HD 65216
From Wikipedia, the free encyclopedia
| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Carina |
| Right ascension | 7h 53m 41.32s |
| Declination | -63° 38' 50.36" |
| Apparent magnitude (V) | 7.98 |
| Distance | 116.0 ly (35.59 pc) |
| Spectral type | G5V |
| Other designations | |
|
CD-63°359, HIP 38558
|
|
HD 65216 is an 8th magnitude star in the constellation of Carina. It is a Sun-like yellow dwarf, 8% less massive and somewhat less luminous. It cannot be seen without technical aid, but with binoculars or telescope it should be visible.
An extrasolar planet is known to orbit the star.
[edit] HD 65216 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.374±0.082 AU |
| Eccentricity | (e) | 0.41±0.06 |
| Orbital period | (P) | 613±11 d |
| Angular distance | (θ) | 40 mas |
| Longitude of periastron |
(ω) | 198±6° |
| Time of periastron | (T0) | 2,450,762±25 JD |
| Semi-amplitude | (K) | 33.7±1.1 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.22±0.19 MJ |
| Discovery information | ||
| Discovery date | 2003 | |
| Discoverer(s) | Mayor, Urdy, Naef et al. |
|
| Detection method | Radial velocity | |
| Discovery status | Published | |
The planet, designated as HD 65216 b, was discovered by the Geneva Extrasolar Planet Search Team in 2003. Like most planet candidates so far, it was detected with the radial velocity method.
The planet has a minimum mass about 20% more than Jupiter. Since the discovery method gives only the minimum mass, its true mass is probably slightly greater. The planet orbits the star in a very eccentric orbit. The mean distance from the star is slightly less than that of Mars from the Sun, but at periastron the planet is a fifth closer to the star than Earth from the Sun and at apoastron it is over twice as far.
[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" (abstract). Astronomy and Astrophysics 415: 391-402. doi:.
[edit] External links
- SIMBAD star entry, planet entry
- The Extrasolar Planets Encyclopaedia entry
- Extrasolar Visions entry
- Geneva Observatory data
 |
This main sequence star-related article is a stub. You can help Wikipedia by expanding it. |
