I have, for the 07:09:11 UTC, 02 Dec Mars Pathfinder launch, the following based on data kindly furnished by David Spencer (JPL): MPF SECO1 173x191km 1 99990U 96337.30462375 .00104827 44878-7 13776-4 0 16 2 99990 28.7342 358.2649 0014020 286.1777 196.8780 16.34021829 12 MPF SECO2 177x3083km 1 99990U 96337.34524446 .00003667 00000-0 81324-5 0 15 2 99990 28.7459 357.9430 1814250 3.2611 359.7846 12.11493997 28 Shadow entry is at 08:15:47 UTC, exit at 08:45:37 UTC. See http://mpfwww.jpl.nasa.gov for more background and look at http://mpfwww.jpl.nasa.gov/mpf/launch_profile.html for a summary of the launch profile. David's state vectors are as follows (in case Bjorn wants to try out his new toy): |>Main Engine Cutoff 7:13:31.784 UTC |> |> Position & Velocity Elements |> Earth centered, Earth equator and equinox of J2000 |> X Distance -1463.51121000000 km |> Y Distance 5556.37047000000 km |> Z Distance 3017.59905000000 km |> X Velocity -6.16701700000000 km/sec |> Y Velocity -.678483999999999 km/sec |> Z Velocity -.463290000000000 km/sec |> |> Classical Orbital Elements |> Earth centered, Earth equator and equinox of J2000 |> Semi-major Axis 4738.08826369957 km |> Eccentricity 0.380270927270424 |> Inclination 28.6886964977004 degree |> Node Angle -1.56457690274954 degree |> Arg of Periapsis -66.5257284426162 degree |> Mean Anomaly 161.415248363027 degree |> |> |>Second Engine Cutoff-1 (SECO-1) 7:18:39.492 UTC |> |> Earth centered, Earth equator and equinox of J2000 |> X Distance -3435.09561000000 km |> Y Distance 4928.88419000000 km |> Z Distance 2642.65193000000 km |> X Velocity -6.63945700000000 km/sec |> Y Velocity -3.53021200000000 km/sec |> Z Velocity -2.04611500000000 km/sec |> |> Classical Orbital Elements |> Earth centered, Earth equator and equinox of J2000 |> Semi-major Axis 6563.33634216284 km |> Eccentricity 0.143960292246540E-02 |> Inclination 28.7298637945968 degree |> Node Angle -1.76194313960540 degree |> Arg of Periapsis -115.334698592281 degree |> Mean Anomaly -121.557282632713 degree |> |> |>Second Engine Cutoff-2 (SECO-2) 8:17:09.121 UTC |> |> Position & Velocity Elements |> Earth centered, Earth equator and equinox of J2000 |> X Distance 6551.47265000000 km |> Y Distance 59.1673399999999 km |> Z Distance 160.834760000000 km |> X Velocity -.178974000000000 km/sec |> Y Velocity 7.43424500000001 km/sec |> Z Velocity 4.07454800000000 km/sec |> |> Classical Orbital Elements |> Earth centered, Earth equator and equinox of J2000 |> Semi-major Axis 8013.82047225981 km |> Eccentricity 0.182203735140544 |> Inclination 28.7623779038017 degree |> Node Angle -2.04585668297056 degree |> Arg of Periapsis 3.44090646257341 degree |> Mean Anomaly -.351954105404022 degree |> |> |>Injection (TECO) 8:20:07.211 UTC |> |> Position & Velocity Elements |> Earth centered, Earth equator and equinox of J2000 |> X Distance 6357.25309000000 km |> Y Distance 1462.16719000000 km |> Z Distance 926.754370000000 km |> X Velocity -2.27206100000000 km/sec |> Y Velocity 9.84686400000000 km/sec |> Z Velocity 5.36052900000000 km/sec |> |> Classical Orbital Elements |> Earth centered, Earth equator and equinox of J2000 |> Semi-major Axis -40410.5060808825 km |> Eccentricity 1.16239852847423 |> Inclination 28.7775241325488 degree |> Node Angle -2.03805966992218 degree |> Arg of Periapsis 10.0240860383475 degree |> Mean Anomaly 0.310766652935716 degree regards, -- Neil Clifford <n.clifford@physics.oxford.ac.uk> http://www.physics.ox.ac.uk/sat/satintro.html