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CLASSIFIED

HBTSS-SV1

US Hypersonic Missile Tracking Satellite (Golden Dome Cornerstone) · L3Harris / Missile Defense Agency

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HBTSS-SV1, the companion satellite to HBTSS-SV2 in the Missile Defense Agency's Hypersonic and Ballistic Tracking Space Sensor program, part of the same February 2024 launch that put two rival prototype missile-tracking satellites into orbit for a head-to-head test. The winning design has since collected over 650,000 images of test events and real-world targets, and the Missile Defense Agency has already begun designing a follow-on 'Discriminating Space Sensor' specifically to tell a real incoming warhead apart from decoys and countermeasures.

Its orbit

Orbit
Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
Altitude
347–355 mi (558–572 km)
Inclination
40.0°
One orbit
95.8 minutes15.0 orbits a day
NORAD ID
58960
Int’l designator
2024-028F
Launched
2024

Orbital elements from CelesTrak, as of 22 Sep 2026.

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