HD 65216
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 7.97[2] |
| Characteristics | |
| Spectral type | G5V[3] + M7–8 + L2–3[4] |
| B−V Template:Engvar | 0.672±0.012[2] |
| Astrometry | |
| Radial velocity (Rv) | 42.57±0.16[1] km/s |
| Proper motion (μ) | RA: −123.633±0.065 mas/yr[1] Dec.: 146.578±0.073 mas/yr[1] |
| Parallax (π) | 28.4445±0.0317 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 5.22[2] |
| Details | |
| HD 65216 A | |
| Mass | 0.95±0.01[5] Template:Solar mass |
| Radius | 0.864±0.003[5] Template:Solar radius |
| Luminosity | 0.716±0.001[5] Template:Solar luminosity |
| Surface gravity (log g) | 4.53±0.01[5] cgs |
| Temperature | 5,718±8[5] K |
| Metallicity [Fe/H] | −0.17[6] dex |
| Rotational velocity (v sin i) | 1.308[6] km/s |
| Age | 1.7±0.5[5] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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HD 65216 is a triple[4] star system with two exoplanetary companions in the southern constellation of Carina. With an apparent visual magnitude of 7.97[2] it cannot be readily seen without technical aid, but with binoculars or telescope it should be visible. The system is located at a distance of 114.7 light-years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 42.6 km/s.[1]
The primary, component A, is an ordinary G-type main-sequence star with a stellar classification of G5V.[3] It is nearly two billion years old[5] and is spinning with a projected rotational velocity of 1.3 km/s.[6] The star has 95% of the mass and 86% of the radius of the Sun. It is radiating 72% of the luminosity of the Sun from its photosphere at an effective temperature of 5,718 K.[5]
In 2008 a co-moving binary system of low mass companions were discovered at an angular separation of Script error: No such module "val". from the primary, which is equivalent to a projected separation of Script error: No such module "val". at the distance of HD 65216. Component B is of class M7–8 (Script error: No such module "val".) while component C is class L2–3 (Script error: No such module "val".); both have a mass close to the sub-stellar limit. The pair have a projected separation of Script error: No such module "val". from each other.[4]
Planetary system
An extrasolar planet (designated as HD 65216 b) was discovered orbiting the primary in 2003.[8] A second much more distant planet was suspected since 2013,[9] but was discovered on a completely different orbit in 2019.[10]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet Template:OrbitboxPlanet
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See also
References
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External links
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