| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1. An extrasolar planet, or exoplanet, is a Planet beyond the Solar System, orbiting around other Stars As of September 2008 312 The following are lists of stars with confirmed Extrasolar planets. The elements of an orbit are the parameters needed to specify that Orbit uniquely given a model of two point-masses obeying the Newtonian laws of motion and the In Geometry, the semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae 93 AU |
| Eccentricity | (e) | 0. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the In Astrodynamics, under standard assumptions, any Orbit must be of Conic section shape 40±0. 07 |
| Orbital period | (P) | 711±8 d |
| Angular distance | (θ) | 29. The orbital period is the time taken for a given object to make one complete Orbit about another object A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the In Mathematics (in particular Geometry and Trigonometry) and all Natural sciences (including astronomy geophysics etc the angular distance 023 mas |
| Longitude of periastron |
(ω) | 351. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. In Astrodynamics, the longitude of the periapsis (symbolized \varpi of an orbiting body is the Longitude (measured from the point of the vernal equinox In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 5±9. 5° |
| Time of periastron | (T0) | 2,451,420 JD |
| Semi-amplitude | (K) | 105±8 m/s |
| Physical characteristics | ||
| Mass | (m) | >6. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from The Julian date (JD is the interval of time in days and fractions of a day since 4713 B Amplitude is the magnitude of change in the oscillating variable with each Oscillation, within an oscillating system Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object 54 MJ |
| Discovery information | ||
| Discovery date | May 25, 2005 | |
| Discoverer(s) | Setiawan et al. Jupiter mass is the unit of Mass equal to one Jupiter (18986 × 1027 kg, 317 | |
| Detection method | Radial velocity | |
| Discovery site | La Silla, Chile | |
| Discovery status | Published | |
Eta2 Hydri b (also known as HD 11977 b) is an extrasolar planet orbiting Eta2 Hydri. Any Planet is an extremely faint light source compared to its parent Star. Radial velocity is the Velocity of an object in the direction of the line of sight (i La Silla Observatory is an astronomical observatory in Chile with eighteen telescopes Chile, officially the Republic of Chile ( Spanish:) is a country in South America occupying a long and narrow Coastal strip wedged between the An extrasolar planet, or exoplanet, is a Planet beyond the Solar System, orbiting around other Stars As of September 2008 312 The presence of the planet around an intermediate-mass giant star provides indirect evidence for the existence of planetary systems around A-type stars. A giant star is a Star with substantially larger Radius and Luminosity than a Main sequence star of the same surface temperature.
References
- Setiawan, J. , Rodmann, J. , da Silva, L. , Hatzes, A. , Pasquini, L. , von der Lühe, O. , de Medeiros, J. , Döllinger, M. , Girardi, L. (2005). Year 2005 ( MMV) was a Common year starting on Saturday (link displays full calendar of the Gregorian calendar. "A substellar companion around the intermediate-mass giant star HD 11977". Astronomy & Astrophysics 437: L31 – L34. Astronomy and Astrophysics (abbreviated as A&A in the astronomical literature or else Astron doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
External links
- Extrasolar Planets Encyclopaedia: Notes for planet HD 11977 b
- Extrasolar Visions: HD 11977 b
- HD 11977 b, a planet around a giant star
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