38 Virginis b
Discovery | |
---|---|
Discovery date | 29 August 2016 |
radial velocity | |
Orbital characteristics | |
1.82 (± 0.07) AU[1] | |
Eccentricity | 0.03 (± 0.04)[1] |
825.9 (± 6.2)[1] d | |
2455490.2 ± 177.3[1] | |
−87.3 ± 77.7[1] | |
Star | 38 Virginis |
Physical characteristics | |
Mass | 4.51 (± 0.5)[1] MJ |
38 Virginis b is a
parent star.Characteristics
Mass
38 Virginis b is a super-Jupiter, an exoplanet that has a mass larger than that of the planet Jupiter. It has a minimum mass of 4.51 MJ.[1]
Host star
The planet orbits a (F-type) star named 38 Virginis. The star has a mass of 1.18 M☉ and a radius of around 1.46 R☉. It has a temperature of 6557 K and is about 1.9 billion years old. In comparison, the Sun is about 4.6 billion years old[2] and has a temperature of 5778 K.[3] The star is metal-rich, with a metallicity ([Fe/H]) of 0.16, or 117% the solar amount. Its luminosity (L☉) is 3.48 times that of the Sun.[note 1]
The star's apparent magnitude, or how bright it appears from Earth's perspective, is 6.11. Therefore, 38 Virginis is on the edge of not being visible to the naked eye, but it can be clearly spotted with binoculars.
Orbit
38 Virginis b orbits its star every 825 days at a distance of 1.82
Discovery
The search for 38 Virginis b started when its host star was chosen an ideal target for a planet search using the
The discovery of 38 Virginis b was reported in the online archive arXiv on August 29, 2016.
Notes
- ^ From , where is the luminosity, is the radius, is the effective surface temperature and is the Stefan–Boltzmann constant.
References
- ^ .
- ^ Fraser Cain (16 September 2008). "How Old is the Sun?". Universe Today. Retrieved 19 February 2011.
- ^ Fraser Cain (September 15, 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.