||||||||||||
| Spectral class | F8 IV | ||||||||||||
| Astrometry | |||||||||||||
| Radial velocity | (−32.8 ± 0.6) km / s | ||||||||||||
| parallax | (29.83 ± 0.48) mas | ||||||||||||
| distance | (109 ± 2) ly (33.5 ± 0.5) pc |
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| Visual absolute brightness M vis | +3.8 mag | ||||||||||||
| Proper movement | |||||||||||||
| Rec. Share: | (+47.34 ± 0.49) mas / a | ||||||||||||
| Dec. portion: | (+83.87 ± 0.30) mas / a | ||||||||||||
| Physical Properties | |||||||||||||
| Dimensions | approx. 1.3 M ☉ | ||||||||||||
| radius | approx. 1.4 R ☉ | ||||||||||||
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Other names and catalog entries |
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HD 196885 is a star in the constellation Dolphin . It is part of a binary star system . An exoplanet was discovered around the main star HD 196885 A. HD 196885 is around 110 light-years from the Sun and about 1.2 times as large.
Planets
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Exoplanet HD 196885 Ab |
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| Constellation | dolphin |
| Position equinox : J2000.0 |
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| Right ascension | 20h 39m 51.876s |
| declination | + 11 ° 14 ′ 58.74 ″ |
| Orbit data | |
| Central star | HD 196885 |
| Major semi-axis | 2.3 AU |
| eccentricity | 0.462 |
| Period of circulation | 1349 |
| Further data | |
| Minimum dimensions | 2.96 |
| distance | (33.5 ± 0.5) pc |
| history | |
The much better researched companion of HD 196885 is called HD 196885 Ab and is a planet that is at least three times as heavy as Jupiter (at least 2.96 times Jupiter's mass). It was discovered using the radial velocity method and takes 1,349 days to orbit the central star . At the moment (2013) it is only known about HD 196855 B that it is a red dwarf star .
Web links
- HD 196885 A ( Memento from June 9, 2012 in the Internet Archive )
- HD 196885 Ab ( Memento from June 14, 2012 in the Internet Archive )