| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Hydra |
| Right ascension | 14h 02m 22. The Henry Draper Catalogue ( HD) is an Astronomical Star catalogue published between 1918 and 1924 giving Spectroscopic classifications In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Each culture has its own Constellations usually based on Mythology. Hydra (ˈhaɪdrə is the largest of the 88 modern Constellations and was also one of the 48 constellations listed by Ptolemy. Right ascension (abbrev RA; symbol α) is the Astronomical term for one of the two Coordinates of a point on the Celestial sphere 782s |
| Declination | −27º 25' 47. In Astronomy, declination (abbrev dec or δ) is one of the two coordinates of the Equatorial coordinate system, the other being either 18″ |
| Apparent magnitude (V) | 5. The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 48 |
| Absolute magnitude (V) | -0. In Astronomy, absolute magnitude (also known as absolute visual magnitude) is the Apparent magnitude an object would have if it were at a standard 17 |
| Distance | 440 ly (135 pc) |
| Spectral type | K3III |
| Other designations | |
HD 122430 is an orange giant star located in the constellation Hydra on the celestial sphere. The cosmic distance ladder (also known as the Extragalactic Distance Scale) is the succession of methods by which astronomers determine the Distances to celestial A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by History The first direct measurements of an object at interstellar distances were undertaken by German Astronomer Friedrich Wilhelm Bessel in 1838 In Astronomy, stellar classification is a classification of Stars based initially on photospheric temperature and its associated Spectral characteristics A star catalogue, or star catalog, is an Astronomical catalogue that lists Stars In Astronomy, many stars are referred to simply by catalogue In Astronomy, Durchmusterung or Bonner Durchmusterung ( BD) is the usual name for three comprehensive astrometric Star catalogues The Hipparcos and Tycho Catalogues (Tycho-1 are the primary products of the European Space Agency 's astrometric mission Hipparcos. The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a Star catalogue that lists of all stars of The Smithsonian Astrophysical Observatory Star Catalog is an astrometric Star catalogue. A giant star is a Star with substantially larger Radius and Luminosity than a Main sequence star of the same surface temperature. In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Hydra (ˈhaɪdrə is the largest of the 88 modern Constellations and was also one of the 48 constellations listed by Ptolemy. In Astronomy and Navigation, the celestial sphere is an imaginary rotating Sphere of "gigantic Radius " The star has completely run out of the hydrogen fuel, which keeps the star stable, although its age is only 3. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Fuel is any material that is burned or altered in order to obtain energy 1 billion years old, younger than the Sun’s 4. 6 billion years. HD122430 has a mass of 1. 4 times and radius of 22. 9 times that of the sun. Despite its younger age, it has slightly lower metallicity, approximately 90%. The temperature of its surface [photosphere] is approximately 4300 Kelvins. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic
HD 122430 b
| 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 02 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 68±0. 09 |
| Orbital period | (P) | 344. The orbital period is the time taken for a given object to make one complete Orbit about another object 95±1. 08 d |
| Angular distance | (θ) | 7. 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 56 mas |
| Longitude of periastron |
(ω) | 91. 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 04±17. 27° |
| Time of periastron | (T0) | 2451986. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 71±3. 75 JD |
| Semi-amplitude | (K) | 2. 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 02 m/s |
| Physical characteristics | ||
| Mass | (m) | >3. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object 71 MJ |
| Discovery information | ||
| Discovery date | 2003 | |
| 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 | Spain | |
| Discovery status | Published | |
HD 122430 b is a giant planet orbiting around the giant star HD 122430. 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 Spain () or the Kingdom of Spain (Reino de España is a country located mostly in southwestern Europe on the Iberian Peninsula. A gas giant (sometimes also known as a Jovian planet after the planet Jupiter, or giant planet) is a large Planet that is not primarily A giant star is a Star with substantially larger Radius and Luminosity than a Main sequence star of the same surface temperature. It is a superjovian-type with mass greater than 3. 71 times that of Jupiter. This planet located at a distance of 1. 02 astronomical units away from its star, which is very similar to the Earth’s distance from the Sun. 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 Despite of this, the planet is too hot for it to have liquid water or life on any of the planet’s moons. An extrasolar moon, or exomoon, is a term that refers to a smaller natural (non-man-made Satellite Also, its orbit is highly eccentric, around 68%. At periastron, the orbital distance from its parent star is 0. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 33 AU. At apastron, the distance is 1. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 71 AU. If this planet were located in our own solar system, its orbit would ranges from just within Mercury’s orbit to just beyond Mars’s orbit. The Solar System consists of the Sun and those celestial objects bound to it by Gravity.
In Spain, Setiawan discovered this planet in 2003, using his radial velocity method. Spain () or the Kingdom of Spain (Reino de España is a country located mostly in southwestern Europe on the Iberian Peninsula. Any Planet is an extremely faint light source compared to its parent Star.
References
- Setiawan, J. (2003). "Planets around evolved stars": 595-598.
External links
- Notes for star HD 122430. The Extrasolar Planets Encyclopaedia. Retrieved on December 7, 2007. Events 43 BC - Marcus Tullius Cicero assassinated 1696 - Connecticut Route 108, one of the oldest highways Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century.
- Notes for planet HD 122430 b. The Extrasolar Planets Encyclopaedia. Retrieved on December 7, 2007. Events 43 BC - Marcus Tullius Cicero assassinated 1696 - Connecticut Route 108, one of the oldest highways Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century.
- HD 122430 -- Star. SIMBAD. Retrieved on December 7, 2007. Events 43 BC - Marcus Tullius Cicero assassinated 1696 - Connecticut Route 108, one of the oldest highways Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century.