{
 "id": "dart-smart-nav",
 "entry": null,
 "name": "DART's autonomous targeting",
 "group": "ran",
 "class": "classical",
 "location": "deep space",
 "operator": "Johns Hopkins Applied Physics Laboratory, for NASA",
 "developer": "Johns Hopkins Applied Physics Laboratory",
 "host": "DART",
 "catalogue": {
  "number": 49497,
  "name": "NASA DART",
  "launched": "2021-11-24",
  "decayed": "2022-09-26",
  "match": "by name, the reviewer's judgement"
 },
 "dates": {
  "launched": "2021-11-24",
  "ran": "26 September 2022",
  "reported": "2023-09-26",
  "ended": "2022-09-26"
 },
 "hardware": "not stated in what was read",
 "software": "An autonomous targeting system, known as SMART Nav",
 "did": "Aimed the spacecraft at a small asteroid by itself, and hit it.",
 "marks": [
  {
   "stage": "L",
   "evidence": 3,
   "basis": [
    "c3"
   ]
  },
  {
   "stage": "R",
   "evidence": 1,
   "basis": [
    "c1",
    "c2"
   ]
  }
 ],
 "claims": [
  {
   "id": "c1",
   "kind": "quote",
   "text": "DART (Double Asteroid Redirection Test) used an autonomous targeting system to aim itself at Dimorphos.",
   "speaker": "Johns Hopkins Applied Physics Laboratory",
   "relation": "developer",
   "source": "apl-dart",
   "url": "https://www.jhuapl.edu/destinations/missions/dart",
   "source_title": "DART",
   "publisher": "Johns Hopkins Applied Physics Laboratory",
   "source_kind": "project-page",
   "published": "2023-09-26",
   "published_basis": "page metadata",
   "accessed": "2026-10-04",
   "copy_route": "direct",
   "read": "in part: three sentences of 5,300 characters"
  },
  {
   "id": "c2",
   "kind": "quote",
   "text": "DART impacted Dimorphos on Sept. 26, 2022, striking the smaller body at just over four miles per second",
   "speaker": "Johns Hopkins Applied Physics Laboratory",
   "relation": "developer",
   "source": "apl-dart",
   "url": "https://www.jhuapl.edu/destinations/missions/dart",
   "source_title": "DART",
   "publisher": "Johns Hopkins Applied Physics Laboratory",
   "source_kind": "project-page",
   "published": "2023-09-26",
   "published_basis": "page metadata",
   "accessed": "2026-10-04",
   "copy_route": "direct",
   "read": "in part: three sentences of 5,300 characters"
  },
  {
   "id": "c3",
   "kind": "data",
   "fields": {
    "OBJECT_NAME": "NASA DART",
    "LAUNCH_DATE": "2021-11-24",
    "DECAY_DATE": "2022-09-26"
   },
   "speaker": "CelesTrak satellite catalogue",
   "relation": "catalogue",
   "source": "celestrak-49497",
   "url": "https://celestrak.org/satcat/records.php?CATNR=49497&FORMAT=json",
   "source_title": "Satellite catalogue record 49497 (NASA DART)",
   "publisher": "CelesTrak",
   "source_kind": "catalogue",
   "published": "undated",
   "published_basis": "a live catalogue record; dated by when it was read",
   "accessed": "2026-10-04",
   "copy_route": "json",
   "read": "in full"
  }
 ],
 "conflicts": [],
 "notes": "Classed as classical autonomy: navigation from images by fixed algorithms, with no learned model named in what was read. The catalogue's decay date is the day of the impact.",
 "changed": "Added on 4 October 2026, in the second round of reading.",
 "headline": "L3 R1"
}