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USA 55
Former American military experimental communications satellite. USA 55 was launched on April 5, 1990 aboard a Pegasus from Edwards AFB. Latest status in GCAT: in orbit.
COSPAR 1990-028BNORAD 20547United States
Identity
- Name in GCAT
- USA 55
- Payload designation
- SECS
- Other names
- :U,CHALK TERCEL 1?
- International designator
- 1990-028B
- NORAD catalog number
- 20547
- GCAT identifier
- S20547
- UN registration
- ST/SG/SER.E/250
Mission
- Mission type
- Communications
- Use
- Defense
- Program
- DARPA Light
- Owner
- DARPA
- Country
- United States
- Builder
- Defense Systems Inc
- Platform (bus)
- GLOMR
Launch
- Date
- April 5, 1990 · 19:10 UTC
- Launch record
- 1990-028Success
- Rocket
- Pegasus
- Spaceport
- Edwards AFB · pad RW04/22
Orbit and fate
- Orbit class (GCAT)
- LLEO/P
- Perigee
- 489 km
- Apogee
- 670 km
- Inclination
- 94.14°
- Status
- In orbit
- Last known active
- 1991
- End of operations
- Oct 5, 1993
Size
- Mass
- 68 kg
- Dry mass
- 68 kg
- Length
- 0.4 m
- Diameter
- 0.40 m
- Span
- 0.4 m
Launched together
Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q17265463 (CC0).