# What is the semi-major axis of the planets?

## What is the semi-major axis of the planets?

Orbital Data for the Planets & Dwarf Planets

Planet Semimajor Axis (AU) Orbital Speed (km/s)
Earth 1.000 29.8
Mars 1.5273 24.1
Jupiter 5

What is the semi-major axis of the orbit of the planet in astronomical units?

Semi-major and semi-minor axes of the planets’ orbits

Eccentricity Semi-major axis a (AU)
Venus 0.007 0.72300
Earth 0.017 1.00000
Mars 0.093 1.52400
Jupiter 0.049 5

What is the sun’s semi-major axis?

Semimajor axis = 1.524 A.U. A line from the Sun to a planet sweeps out equal areas in equal time intervals.

### Is the semi-major axis of Earth 1 AU?

Notes: Distance is the semi-major axis in astronomical units (1 A.U….Planets: Orbital Properties.

Planet Earth 1.000 365.256 d 0.0167 0.0000

How is semi-major axis calculated?

The semi-major axis is half of the major axis. To find the length of the semi-major axis, we can use the following formula: Length of the semi-major axis = (AF + AG) / 2, where A is any point on the ellipse, and F and G are the foci of the ellipse.

What is semi-major axis in physics?

For any ellipse, the semi-major axis is defined as one-half the sum of the perihelion and the aphelion. In (Figure), the semi-major axis is the distance from the origin to either side of the ellipse along the x-axis, or just one-half the longest axis (called the major axis).

#### How long is semi-major axis?

Events in the orbit

epoch J2000.0
semimajor axis 149.60×106 km (92.96×106 mi) 1.000001018 AU
eccentricity 0.0167086
inclination 7.155° to Sun’s equator 1.578690° to invariable plane
longitude of the ascending node 174.9°

What is its semi-major axis in AU?

The semi-major axis for the highly elliptical orbit of Halley’s comet is 17.8 AU and is the average of the perihelion and aphelion. This lies between the 9.5 AU and 19 AU orbital radii for Saturn and Uranus, respectively.

What is the axis tilt of the planets?

Axis and rotation of selected Solar System bodies

Body NASA, J2000.0
Axial tilt (degrees) North Pole
Mercury 0.03 281.01
Venus 2.64 272.76
Earth 23.44 0.00

## What does the semimajor axis of a dwarf planet mean?

Dwarf Planets. * Negative values of rotation period indicate that the planet rotates in the direction opposite to that in which it orbits the Sun. This is called retrograde rotation. The semimajor axis (the average distance to the Sun) is given in units of the Earth’s average distance to the Sun, which is called an AU.

How big is the semimajor axis of the Sun?

Semimajor Axis of the Planets and the Sun (Solar System) Rank Name Semimajor Axis (kilometer) 6 Mars 2.2792 x 108 7 Earth 1.496 x 108 8 Venus 1.0821 x 108 8 Mercury 5.791 x 107

Which is the most semimajor planet in the universe?

Orbital Data for the Planets & Dwarf Planets Planet Semimajor Axis ( AU) Orbital Period ( yr) Orbital Speed ( km/s) Orbital Eccentricity ( e) Mercury 0.3871 0.2408 47.9 0

### How is the semi major axis used in geometry?

Semimajor Axis. In geometry, the semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae and is marked as a as shown below. 