Warp limit

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Star Fleet Engineering
Bureau of Starship and Starcraft Technology

Warp limit

The use of a conventional warp drive within a star system is exceptionally dangerous. A warp drive uses a gravitational field to bend normal space into a "subspace envelope" around a ship. This effect can easily be imbalanced and disrupted by the presence of a large gravitational field. To safely engage warp engines in the Sol system, for instance, a starship should be outside the orbit of Neptune.

Spectral class	Notes	Warp limit (light-minutes)
W		236
O		167
B		79
A		35
F		31
G	Sol	25
K		21
M		14
E	Brown Dwarf	6
J	Jupiter	0.8

Warp drive cannot be enaged safely near terrestrial planets inside the warp limit of the star, which is the location of most of these worlds. A world of comparable mass to Earth which is outside of the warp limit tend to have warp limits of approximately 0.4 light-minutes.

D-warp limit

While conventional warp drives are very dangerous to use inside systems because of high particle densities, it can be fatal to use hyperspace drive inside a system. Stars and other massive objects create gravitational singularities in hyperspace. It is fatal to attempt to enter or leave hyperspace inside these singularities.

Spectral class	Notes	Hyperspace limit (light-minutes)
W		2370
O		1930
B		910
A		407
F		3582
G	Sol	288
K		241
M		158
E	Brown Dwarf	70
J	Jupiter	9.1

Smaller planetary bodies do have d-warp limits, but are virtually always with in the warp limit of the star itself. A planet of comparable mass to earth which is outside the hyperperspace limit of its star would have a hyperspace limit of approximately 0.5 light-minutes.