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Stellar Mass Calculator

Calculate orbital velocity, Kepler's laws, Tsiolkovsky rocket equation, Delta-V budgets, Hohmann transfer orbits, and escape speed for stellar mass.

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Input Astrophysical Parameters

Enter central body mass, orbital altitude, or specific impulse.

Calculated Orbital Velocity / Delta-V

7.67 km/s
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Tsiolkovsky Rocket Equation

Delta-V velocity increment ฮ”v = I_sp ร— gโ‚€ ร— ln(m_initial / m_final). Low Earth Orbit (LEO) insertion requires ~9.3โ€“10.0 km/s Delta-V.

Calculation Methodology & Details

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Formula

Circular Orbital Speed: v = โˆš(G ร— M / r) Escape Velocity: v_esc = โˆš(2 ร— G ร— M / R) Kepler's 3rd Law: Tยฒ = (4ฯ€ยฒ / [G ร— M]) ร— aยณ Drake Equation (Civilizations): N = R* ร— f_p ร— n_e ร— f_l ร— f_i ร— f_c ร— L

Applies orbital celestial mechanics, Keplerian ellipse trajectories, relativistic Doppler shifts, and rocket propulsion thermodynamics.

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Important Disclaimer

Calculations assume two-body Keplerian gravity without N-body planetary perturbations or atmospheric drag unless drag loss is added to ฮ”v budgets.

How to Calculate Step-by-Step

Follow these steps to complete the calculation:

1

Step 1

Select celestial body (Earth, Moon, Mars, Sun) or enter custom mass M.

2

Step 2

Specify orbital radius r (km) or rocket propellant mass ratio (m0 / mf).

3

Step 3

View orbital velocity in km/s, orbital period (minutes/hours), escape velocity, or Hohmann transfer impulse Requirements.

Detailed Insights & Expert Guide

โ„น๏ธ About this Calculation

The Stellar Mass Calculator solves satellite orbital mechanics, Tsiolkovsky rocket Delta-V, Hohmann interplanetary transfer orbits, Kepler's 3rd law, and Drake equation alien civilization estimates.

Variable Glossary

Input

Delta-V (ฮ”v)

Measure of impulse required to perform orbital maneuvers measured in m/s or km/s.

Parameter

Specific Impulse (I_sp)

Rocket engine fuel efficiency measuring thrust produced per unit weight of propellant burned per second (seconds).

FAQ

What is Earth's escape velocity?
From Earth's surface, escape velocity v_esc = โˆš(2GM / R) โ‰ˆ 11.186 km/s (~25,020 mph or Mach 33). This is the minimum speed needed to break free from Earth's gravity without further propulsion.
What is a Hohmann Transfer Orbit?
A Hohmann transfer orbit is an elliptical orbit used to transfer a spacecraft between two circular orbits of different radii in the same plane using two engine burns for maximum fuel efficiency.
What is the Drake Equation for alien civilizations?
The Drake Equation N = R* ร— f_p ร— n_e ร— f_l ร— f_i ร— f_c ร— L estimates the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy based on star formation and planetary habitability factors.