Re: Lunar Geosynch orbit question !

From: Antonín Vítek (
Date: Thu Jun 28 2001 - 05:44:52 PDT

  • Next message: Rick Baldridge: "Re: Lunar Geosynch orbit question !"

    Rick Baldridge wrote:
    > Not quite.  L2 Lagrange point is on a LINE with the Sun and the Earth,
    > further out than the Earth, with the Moon's orbit well inside.  L2 does NOT
    > follow the Moon, therefore, it does NOT stay in-sync with the "far side" of
    > the Moon.
    I disagree.  Lagrangian points L1 thru L5 are present in EACH two-body system,
    eg. Sun-Earth (this is descrived in cited e-mail), but also in e.g. Sun-Jupiter
    system (there are in the vicinity of point L3 and L4 asteroids called Troians).
    Stability of orbits of object inserted in Lagrangian points depends mainly on
    disturbing gravitational forces of other celestial bodies. As the influence of
    the Sun on the Earth-Moon system is rather strong, the use of Langrangien point
    in Earth-Moon system might be questionable (thi is only a guess, proof might be
    done only using rather complicated numerical integration of orbits in question).
    Excuse an OT e-mail
    Antonin Vitek
    Main Library - Academy of Sciences of the Czech Republic
    Narodni 3, CZ-115 22 Praha 1, Czech Republic
    Phone: +420(2)21 40 32 55
    **** Note change in phone no. ****
    Fax:   +420(2)24 24 05 26         E-mail:AVITEK@LIB.CAS.CZ
    My satellite home page:
    Kytin 127, CZ-525 10 p. Mnisek p.B., Czech Republic
    Phone: +420(305)592865
    Coordinates: 14.2193 deg E, 49.8488 deg N, 442 m ASL
    Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
    in the SUBJECT to

    This archive was generated by hypermail 2b29 : Thu Jun 28 2001 - 05:48:07 PDT