47 Ursae Majoris d
|
Exoplanet 47 Ursae Majoris d |
|
|---|---|
| Constellation | Big Bear |
| Position equinox : J2000.0 |
|
| Right ascension | 10h 59m 27.97s |
| declination | + 40 ° 25 ′ 48.9 ″ |
| Orbit data | |
| Central star | Chalawan |
| Major semi-axis | 11.6 +2.1−2.9 AE |
| eccentricity | 0.16 +0.09−0.16 |
| Period of circulation | 14002 +4018−5095 d |
| Further data | |
| Minimum dimensions | 1.64 +0.29−0.48 M J |
| history | |
| discovery | Philip C. Gregory , Debra Fischer |
| Date of discovery | 2010 |
| Catalog names | |
| 47 UMa d, Gliese 407 d, HR 4277 d, HD 95128 d | |
47 Ursae Majoris d is an exoplanet that the approximately 46 light-years from the sun away Yellow Dwarf Chalawan in the constellation Ursa Major orbits. It is the outer of the three known planets in the Chalawan planetary system .
discovery
The discovery of the planet was published by the two astronomers Philip C. Gregory and Debra Fischer in March 2010 based on the radial velocity method . Up to this point in time, Taphao Thong and Taphao Kaew , two planets around the star, were already known. An analysis of the radial velocity data of Chalawan with the help of Bayesian statistics not only confirmed and refined the values of the two known planets, but also a planetary system with three planets appeared as the most likely by far.
properties
47 Ursae Majoris d has a minimum mass of around 1.64 Jupiter's masses and orbits its central star in around 14002 days at a distance of around 11.6 AU . As with the two other planets of the star, the minimum mass suggests that it must be a gas planet . At the time of its discovery, it was the exoplanet with the longest orbital period (a little over 38 years), which had been discovered using the radial velocity method.
Individual evidence
- ↑ SIMBAD: 47 Ursae Majoris. Retrieved May 10, 2015 .
- ↑ a b c d NASA Exoplanet Archive: 47 UMa d. Retrieved May 10, 2015 .
- ↑ a b c Gregory, PC; Fischer, DA: A Bayesian Periodogram Finds Evidence for Three Planets in 47 Ursae Majoris . March 20, 2010, doi : 10.1111 / j.1365-2966.2009.16233.x , arxiv : 1003.5549 .