Taphao Kaew
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Exoplanet Taphao Kaew |
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|---|---|
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47 UMa c.png |
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| Artist's impression of Taphao Kaew | |
| Constellation | Big Bear |
| Position equinox : J2000.0 |
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| Right ascension | 10h 59m 27.97s |
| declination | + 40 ° 25 ′ 48.9 ″ |
| Orbit data | |
| Central star | Chalawan |
| Major semi-axis | 3.6 ± 0.1 AU |
| eccentricity | 0.098 +0.047−0.096 |
| Period of circulation | 2391 +100−87 d |
| Further data | |
| Minimum dimensions | 0.540 +0.066−0.073 M J |
| distance | 14.06 ± 0.05 pc |
| history | |
| discovery | Fischer , Marcy , Butler, et al. |
| Date of discovery | 2001 |
| Catalog names | |
| 47 UMa c, Gliese 407 c, HR 4277 c, HD 95128 c | |
Taphao Kaew ( 47 Ursae Majoris c ) is a Exoplanet that the light around 46 years from the sun away Yellow Dwarf Chalawan in the constellation Big Bear orbits. It is the middle of the three known planets in the Chalawan planetary system .
discovery
The planet was discovered in 2001 using the radial velocity method based on measurements of Doppler velocity by a team of astronomers ( Debra Fischer , R. Paul Butler , Geoffrey Marcy , Gregory Laughlin , Steven Vogt ) at the Lick Observatory . A planet ( Taphao Thong ) was known around Chalawan since 1996 . Further measurements of the star's radial velocity revealed a periodicity that could be explained by a second planet. The Chalawan planetary system was the first known in which two planets orbit at least two AU from their central star.
properties
Taphao Kaew has a minimum mass of a little more than half the mass of Jupiter and orbits its central star in about 2391 days at a distance of about 3.6 AU. Due to the mass it can be assumed that it is a gas planet .
Origin of name
Like all exoplanets, Taphao Kaew was originally designated with the star's official name and a lowercase letter, according to the order in which it was discovered. After a public IAU competition , on December 15, 2015, it was given an official name after Taphao Kaew, one of two sisters from the Thai saga of the crocodile king Chalawan.
Individual evidence
- ↑ SIMBAD: 47 Ursae Majoris. Retrieved May 10, 2015 .
- ↑ a b c d e NASA Exoplanet Archive: 47 UMa c. Retrieved May 10, 2015 .
- ↑ a b Fischer, DA et al .: A Second Planet Orbiting 47 Ursae Majoris . bibcode : 2002ApJ ... 564.1028F .
- ↑ Gregory, PC; Fischer, DA: A Bayesian Periodogram Finds Evidence for Three Planets in 47 Ursae Majoris . arxiv : 1003.5549 .