Calculate Hill sphere radius and rough prograde/retrograde satellite stability limits.
Hill radius
1,471,546 km
at periapsis
Prograde limit
735,773 km
rough 0.5 RH rule
Retrograde limit
1,030,082 km
rough 0.7 RH rule
At periapsis, the Hill sphere gives the local region where satellites can stay bound to the smaller body.
RH 1,471,546 km
Hill radius
1,471,546 km
computed at orbital periapsis
Prograde limit
735,773 km
rough 0.5 RH satellite limit
Retrograde limit
1,030,082 km
rough 0.7 RH satellite limit
Periapsis context
147,099,586 km
mass ratio 3.0034e-6, eccentricity 0.0167
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.
Calculate Hill sphere radius and rough prograde/retrograde satellite stability limits.
Hill radius
1,471,546 km
at periapsis
Prograde limit
735,773 km
rough 0.5 RH rule
Retrograde limit
1,030,082 km
rough 0.7 RH rule
At periapsis, the Hill sphere gives the local region where satellites can stay bound to the smaller body.
RH 1,471,546 km
Hill radius
1,471,546 km
computed at orbital periapsis
Prograde limit
735,773 km
rough 0.5 RH satellite limit
Retrograde limit
1,030,082 km
rough 0.7 RH satellite limit
Periapsis context
147,099,586 km
mass ratio 3.0034e-6, eccentricity 0.0167
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.