HD 196885
HD 196885 is a 6th magnitude binary star in the constellation Delphinus. According to its parallax of 29.83 milliarcseconds,[1] it is located at a distance of 109 light years from Earth. In 2004, a planet was announced to be orbiting the star in a 386-day orbit.[2] Follow-up work published in 2008 did not confirm the original candidate but instead found evidence of a planet in a 1349-day orbit.[3]
The star BD+10 4351B, located 192 arcseconds away from HD 196885 is located at the same distance and may be a physically bound companion star, in which case HD 196885 is a triple system.[4] If it is bound, then the separation is at least 6600 AU (the separation along the line-of-sight is unknown, so this value represents a lower limit on the true separation).
HD 196885 A
| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Delphinus |
| Right ascension | 20h 39m 51.8756s |
| Declination | +11° 14′ 58.737″ |
| Apparent magnitude (V) | 6.39 |
| Distance | 112 ly (34.3 pc) |
| Spectral type | F8IV |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 196885 A is an F6IV star. It has a mass of 1.33 solar masses and a radius of 1.79 times that of our Sun.[5]
Planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.96 MJ | 2.60[6] | 1349 | 0.48 ± 0.02 | — | — |
HD 196885 B
| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Delphinus |
| Right ascension | 20h 39m 51s |
| Declination | +11° 14′ 58″ |
| Distance | 112 ly (34.3 pc) |
| Spectral type | M1V |
HD 196885 B is a red dwarf star separated by 0.7 arcseconds from the primary star.[4] At a distance of 112 light years, this corresponds to a separation of 24 AU between the stars.[7] Since the separation along the line-of-sight is unknown, this represents a lower limit on the true separation.
See also
References
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- ↑ Lua error in package.lua at line 80: module 'strict' not found. (web preprint)
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External links
Coordinates: 
20h 39m 51.8756s, +11° 14′ 58.737″
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