{ "version": 1, "id": "sky-test-reentry", "image": "https://ufoathome.org/demo-data/share/sky-test-reentry.jpg", "summaryTime": 52, "tags": [ "reentry", "space debris", "Zond 4", "historical" ], "description": { "en": "A test sky for a re-entry: Zond 4's launcher coming down over the eastern United States on 3 March 1968 at about 21:45 EST, seen from Owensboro, Kentucky, one of the places it was reported from. Not an observer's account: the re-entry as the sources establish it. Hundreds saw it; William Hartmann studied 78 reports for the Condon committee and found the pieces called a 'formation', a cigar with lit windows, or a craft passing low and silent. The path follows the orbit's inclination through the places it was seen from; its timing, height and the pieces' brightness are assumed, each with its reason in the file.", "fr": "Un ciel d'essai pour une rentrée atmosphérique : le lanceur de Zond 4 retombant sur l'est des États-Unis le 3 mars 1968 vers 21 h 45 heure de l'Est, vu d'Owensboro (Kentucky), l'un des lieux d'où il a été signalé. Ce n'est pas le compte rendu d'un observateur : c'est la rentrée telle que les sources l'établissent. Des centaines de personnes l'ont vue ; William Hartmann a étudié 78 signalements pour la commission Condon et y a trouvé une « formation », un cigare aux fenêtres éclairées, un appareil passant bas et en silence. La trajectoire suit l'inclinaison de l'orbite à travers les lieux d'observation ; son horaire, sa hauteur et l'éclat des morceaux sont supposés, chacun avec sa raison dans le fichier.", "es": "Un cielo de prueba para una reentrada: el lanzador de Zond 4 cayendo sobre el este de Estados Unidos el 3 de marzo de 1968 hacia las 21:45 hora del Este, visto desde Owensboro (Kentucky), uno de los lugares desde donde se informó. No es el relato de un observador: es la reentrada tal como la establecen las fuentes. Cientos de personas la vieron; William Hartmann estudió 78 informes para la comisión Condon y encontró una «formación», un cigarro con ventanas iluminadas, una nave que pasaba baja y en silencio. La trayectoria sigue la inclinación de la órbita a través de los lugares de observación; su horario, su altura y el brillo de los fragmentos se suponen, cada uno con su razón en el archivo.", "it": "Un cielo di prova per un rientro atmosferico: il lanciatore di Zond 4 che ricade sugli Stati Uniti orientali il 3 marzo 1968 verso le 21:45 ora dell'Est, visto da Owensboro (Kentucky), uno dei luoghi da cui fu segnalato. Non è il resoconto di un osservatore: è il rientro come lo stabiliscono le fonti. Centinaia di persone lo videro; William Hartmann studiò 78 segnalazioni per la commissione Condon e vi trovò una «formazione», un sigaro con finestre illuminate, un velivolo che passava basso e in silenzio. La traiettoria segue l'inclinazione dell'orbita attraverso i luoghi di osservazione; orario, altezza e luminosità dei pezzi sono supposti, ciascuno con la sua ragione nel file." }, "time": { "year": 1968, "month": 3, "day": 3, "hour": 21, "minute": 45, "second": 35 }, "utcOffsetHours": -5, "durationSeconds": 145, "place": [ { "lat": 37.7719, "lng": -87.1112, "name": "Owensboro, Kentucky" } ], "weatherTrack": { "keyframes": [ { "t": 0, "weather": { "cloudCover": { "value": 0, "basis": "assumed", "rationale": "Seen by hundreds from Alabama to Pennsylvania: no cloud is stated, a clear sky is assumed." }, "cloudDarkness": 0, "cloudBaseM": 2000, "lowerCloudCover": 0, "highCloudCover": 0, "precipitationType": "none", "precipitationIntensity": 0, "windDirectionDeg": 0, "windSpeed": 0, "storm": false } } ] }, "timeline": { "keyframes": [ { "t": 0, "shapes": [] } ], "order": [], "groups": [] }, "observerTrack": { "keyframes": [ { "t": 0, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 189.3, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 10000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 183.3, "pitchDeg": 10.5, "fovDeg": 80 } }, { "t": 20000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 174.0, "pitchDeg": 14.5, "fovDeg": 80 } }, { "t": 30000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 158.7, "pitchDeg": 19.4, "fovDeg": 80 } }, { "t": 40000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 134.6, "pitchDeg": 23.3, "fovDeg": 80 } }, { "t": 50000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 106.1, "pitchDeg": 22.3, "fovDeg": 80 } }, { "t": 60000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 84.1, "pitchDeg": 17.2, "fovDeg": 80 } }, { "t": 70000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 70.4, "pitchDeg": 12.2, "fovDeg": 80 } }, { "t": 80000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 62.1, "pitchDeg": 8.3, "fovDeg": 80 } }, { "t": 90000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 56.6, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 100000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 52.9, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 110000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 50.2, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 120000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 48.1, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 130000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 46.5, "pitchDeg": 8.0, "fovDeg": 80 } }, { "t": 140000, "pose": { "lat": 37.7719, "lng": -87.1112, "elevationM": 120, "headingDeg": 46.5, "pitchDeg": 8.0, "fovDeg": 80 } } ] }, "soundTrack": { "keyframes": [] }, "decor": [], "skyEvents": { "reentries": [ { "id": "zond-iv", "title": { "en": "Re-entry of a piece of Zond 4's launcher", "fr": "Rentrée d'une pièce du lanceur de Zond 4", "es": "Reentrada de una pieza del lanzador de Zond 4", "it": "Rientro di un pezzo del lanciatore di Zond 4" }, "object": { "name": "SL-12 R/B", "cosparId": "1968-013C", "norad": 3136 }, "track": [ { "t": 500, "lat": { "value": 34.8129, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -88.7311, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 85.0, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 10500, "lat": { "value": 35.2669, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -88.1251, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 83.8, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 20500, "lat": { "value": 35.7174, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -87.5119, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 82.6, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 30500, "lat": { "value": 36.1644, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -86.8912, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 81.4, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 40500, "lat": { "value": 36.6076, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -86.2629, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 80.1, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 50500, "lat": { "value": 37.0471, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -85.627, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 78.9, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 60500, "lat": { "value": 37.4826, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -84.9832, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 77.7, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 70500, "lat": { "value": 37.9142, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -84.3313, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 76.5, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 80500, "lat": { "value": 38.3416, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -83.6714, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 75.3, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 90500, "lat": { "value": 38.7648, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -83.0031, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 74.1, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 100500, "lat": { "value": 39.1837, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -82.3264, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 72.9, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 110500, "lat": { "value": 39.598, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -81.6412, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 71.6, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 120500, "lat": { "value": 40.0078, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -80.9472, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 70.4, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 130500, "lat": { "value": 40.4129, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -80.2444, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 69.2, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } }, { "t": 140500, "lat": { "value": 40.8132, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "lng": { "value": -79.5327, "basis": "derived", "rationale": "A circular orbit at the catalogue's inclination (51.54 deg), northbound, whose ground track passes nearest (least squares) to the 14 places Molczan, Visually Observed Natural Re-entries of Earth Satellites (2025) lists: 10 km from Nashville, 21 km from Lexington, 6 km from Bethany WV, 'a line from Kentucky to Pennsylvania' (Hartmann 1968, Condon report section VI chapter 2)." }, "altitudeKm": { "value": 68.0, "basis": "assumed", "rationale": "A decaying satellite or stage breaks up and its pieces burn at about 85 to 65 km: neither source gives a height, so it falls linearly from 85 km over Alabama to 68 km over Pennsylvania." } } ], "fragments": [ { "id": "a", "lagS": { "value": 0, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "absoluteMagnitude": { "value": -3, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "color": { "value": "#ffc070", "basis": "stated", "rationale": "Hartmann 1968, Condon report section VI chapter 2: golden-orange" }, "trainS": { "value": 2, "basis": "assumed", "rationale": "Hartmann 1968, Condon report section VI chapter 2: glittering tails" }, "untilT": { "value": 140500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." } }, { "id": "b", "lagS": { "value": 3, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "absoluteMagnitude": { "value": -2.2, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "color": "#ffb060", "trainS": 1.8, "untilT": { "value": 140500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." } }, { "id": "c", "lagS": { "value": 7, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "absoluteMagnitude": { "value": -1.5, "basis": "assumed", "rationale": "Hartmann: 'most observers saw 2 or 3 main pieces'. Their spacing and brightness are not given: a few seconds apart along the path, and a fireball's magnitudes, are assumed." }, "color": "#ffa050", "trainS": 1.5, "untilT": { "value": 132500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." } }, { "id": "d", "lagS": { "value": 1.2, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "fromT": { "value": 110500, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "untilT": { "value": 136500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." }, "absoluteMagnitude": { "value": -0.5, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "color": "#ff9a40", "trainS": 1 }, { "id": "e", "lagS": { "value": 2.0, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "fromT": { "value": 116500, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "untilT": { "value": 130500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." }, "absoluteMagnitude": { "value": 0, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "color": "#ff9a40", "trainS": 1 }, { "id": "f", "lagS": { "value": 5.0, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "fromT": { "value": 122500, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "untilT": { "value": 126500, "basis": "assumed", "rationale": "Burned out over south-western Pennsylvania at 02:48 UTC, Molczan's decay time; the smaller pieces a little before." }, "absoluteMagnitude": { "value": 0.3, "basis": "assumed", "rationale": "Hartmann: 'observers near the end of the trajectory saw more'. When and how many are not given: the leading piece is assumed to shed three more over West Virginia." }, "color": "#ff9a40", "trainS": 0.8 } ] } ] }, "frozen": { "relief": { "src": "sky-test-reentry.relief.zip", "takenOn": "2026-10-20", "attribution": "Relief © IGN, LiDAR HD and RGE ALTI (Licence Ouverte 2.0) in France; © AWS Open Data (SRTM, ETOPO1) elsewhere" }, "imagery": { "src": "sky-test-reentry.imagery.zip", "takenOn": "2026-10-20", "attribution": "Imagery © Esri, Maxar, Earthstar Geographics, and the GIS User Community" }, "map": { "src": "sky-test-reentry.map.zip", "takenOn": "2026-10-20", "attribution": "Imagery © Esri, Maxar, Earthstar Geographics, and the GIS User Community" } } }