Circular Velocity Calculator |
Computes the circular orbital velocity of an object. |

Velocity Calculator |
Computes the orbital velocity of an object. |

Escape Velocity Calculator |
Computes the escape velocity of an object. |

Period Calculator |
Computes the orbital period of an object. |

Semi-Major Axis Calculator |
Computes the semi-major of an object from its period. |

Visual Magnitude Calculator |
Computes the visual magnitude of a star from its absolute magnitude and distance. |

Hill Sphere Calculator |
Computes the Hill Sphere of an object |

Sail Calculator |
Computes the maximum velocity possible from acceleration caused by light pressure |

Interior Reach Formula | Computes the distance interior to a planet where the planet's gravity will make the region unstable for other planets. See this paper by Barrie W. Jones, et.al. for an explanation and use their table to obtain a value for n. |

Exterior Reach Formula | Computes the distance Exterior to a planet where the planet's gravity will make the region unstable for other planets. |

Stellar Encounter Calculator |
Computes the number of stars expected to pass within a given distance of the Sun over a specified period of time. |

Kozai eccentricity calculator | Computes the maximum eccentricity obtained by a planet due to the Kozai mechanism. |

Kozai period calculator | Computes the period of time for the Kozai mechanism to cause a planet's orbit to go from maximum to minimum eccentricity and back to maximum eccentricity. |

Poynting-Robertson calculator | Computes force on an object due to the Poynting-Robertson effect, in which sunlight causes objects to spiral in towards the sun. |

Effective Radius Calculator | Computes the effective radius of an object due to its gravity given the velocity at infinity of an approaching object. |

Lagrange Point Finder | Computes the distance to the the 5 Lagrange points, and the velocity of the point. |

Orbital Elements Cartesian Coordinates converter | Converts between orbital elements and Cartesian coordinates and state vectors |

Cramer's Rule | Solve a 3 x 3 matrix using Cramer's Rule |

Equatorial to Ecliptic | Converts from equatorial to ecliptic coordinates |