HD 142415
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Norma |
| Right ascension | 15h 57m 40.7907s |
| Declination | −60º 12' 00.9256″ |
| Apparent magnitude (V) | 7.34 |
| Absolute magnitude (V) | 4.64 |
| Distance | 113 ly (34.6 pc) |
| Spectral type | G1V |
| Other designations | |
HD 142415 is a 7th magnitude yellow main-sequence star 113 light years from Earth in the southern constellation Norma. This star dwarfs the Sun in terms of mass (1.09x), size (1.03x), luminosity (1.1x), temperature (1.01x), and metallicity (1.62x). The age of the star is as young as 1.5 billion years.
The star currently has one planet.
[edit] HD 142415 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.07 AU |
| Eccentricity | (e) | 0.5 |
| Orbital period | (P) | 386.3±1.6 d |
| Angular distance | (θ) | 30.9 mas |
| Longitude of periastron |
(ω) | 255±4° |
| Time of periastron | (T0) | 2,451,519±4 JD |
| Semi-amplitude | (K) | 51.3±2.3 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.69 MJ |
| Discovery information | ||
| Discovery date | 2003 | |
| Discoverer(s) | Mayor et al. | |
| Detection method | doppler spectroscopy | |
| Discovery site | California, United States | |
| Discovery status | Published | |
HD 142415 b is an exoplanet with the semi-amplitude of 51.3±2.3 m/s. This indicates the minimum mass of 1.69 Jupiter mass, an orbital period of 386.3 days, and the semi-major axis of 1.07 astronomical units based from its stellar mass. The wild, oval pathed wobble of the star used by Doppler spectrometer indicates that the orbit of the planet is highly eccentric at around 50%.
The planet was discovered in California of the United States in 2003 by Mayor, who discovered 51 Pegasi b orbiting around 51 Pegasi back in 1995.
[edit] References
- Mayor et al. (2004). "The CORALIE survey for southern extra-solar planets. XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astron. & Astrophys. 415: 391-402.
[edit] External links
- HD 142415 -- Star. SIMBAD Astronomical Database. Retrieved on December 12, 2007.
- HD 142415b -- Extra-solar Planet Candidate. SIMBAD Astronomical Database. Retrieved on December 12, 2007.
- Notes for star HD 142415. The Extrasolar Planets Encyclopaedia. Retrieved on December 12, 2007.
- Notes for planet HD 142415 b. The Extrasolar Planets Encyclopaedia. Retrieved on December 12, 2007.
- HD 142415 -- Yellow Main Sequence. Extrasolar Visions. Retrieved on December 12, 2007.
- HD 142415 B -- Water Cloud Jovian, Eccentric. Extrasolar Visions. Retrieved on December 12, 2007.
- Star Table. Catalog of Nearby Exoplanets. Retrieved on December 12, 2007.
- Planet Table. Catalog of Nearby Exoplanet. Retrieved on December 12, 2007.
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