# Re: "The Terminator" Fortran routine

*From*: "BTU Bill" <whclarkii@xxxxxxxxxxx>*Date*: 23 Jun 2005 07:43:08 -0700

>

> Subroutine energye, which contains this statement, is dead code,

> probably a relic.

Yes, this again is used in the main program. It calculates what we

call the Jacobi Integral, which in the restricted Three Body Problem is

a constant value for the whole trajectory from Earth to Mars - the

heliocentric part, when not near Earth or Mars. This is how we can

confirm that the trajectory is accurate; which mine was. It's a very

convenient way to authenticate trajectory calculations like this one.

.

**References**:**"The Terminator" Fortran routine***From:*BTU Bill

**Re: "The Terminator" Fortran routine***From:*Michael Metcalf

**Re: "The Terminator" Fortran routine***From:*e p chandler

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