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# Orbitology

Orbitology generally concerns the study of planetary motion around the sun's orbit.

vCalc's Orbitology folder contains equations used in orbitology.

### Parent Categories:

## Orbitology Equations

- Argument of Perigee, `omega`
- Circular Orbit Velocity using `mu`
- Circular Orbit Velocity using r only
- Circular Orbit Velocity using R_E
- Earth escape velocity using `mu`
- Earth escape velocity using `R_E`
- Earth escape velocity using r only
- Radial Acceleration (R,T)
- Radius Of Apogee
- Radius Of Perigee
- Semi-Major Axis using `mu & P`
- Semi-Major Axis using `mu`
- Semi-Major Axis using `r_a`
- Semi-Major Axis using just P
- Sun Perturbation - argument of perigee
- Sun Perturbation - RAAN
- Velocity of an Object in Orbit
- Declination of Sun
- Eccentricty `||vece||`
- Eccentricty using `r_a`
- Eccentricty using `r_p`
- Eccentricty using energy
- Eccentricty Vector `vece`
- ECEF Azimuth from Celestial xy coordinates
- ECEF X-coordinate from Celestial Az/El
- ECEF Y-coordinate from Celestial Az/El
- ECEF Z-coordinate from Celestial Az/El
- ECEF_Elevation from Celestial z coordinate
- Force of Gravity on Satellite
- Inclination, `i`
- Maintenance Change in Velocity for Geosynchronous Satellite
- Mean Motion (revs/day)
- Moon Perturbation - Argument of Perigee
- Moon Perturbation - RAAN
- Net Force in Uniform Circular Motion
- Nodel Vector (`vecn`)
- Non-Sperical Earth Perturbation - Argument of Perigee
- Non-Sperical Earth Perturbation - Argument of Perigee (combined
- Non-spherical Earth Perturbation - RAAN
- Non-spherical Earth Perturbation - RAAN (combined coefficients)
- Orbit Period - Direct Orbit
- Orbit Period - Retrograde Orbit
- Orbit Period [a, `mu`]
- Orbit Period [a, `R_E`]
- Orbit Period [a]
- Orbit Period of Circular Orbit
- Polar Equation of a Conic Section
- Right Ascension of the Ascending Node, `Omega`
- Specific Mechanical Energy (1)
- Specific Mechanical Energy (2)
- TLE Checksum
- Total Mechanical Energy in a Circular Orbit
- True Anomaly, `nu`[`vecn,vecr`]
- True Anomaly, `nu`[E]
- Velocity of a Satellite