GPS IIR-12

LIVE
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Link to this page

https://orbinauts.com/satellites/28361

  • Navigation satellite
  • Military
  • NAVSTAR 55 (USA 178)
  • NORAD 28361
  • 2004-023A
  • Medium Earth orbit

Current orbit

Where GPS IIR-12 is on the world map, with the orbit it is flying
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Orbit began over the Indian Ocean

Orbit ends over the Atlantic Ocean

Past trackNext orbits

In view from you

Nobody watches GPS IIR-12 go over, but a receiver still asks whether it is above the horizon. Say where you are and this card answers.

Your position is rounded to about a kilometre and sent only to the Orbinauts API, to find the pass.

No brightness has been published for GPS IIR-12, so it is not a naked-eye satellite and no city page carries pass times for it. Nothing here estimates one.

Seeing it

There is nothing to go outside for: it is far too high and too faint for the naked eye. What you notice of it is a position fix, and the card above says whether it is above your horizon to give you one.

Timeline

  1. Launch

    Launched, on the day GCAT records. Source

Summary

Over the Timor Sea LIVE

Where is GPS IIR-12?

At 4:55:17 PM UTC GPS IIR-12 was over the Timor Sea (14.6° S, 128.6° E), 19,843 km up, moving at 3.92 km/s and in sunlight.

What is GPS IIR-12?

A navigation satellite in medium Earth orbit, in space since Jun 23, 2004.

Can I see GPS IIR-12?

No, not with the naked eye: no brightness has been published for GPS IIR-12, and nothing here estimates one; receivers on the ground use its signals instead, whenever it is above their horizon.

General

Operator
US Air Force Space and Missile Center
State
United States of America
Built by
Lockheed Martin Missiles and Space, Sunnyvale
What it is
Navigation satellite
Military
Yes: a defence organisation flies it
Launched
Mass
about 1.1 t
Operating
Orbit class
Medium Earth orbit

From GCAT, Jonathan McDowell’s general catalogue, licensed CC BY 4.0: the operator, the state, the manufacturer, what it is for, that a defence organisation flies it, the launch day, the mass, and whether it is operating. The orbit class is read from its current elements.

Latest orbital data

Position received
4:55 PM UTC
Station time (UTC)
4:55 PM UTC
Latitude / longitude
14.6° S, 128.6° E
Altitude
19,843 km
Speed
3.92 km/s (14,126 km/h)
Course
north
Light
In sunlight
Inclination
55°
Orbital period
718 minutes
Orbits per day
2.01
This orbit
19,758 to 20,607 km
In shadow
None of this orbit
In view from
Within 7,360 km of the point below it
Elements epoch
Nov 8, 2026, 5:37 AM, 11 hours old
Source
Position from Space-Track orbital elements of Nov 8, 2026, 5:37 AM, 11 hours old.

No operator publishes an ephemeris for GPS IIR-12, so every position here comes from its orbital elements.

In orbit

Close approaches
No close approach to GPS IIR-12 has been reported publicly in the past thirty days.

From Space-Track’s public conjunction messages; the latest report was issued Nov 8, 2026, 1:11 PM, 3 hours old. Only approaches serious enough to be reported publicly are listed: within three days and, for two bodies near the Earth, closer than a kilometre with a chance of a collision above 1 in 10,000, the level at which NASA moves the ISS.

See every close approach reported in orbit.

Data and API

The current elements from Space-Track as an OMM object, epoch Nov 8, 2026, 5:37 AM, 11 hours old.

{
  "OBJECT_NAME": "NAVSTAR 55 (USA 178)",
  "OBJECT_ID": "2004-023A",
  "EPOCH": "2026-11-08T05:37:16.987296",
  "MEAN_MOTION": 2.00563354,
  "ECCENTRICITY": 0.01597434,
  "INCLINATION": 54.9731,
  "RA_OF_ASC_NODE": 80.8985,
  "ARG_OF_PERICENTER": 305.2448,
  "MEAN_ANOMALY": 55.7526,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 28361,
  "ELEMENT_SET_NO": 999,
  "REV_AT_EPOCH": 16393,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": -3.4e-7,
  "MEAN_MOTION_DDOT": 0
}