HD 178911
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 09m 04.3838s |
| Declination | +34° 36′ 01.625″ |
| Apparent magnitude (V) | 6.74 |
| Distance | 160 ly (49.0 pc) |
| Spectral type | G1V |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 178911 is a triple star system in the constellation Lyra. The secondary star (designated as HD 178911 B) has an apparent magnitude of 6.74 and a spectral type of G1V, which is very similar to our Sun at a distance of 160 light years. The age of the star is slightly older and have significantly higher metallicity than our Sun.
Stellar system
The HD 178911 system consists of HD 178911A and HD 178911B in a 1300 day orbit with HD 178911B being a more distant common proper motion companion and HD 178911A is in fact a tight binary pair consisting of HD 178911Aa and Ab.[1] An additional companion HD 178911C is a chance optical alignment and is not part of the system.[2]
Planetary system
In 2001 an extrasolar planet was discovered in orbit around HD 178911B.[3][4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >7.35 ± 0.60 MJ | 0.345 ± 0.20 | 71.511 ± 0.011 | 0.139 ± 0.014 | — | — |
See also
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
Coordinates: 
19h 09m 04.3838s, +34° 36′ 01.625″
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |
