| Discovery | |
|---|---|
| Discovered by | Vogt et al. |
| Discovery site |  California, United States |
| Discovery date | June 24, 2005 |
| Doppler spectroscopy | |
| Orbital characteristics[1] | |
| Apastron | 2.02 AU (302,000,000 km) |
| Periastron | 1.46 AU (218,000,000 km) |
| 1.740 ± 0.010 AU (260,300,000 ± 1,500,000 km) | |
| Eccentricity | 0.159±0.006 |
| 921.538 ± 1.15 d (2.52303 ± 0.00315 a) | |
Average orbital speed | 20.7 |
| Inclination | 55.950±14.553 |
| 229.392±14.473 | |
| 2449565.615±18.01 | |
| 15.445±6.87 | |
| Semi-amplitude | 74.799±1.497 |
| Star | HD 128311 |
| Physical characteristics[1] | |
| Mass | 3.789+0.924 −0.432 MJ |
HD 128311 c is an exoplanet located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit at 1.74 AU from its star (HD 128311). The planet has a minimum mass of 3.22 MJ,[2] and astrometric observations in 2014 revealed its true mass to be 3.789 MJ.[1]
References[edit]
- ^ a b c McArthur, Barbara E.; et al. (2014). "Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT". The Astrophysical Journal. 795 (1): 41. Bibcode:2014ApJ...795...41M. doi:10.1088/0004-637X/795/1/41. S2CID 122980723.
- ^ Vogt, Steven S.; et al. (2005). "Five New Multicomponent Planetary Systems" (PDF). The Astrophysical Journal. 632 (1): 638–658. Bibcode:2005ApJ...632..638V. doi:10.1086/432901. S2CID 16509245.
External links[edit]
- "Notes for planet HD 128311 c". Extrasolar Planets Encyclopaedia. Retrieved 2008-08-18.
- "HD 128311". Exoplanets. Archived from the original on 2008-05-14. Retrieved 2008-08-18.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction