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The Jupiter radius or Jovian radius (R J or R Jup) has a value of 71,492 km (44,423 mi), or 11.2 Earth radii (R 🜨) [2] (one Earth radius equals 0.08921 R J). The Jupiter radius is a unit of length used in astronomy to describe the radii of gas giants and some exoplanets. It is also used in describing brown dwarfs.
Jupiter is by far the most massive planet in the Solar System. It is approximately 2.5 times as massive as all of the other planets in the Solar System combined. [2] Jupiter mass is a common unit of mass in astronomy that is used to indicate the masses of other similarly-sized objects, including the outer planets, extrasolar planets, and brown ...
The choice of solar mass, M ☉, as the basic unit for planetary mass comes directly from the calculations used to determine planetary mass.In the most precise case, that of the Earth itself, the mass is known in terms of solar masses to twelve significant figures: the same mass, in terms of kilograms or other Earth-based units, is only known to five significant figures, which is less than a ...
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
[59] [60]: 6 Jupiter's radius is about one tenth the radius of the Sun, [61] and its mass is one thousandth the mass of the Sun, as the densities of the two bodies are similar. [62] A "Jupiter mass" (M J or M Jup) is used as a unit to describe masses of other objects, particularly extrasolar planets and brown dwarfs.
The solar mass (M ☉), 1.988 92 × 10 30 kg, is a standard way to express mass in astronomy, used to describe the masses of other stars and galaxies. It is equal to the mass of the Sun, about 333 000 times the mass of the Earth or 1 048 times the mass of Jupiter.
1 047.35 M J (Jupiter mass) It is also frequently useful in general relativity to express mass in units of length or time. M ☉ G / c 2 ≈ 1.48 km (half the Schwarzschild radius of the Sun) M ☉ G / c 3 ≈ 4.93 μs; The solar mass parameter (G·M ☉), as listed by the IAU Division I Working Group, has the following estimates: [20]
The survey revealed 540 planetary-mass objects, with 40 binary systems and 2 triplets among them. Each component has a mass between 0.7 and 13 Jupiter masses (M J), placing them in the planetary-mass regime. The binary pairs have separations ranging from 28 to 384 astronomical units. This discovery was unexpected because the proportion of ...