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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7UGOH476LSACNJHPRU4SIT6BBUWMNTY3/?format=api",
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    "message_id": "[email protected]",
    "message_id_hash": "7UGOH476LSACNJHPRU4SIT6BBUWMNTY3",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7UGOH476LSACNJHPRU4SIT6BBUWMNTY3/?format=api",
    "sender": {
        "address": "akihiro.kubota (a) nifty.com",
        "mailman_id": "c1e695eb81dc4794a825204874886c06",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/c1e695eb81dc4794a825204874886c06/emails/?format=api"
    },
    "sender_name": "Akihiro Kubota",
    "subject": "[amsat-bb] Notice for Operation Conclusion of DESPATCH",
    "date": "2015-01-03T08:10:01Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EGSMKJNKSPORYUSRQJQUY4A75EZEH44P/?format=api",
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2YYKY3R4WKPZDYMJ2NMSXIZKPBZ5F2X5/?format=api"
    ],
    "votes": {
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    "content": "Dear All,\n\nHappy New Year 2015!\n\nOne month has past since Deep Space Sculpture \"ARTSAT2:DESPATCH(FO-81)\" was put into an Earth-escape orbit as a piggyback payload of H-IIA F26 launched at December 3, 2014 from Tanegashima Space Center, JAXA. It is estimated to have stopped sending radio waves since the battery of DESPATCH already ran out (We predicted that the battery will work for 27 days according to the running time of the transmitter).\n\nToday January 3, the main control station, Tama Art University Ground Station, decided to conclude the operation of DESPATCH. Many people supported and cooperated us throughout the design and development of DESPATCH. In addition, many excellent many ham radio operator received and reported super weak  radio waves of DESPATCH from deep space. To have this opportunity, I would like once again to thank all of them very much.\n\nReception reports of DESPATCH are summarized on the following page.\n\nReception Reports\nhttps://docs.google.com/spreadsheets/d/1WP-FzXHe8axAzNy44SGbKpJqIRKWHAcIP9vXnaHMb6g/edit#gid=0\n\nFinally, we had two reception reports at 4.7 million kilo-meters from the Earth  (more than 12 times of the distance to the Moon). They were far beyond what we expected. They are the the longest communication distance in the world between two amateur radio stations.\n\nOrbital elements of DESPATCH is as follows (J2000 heliocentric ecliptic coordinates).\n\n- Semi-major axis a : 1.003881127 [AU]\n- Eccentricity e : 0.08741828512\n- Inclination  i : 6.796995362 [deg]\n- Argument of perihelion w : 96.90057903 [deg]\n- Longitude of the ascending node W : 250.5520871 [deg]\n- Mean anomaly at epoch  M : 101.6280436 [deg]\n- Epoch  : 2457023.50000 [JD]\n(Time of perihelion :  2456919.7870655278675 [JD]) \n\ncf. Orbital elements of EARTH : http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html\n\nCelestial sphere position and orbital trajectory of DESPATCH can be checked anytime on the following web pages.\n\n- Celestial Sphere\nhttp://artsat.jp/project/despatch/celestial\n\n- Orbital Position\nhttp://artsat.jp/project/despatch/orbit\n\nTransmission of the radio wave from DESPATCH has ended. However, the life of DESPATCH as a sculpture around the sun is almost eternal.\nWe calculated the orbit (the distance from the Earth) of DESPATCH for 500 years from now. \n\nhttp://artsat.jp/wp-content/uploads/2015/01/500years.png\n\nhttp://artsat.jp/wp-content/uploads/2015/01/500years_large.png\n\nDESPATCH will continue to orbit around the sun as an artificial asteroid. By examining the calculated results for the local minimum value of the distance between the Earth, DESPATCH will approaches to less than 1 million km from Earth after about 350 years. Possibly it will approach more closer to the Earth due to the interaction with unpredictable other celestial bodies.\n\nWe are glad if you think of DESPATCH as the most distant artwork in the world sometimes in the future.\n\nARTSAT project will continue to the future. We already started the conceptual design of next ARTSAT3. We kindly ask for your continuous support and cooperation for the project.\n\nJanuary 3, 2014\nARTSAT Project\n\n",
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}