SBIRS GEO-4

LIVE
See on the map

Link to this page

https://orbinauts.com/satellites/41937

  • Military
  • SBIRS GEO 4 (USA 273)
  • NORAD 41937
  • 2017-004A
  • Geostationary

Current orbit

Where SBIRS GEO-4 is on the world map, with the orbit it is flying
View on live map

One orbit takes a day, as long as the Earth takes to turn, so SBIRS GEO-4 keeps above 21.2° W of the equator and never crosses the sky.

Past trackNext orbits

It never rises or sets

SBIRS GEO-4 turns with the Earth, standing over one longitude of the equator. From anywhere it can be seen at all it is up day and night, in the same direction, so there is no pass to wait for.

No brightness has been published for SBIRS GEO-4, 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 wait for: it never crosses the sky. From the half of the Earth it stands over it keeps the same point day and night, and from the other half it never rises at all.

Timeline

  1. Launch

    Launched, on the day GCAT records. Source

Summary

Over the Atlantic Ocean LIVE

Where is SBIRS GEO-4?

At 6:20:46 PM UTC SBIRS GEO-4 was over the Atlantic Ocean (2.4° S, 21.2° W), 35,784 km up, standing over one longitude of the equator and in sunlight.

What is SBIRS GEO-4?

A satellite in geostationary orbit, in space since Jan 21, 2017.

Can I see SBIRS GEO-4?

No, not with the naked eye, and it never crosses the sky: SBIRS GEO-4 stands over 21.2° W of the equator.

General

Operator
US Air Force Space Command
State
United States of America
Built by
Lockheed Martin Space Systems (Sunnyvale)
Military
Yes: a defence organisation flies it
Launched
Mass
about 4.5 t
Operating
Yes
Orbit class
Geostationary

From GCAT, Jonathan McDowell’s general catalogue, licensed CC BY 4.0: the operator, the state, the manufacturer, 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
6:20 PM UTC
Station time (UTC)
6:20 PM UTC
Latitude / longitude
2.4° S, 21.2° W
Altitude
35,784 km
Speed
3.08 km/s (11,070 km/h)
Course
Stands over 21.2° W
Light
In sunlight
Inclination
2.5°
Orbital period
1,436.1 minutes
Orbits per day
1
This orbit
35,781 to 35,795 km
In view from
Within 7,940 km of the point below it
Elements epoch
Nov 8, 2026, 7:26 AM, 10 hours old
Source
Position from Space-Track orbital elements of Nov 8, 2026, 7:26 AM, 10 hours old.

No operator publishes an ephemeris for SBIRS GEO-4, so every position here comes from its orbital elements.

In orbit

Close approaches
No close approach to SBIRS GEO-4 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, 7:26 AM, 10 hours old.

{
  "OBJECT_NAME": "SBIRS GEO 4 (USA 273)",
  "OBJECT_ID": "2017-004A",
  "EPOCH": "2026-11-08T07:26:21.535872",
  "MEAN_MOTION": 1.00271818,
  "ECCENTRICITY": 0.00016379,
  "INCLINATION": 2.5291,
  "RA_OF_ASC_NODE": 46.4435,
  "ARG_OF_PERICENTER": 181.8705,
  "MEAN_ANOMALY": 269.599,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 41937,
  "ELEMENT_SET_NO": 999,
  "REV_AT_EPOCH": 3604,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": -0.0000016,
  "MEAN_MOTION_DDOT": 0
}