Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Distance Modulus Calculator
Compute distance to a celestial object in parsecs from its apparent and absolute magnitudes using the distance modulus formula d = 10^((m − M + 5)/5). The standard "standard candle" technique for measuring distances across the Milky Way and to nearby galaxies.
Fill in the required fields to see your result.
Astronomy
Orbital Velocity Calculator
Compute the orbital velocity around a central body using v = √(GM/r) × √(1+e), an approximation that scales the circular-orbit speed by the eccentricity. Useful for first-order estimates of satellite velocities, planetary orbital speeds, and binary star systems.
Fill in the required fields to see your result.
Key differences
| Distance Modulus Calculator | Orbital Velocity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 3 |
| Result | Distance (parsecs) | Orbital Velocity (m/s) |
| What it does | Compute distance to a celestial object in parsecs from its apparent and absolute magnitudes using the distance modulus formula d = 10^((m − M + 5)/5). The standard "standard candle" technique for measuring distances across the Milky Way and to nearby galaxies. | Compute the orbital velocity around a central body using v = √(GM/r) × √(1+e), an approximation that scales the circular-orbit speed by the eccentricity. Useful for first-order estimates of satellite velocities, planetary orbital speeds, and binary star systems. |