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[1]CelesTrak (opens in new tab)orbital elements
[2]GCAT / J. McDowell (opens in new tab)launch catalog
[3]Wikidata (opens in new tab)metadata enrichment
[4]SatNOGS DB (opens in new tab)radio transmitters (CC BY-SA 4.0)

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NAVSTAR 55 (USA 178), NORAD 28361 orbital data · OrbitalWiki

Catalog Operators Showcases Method Developers Pricing

Index/Operators/US Air Force Space and Missile Center/28361

MEOStandbyPayload

NAVSTAR 55 (USA 178)

NORAD 28361COSPAR 2004-023AEpoch Sep 11, 2026

NAVSTAR 55 (USA 178) is a payload in MEO orbit, operated by US Air Force Space and Missile Center, launched 2004.

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Operator

US Air Force Space and Missile CenterProbable

via GCAT — Jonathan McDowell's General Catalog

Country

United StatesProbable

via GCAT — Jonathan McDowell's General Catalog

Launch date

2004-06-23Probable

via GCAT — Jonathan McDowell's General Catalog

End of transmission

2020-03-02Probable

via GCAT — Jonathan McDowell's General Catalog

Object class

PAYLOADProbable

via GCAT — Jonathan McDowell's General Catalog

Operational status

STANDBYProbable

via CelesTrak SATCAT

Launch mass (kg)

1077Probable

via GCAT — Jonathan McDowell's General Catalog

Orbital regime

MEOProbable

via GCAT — Jonathan McDowell's General Catalog

Launch site

Not availableUnknown

source unknown

Launch vehicle

Not availableUnknown

source unknown

Not available in the current data

· Alternate names
· Constellation membership

Data quality

Quality95 / 100

OrbitalWiki

Open satellite records with source claims attached. Use the UI for lookup or the API for products, research, and internal tools.

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How many satellites are in orbit right now?
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How many Starlink satellites are there?
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What is the oldest satellite still in orbit?
What orbits are satellites in?
Which countries operate the most satellites?
Which operators run the most satellites?

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Sources

[1]CelesTrak (opens in new tab)orbital elements
[2]GCAT / J. McDowell (opens in new tab)launch catalog
[3]Wikidata (opens in new tab)metadata enrichment

Related satellites

NAVSTAR 56 (USA 180)Same operator
NAVSTAR 54 (USA 177)Same operator
NAVSTAR 57 (USA 183)Same operator
USA 176 (DSP 22)Same operator
NAVSTAR 58 (USA 190)Same operator

Where this record sits

All US Air Force Space and Missile Center satellites
United States satellites and space activity
Everything in MEO

It went up on launch 2004-023, alongside everything else on that flight

See it moving on the 3D globe alongside every other active object, propagated in your browser.

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//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Sep 12, 2026.

[4]

SatNOGS DB (opens in new tab)radio transmitters (CC BY-SA 4.0)

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OrbitalWiki / open database / ODbL-1.0Orbital data is approximate and not for operations