There is not a way to tell how many km are from the sun to Sedna. It is a long distence from the sun to Sedna.
Its speed will vary greatly as its orbit is highly eccentric. It will be slower when further out from the sun on its 11,000 year orbit. Its average speed is around 1.04 km/s.
Sedna's average distance from the sun is about 86 Astronomical Units.
No. Sedna orbits the sun.
no
The sun is about 15,000 km big
Sedna is a dwarf planet. It is to far away to be one of plutos moons and is proved to orbit the sun
The heliosphere starts right here (or, you might say, at the Sun). Sedna is much further out. However, the heliosphere extends far out beyond Pluto. So the outer boundary of the heliosphere can be beyond Sedna. Sedna has an orbit that is very "eccentric" (highly elliptical). It's distance from the Sun varies greatly as it orbits. So, whether Sedna is inside or outside of the heliosphere changes with time.
The distance from the Sun to Sedna is approximately 86 astronomical units (AU). Since light travels at a speed of about 186,282 miles per second, it would take roughly 13.7 hours for light to travel from the Sun to Sedna. This is equivalent to around 822 minutes.
Mass of Sedna. = (π/6) * d^3 ρ. Mass of astronaut m = 700 /9.8 Kg. Force or weight on Sedan's surface = G (π/6) * d^3 ρ.*m / d ^2 = G (π/6) * d ρ.* m --------------------------------------… G = 6.673 x 10^ -11, d = 1.7e+6, ρ = *2100 --------------------------------------… F = 8.91 N.
It is believed that Sedna, a distant dwarf planet in our solar system, does not have a significant atmosphere due to its extreme distance from the sun. Therefore, it is unlikely to have any gases that make up an atmosphere similar to that of planets closer to the sun.
149.6 million km
150 million km :) :-