# Orbit of a satellite Calculator

## Calculates the orbital radius and period, and flight velocity from the orbital altitude.

 Orbital altitude h km  from Earth's surface 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit Orbital radius r km Flight velocity v km/s Orbital period P (hh:mm:ss)
 $\normal flight\ velocity:\ v=\sqrt{\large\frac{398600.5}{6378.14+h}}\hspace{10} {\small(km/s)}\\orbital\ period:\ P=2\pi{\large\frac{6378.14+h}{v}}\hspace{10} {\small(sec)}\\$
Orbit of a satellite
 [1-10] /70 Disp-Num5103050100200
[1]  2019/01/12 01:37   Male / 30 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
Query on orbital velocities for LEO Iridium satellite constellation.

h = ~629km, v= ~27100km/h (7.54km/s)
Comment/Request
Query on orbital velocities for LEO Iridium satellite constellation.

h = ~629km, v= ~27100km/h (7.54km/s)
[2]  2019/01/10 07:38   Male / 50 years old level / A teacher / A researcher / Very /
Purpose of use
Helping my son with Physics homework.
Comment/Request
Exactly what was needed.
[3]  2019/01/08 02:55   Male / 60 years old level or over / A retired person / A little /
Purpose of use
[4]  2018/12/20 01:23   Male / 30 years old level / An engineer / A little /
Purpose of use
Just for some calculus thanks.
Comment/Request
There is no need to assume cirucular orbit if you use semi mayor axis as input instead of altitude. In any case, all the outputs can be inputs (altitude only if circularOrbit), so maybe by setting one the tool gives you the others, just an idea.
[5]  2018/11/29 14:40   Male / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
Physics Homework-Finding the velocity of the Lunar Command Module as it orbits the moon.
Comment/Request
Calculator is only for satellites that orbit earth, not any other body.
[6]  2018/11/25 12:07   Male / 30 years old level / An engineer / A little /
Purpose of use
Calculating position for a space station in a role-playing game. need to derive a ground track from this
[7]  2018/11/13 05:53   Male / 20 years old level / High-school/ University/ Grad student / Very /
Purpose of use
Researching the GOSAT program of JAXA for a university assignment
[8]  2018/10/22 20:42   Male / 20 years old level / An engineer / Very /
Purpose of use
Another person quickly determining the orbital period of the proposed Chinese satellite. 300ish miles sounded ridiculously low and this confirms it. Silly news is silly.
[9]  2018/10/22 11:09   Male / 60 years old level or over / A retired person / Very /
Purpose of use
Finding the orbital period of the proposed Chinese artificial moon. If reported altitude of 310 miles is correct I don't see how this moon is going to stay put long enough to do any good.
[10]  2018/10/22 02:36   - / 50 years old level / Self-employed people / Very /
Purpose of use
Researching about how feasible is a "Chinese artificial moon" to provide dusk/twilight illumination for a fixed spot of 50km radius for city of Chengdu.

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