{
  "id": "x-37b",
  "name": "X-37B Orbital Test Vehicle",
  "aliases": [
    "OTV"
  ],
  "domain": "space",
  "country": "USA",
  "category": "Reusable uncrewed spaceplane",
  "status": "in-service",
  "fielded": null,
  "operators": [
    "USA"
  ],
  "summary": "Uncrewed reusable spaceplane for long-duration experiments; launches on Atlas V or Falcon rockets and lands on a runway.",
  "specs": [
    {
      "k": "orbit_regime",
      "v": "LEO",
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium"
    },
    {
      "k": "altitude_km",
      "v": [
        177,
        805
      ],
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium",
      "note": "110–500 miles"
    },
    {
      "k": "first_launch",
      "v": 2010,
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium"
    },
    {
      "k": "sats_count",
      "v": 2,
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium",
      "note": "Two vehicles"
    },
    {
      "k": "mass_kg",
      "v": 4990,
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium",
      "note": "11,000 lb at launch"
    },
    {
      "k": "length_m",
      "v": 8.9,
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium",
      "note": "29.25 ft"
    },
    {
      "k": "mission",
      "v": "OTV-6 spent 908 days in orbit (2020–2022); OTV-7 landed at Vandenberg 7 March 2025; OTV-8 was scheduled to launch 21 August 2025 with laser communications and a quantum inertial sensor experiment",
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium"
    },
    {
      "k": "contractor",
      "v": "Boeing",
      "src": [
        "asf-x-37b"
      ],
      "conf": "medium"
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "satellite",
  "image": {
    "file": "x-37b.jpg",
    "thumb": "x-37b-thumb.jpg",
    "credit": "Courtesy photo, U.S. Space Force / DVIDS",
    "license": "Public domain",
    "url": "https://www.dvidshub.net/image/8902878",
    "title": "X-37B Orbital Test Vehicle Concludes Seventh Successful Mission",
    "source": "DVIDS",
    "dvids_id": 8902878,
    "unit": "Secretary of the Air Force Public Affairs"
  },
  "verified": null,
  "changelog": [
    {
      "date": "2026-11-08",
      "change": "Entry created from cited open sources"
    }
  ],
  "url": "https://www.defensepedia.com/systems/x-37b.html",
  "sources": {
    "asf-x-37b": {
      "title": "X-37B Orbital Test Vehicle (weapons and platforms entry)",
      "publisher": "Air & Space Forces Magazine",
      "url": "https://www.airandspaceforces.com/weapons/x-37b/",
      "published": null,
      "tier": 3,
      "checked": "2026-11-08"
    }
  }
}