KSP stock system

Orbit wiki, relay and mission toolkit

Choose any KSP body, check its core data and SOI, then plan orbits, transfers, delta-v, plane changes and relay deployments.

Kerbal tip More delta-v fixes many mistakes. Not all, but many.

Mini-wiki

Celestial body

Kerbin

Open KSP Wiki page

Orbita

Apsydy AMSL

Drag the Pe or Ap point on the visualization to change altitude.

Mission Control note: If Pe touches atmosphere, it is either aerobraking or optimism. Check twice before time-warping.

Preview

Orbit shape

Elliptic

Maneuver

Transfer Hohmanna

Optional

Plane change

Mission planning

Delta-v planner: computed vs map

Pilot reality check

Add your real piloting cost, because Kerbal piloting is usually far from ideal.

Snacks margin: For course corrections, rescue burns and those 'I meant to do that' moments. The quiet difference between a mission and a rescue mission.

Computed values are patched-conic estimates for transfer, capture, return and ideal airless landing/ascent. Map values are editable community-style references and usually include piloting losses, margins and practical route assumptions.

Relay satellites

Orbital period and deployment orbits

Mission plan:
  1. Phasing orbitFly the deployment craft onto a 2/3 or 4/3 phasing orbit.
  2. Release at Pe/ApDrop one satellite at the shared apsis and circularize it on the target relay orbit.
  3. One orbit, repeatWait one full phasing orbit. The previous satellite shifts by about 1/3, so release the next one. Repeat for satellite three.
  4. Good enough coverageThree satellites are useful, not magic: planets block line of sight and antennas have limits. Good enough is still very Kerbal engineering.

Relay satellite builder

Antenna power combines sublinearly, so two small antennas do not give 2x range.

Two small antennas help. They do not magically become one giant antenna. Sadly.

Relay 3-sat minimum: For three satellites spaced 120 degrees apart, the minimum orbital radius is 2R, so the minimum AMSL altitude is R. The maximum depends on antenna power, satellite-to-satellite distance and whether the network has Kerbin/DSN range. Base data comes mainly from KSP Wiki, in-game/CommNet formulas, community delta-v maps and player discussions.
Disclaimer: This is an unofficial fan-made tool. It is not affiliated with, endorsed by, or sponsored by the owners or publishers of Kerbal Space Program. Kerbal Space Program names and trademarks belong to their respective owners. Values are estimates based on in-game formulas, KSP Wiki data and community delta-v references, not official game documentation; Kerbals may still turn the plan into fireworks. This page is part of the Game Guide Dog website. If a mission fails anyway, check staging first.