NAVSTAR

NORAD 28361 · COSPAR 2004-023A · ACTIVE

Orbit: #16358 @ 19760 x 20605 km x 54.9596 deg

CURRENT ORBIT DATA

TLE epoch 2026-10-22 00:56 UTC Â· 98.8 h old

Orbit history

// altitude & velocity from orbital-data archive

Trend: —

Altitude —

Velocity —

Next visible passes

// click to check

Current TLE

// onowactive

NAVSTAR 55 (USA 178)
1 28361U 04023A 26295.03938444 .00000038 00000-0 00000-0 0 09999
2 28361 54.9596 81.5915 0159138 304.9313 240.5391 2.00562656163588

TLE data & history 🚀 Launch manifest

Spacecraft info

// UCS Satellite Database

Launch date

June 23rd 2004

Spacecraft age

22 years, 4 months

Distance travelled

—

Expected lifetime

—

Operator

DoD/US Air Force

Purpose

Navigation/Global Positioning

Orbit class

MEO Â· Non-Polar Inclined

Launch site

Cape Canaveral

Launch vehicle

Delta 2

Contractor

Lockheed Martin

Launch mass

2,217 kg

Power

1,136 W

Orbit elements

// from current orbital elements

Inclination

54.9596Â°

Period

717.98 min

Perigee

19760 km

Apogee

20605 km

Eccentricity

0.0159138

RAAN

81.5915Â°

Arg of Perigee

304.9313Â°

Mean Motion

2.00562656 rev/d