The proper orbital elements or proper elements of an orbit are constants of motion of an object in space that remain practically unchanged over an astronomically long timescale. The term is usually used to describe the three quantities: proper...
Orbital elements are the parameters required to uniquely identify a specific orbit. In celestial mechanics these elements are considered in two-body systems using a Kepler orbit. There are many different ways to mathematically describe the same...
Ceres is a dwarf planet in the main asteroid belt between the orbits of Mars and Jupiter. It was the first object identified in the asteroid belt, discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily, and...
The Nysa–Polana complex (also known as the Nysa–Polana family, Nysa–Polana clan, or Nysa–Polana–Hertha complex) is a group of overlapping asteroid families in the low-inclination region of the inner main asteroid belt. In terms of proper orbital...
Juno (minor-planet designation: 3 Juno) is a large asteroid in the asteroid belt. Juno was the third asteroid discovered, in 1804, by German astronomer Karl Harding. It is tied with three other asteroids as the thirteenth largest asteroid, and it is...
There are 115 known moons of the planet Jupiter as of 9 April 2026. This number does not include a number of meter-sized moonlets thought to be shed from the inner moons, nor hundreds of possible kilometer-sized outer irregular moons that were only...
The Pallas family (adj. Palladian; FIN: 801) is a small asteroid family of B-type asteroids at very high inclinations in the intermediate asteroid belt. The family was identified by Kiyotsugu Hirayama in 1928.
44 Nysa is an asteroid located in the inner region of the main asteroid belt. It is the largest, brightest, and first confirmed E-type asteroid, a rare type of asteroid with a highly reflective surface rich in enstatite. It was discovered by Hermann...
In astronomy and astrodynamics the osculating orbit of an object in space at a given moment in time is the orbit it would have around its central body if perturbations were absent. It is the orbit that coincides with the current position and...
7 Iris is a large main-belt asteroid and possible remnant planetesimal orbiting the Sun between Mars and Jupiter. It is the fourth-brightest object in the asteroid belt. 7 Iris is classified as an S-type asteroid, meaning that it has a stony...
