14 Herculis
From Wikipedia, the free encyclopedia
 14 Herculis |
|
| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Hercules |
| Right ascension | 16h 10m 23.59s |
| Declination | +43° 49′ 18.2″ |
| Apparent magnitude (V) | +6.67 |
| Characteristics | |
| Spectral type | K0V |
| U-B color index | 0.67 |
| B-V color index | 0.88 |
| V-R color index | ? |
| R-I color index | ? |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | −5.5 km/s |
| Proper motion (μ) | RA: 132.52 mas/yr Dec.: −298.38 mas/yr |
| Parallax (π) | 55.11 ± .59 mas |
| Distance | 59 ly (18.1 pc) |
| Absolute magnitude (MV) | +5.38 |
| Details | |
| Mass | 1 M☉ |
| Radius | 1.05 R☉ |
| Surface gravity (log g) | 4.315 |
| Luminosity | 0.75 L☉ |
| Temperature | 5250 K |
| Metallicity | 0.35 [Fe/H] |
| Rotation | ? |
| Age | 3900 million years |
| Other designations | |
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HD 145675, HIP 79248, Gl 614
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14 Herculis is an orange dwarf star approximately 59 light-years away in the constellation Hercules. It cannot be seen with the naked eye. It is also known by the designation Gliese 614.
In 1998 an extrasolar planet was discovered to orbit 14 Herculis, which received the designation 14 Herculis b.[1] The planet is located in an eccentric, long-period orbit which takes around 4.8 years to complete.[2] In 2006, a possible second planet was proposed, designated 14 Herculis c.[3] The parameters of this planet are uncertain, but a recent analysis suggests it may lie in the 4:1 resonance with the inner planet, with an orbital period of almost 19 years at an orbital distance of 6.9 AU.[2]
| Planet (in order from star) |
Mass (MJ) |
Orbital period (days) |
Semimajor axis (AU) |
Eccentricity |
|---|---|---|---|---|
| b | >4.64 ± 0.19 | 1773.4 ± 2.5 | 2.77 ± 0.05 | 0.369 ± 0.005 |
| c | >2.1 | 6906 ± 60 | 6.9 | 0 |
[edit] See also
[edit] References
- ^ Mayor, M. et al. (1998). "Searching for giant planets at the Haute-Provence Observatory" in IAU Colloqu. 170. (ed. Hearnshaw, J. B. and Scarfe, C. D.) Precise Stellar Radial Velocities, San Francisco: ASP.
- ^ a b Wittenmyer, R. A., Endl, M., Cochran, W. D. (2007). "Long-Period Objects in the Extrasolar Planetary Systems 47 Ursae Majoris and 14 Herculis". The Astrophysical Journal 654 (1): 625 – 632.
- ^ Goździewski, K., Konacki, M., Maciejewski, A. J. (2006). "Orbital Configurations and Dynamical Stability of Multiplanet Systems around Sun-like Stars HD 202206, 14 Herculis, HD 37124, and HD 108874". The Astrophysical Journal 645 (1): 688 – 703.
[edit] External links
- HD 145675. SIMBAD. Retrieved on 14 April, 2006.
- 14 Herculis. Solstation. Retrieved on 20 June, 2007.
- Notes for star 14 Her. The Extrasolar Planets Encyclopaedia. Retrieved on 14 April, 2006.
- New Worlds Atlas. Retrieved on 14 April, 2006.
