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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RATJ3BYEWC5TUJSRDD7UFTQVQHCFAFRK/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CA+9cpqV1L6tQw6UvP3ZAPgnNUaaJLPJU4UJeEq=MWhNgRzg+Kg@mail.gmail.com",
    "message_id_hash": "RATJ3BYEWC5TUJSRDD7UFTQVQHCFAFRK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RATJ3BYEWC5TUJSRDD7UFTQVQHCFAFRK/",
    "sender": {
        "address": "mdavidoff42 (a) gmail.com",
        "mailman_id": "bb97e62cb6954c6caf55ec25859b05d7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/bb97e62cb6954c6caf55ec25859b05d7/emails/"
    },
    "sender_name": "Martin Davidoff",
    "subject": "[amsat-bb] Victor Kudielka and AO-13",
    "date": "2018-02-28T15:25:32Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "     The recent mention of the work by Kozai and Lidov and it's relation to\nAO-13 stimulated a number of long dormant memories.  I've always been in\nawe of Dr. Victor Kudielka, OE1VKW who, using 80286 (?) technology, was\nable to apply their work to predict the demise of AO-13.\n\n      Prior to launch I don't think any of us had considered the\npossibility that asymmetries in the shape of the earth could cause\nfluctuations in the eccentricity of AO-13's final orbit that would, without\naffecting the spacecraft's total energy, lower the perigee to the point\nwhere re-entry would occur.\n\n      Which leads me to wonder about Victor's status these days.  I can't\nfind any reference to him post 2013.  Any info would be appreciated.\n\n73, Martin, k2ubc\n\n\nOn Wed, Feb 28, 2018 at 8:00 AM, Robert McGwier <[email protected]> wrote:\n\n> Yes, AO 13.\n>\n> On Tue, Feb 27, 2018 at 1:09 PM Gregory Beat <[email protected]> wrote:\n>\n> > Jeopardy question?\n> >\n> > Oscar 13, AO-13\n> >\n> > greg, w9gb\n> >\n> > ===\n> > Subject: [amsat-bb] Yoshihide Kozai\n> >\n> > The long scientific life of Kozai ended recently with his death at ~90\n> > years old\n> >\n> > Kozai and Lidov proposed a mechanism for why the Luna 3 probe decayed\n> into\n> > the Earth's atmosphere when everyone believed it would last \"forever\".\n> >\n> > This same mechanism describes the death of which amateur spacecraft?\n> >\n> > Bob\n> > N4HY\n> >\n> > Sent from iPad Air\n> >\n> --\n> Bob McGwier\n> Founder, Federated Wireless, Inc\n> Founder and Technical Advisor, HawkEye 360, Inc\n> Research Professor Virginia Tech\n> Chief Scientist:  The Ted and Karyn Hume Center for National Security and\n> Technology\n> Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY\n> Faculty Advisor Virginia Tech Amateur Radio Assn, Trustee K4KDJ\n> Member of PVRC (Roanoke-Blacksburg), TAPR,  life member of ARRL and AMSAT,\n> NRVR.ORG (Rocketry)\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n",
    "attachments": []
}