Explorer 25

LIVE
See on the map

Link to this page

https://orbinauts.com/satellites/932

  • EXPLORER 25 (INJUN-4)
  • NORAD 932
  • 1964-076B
  • Medium Earth orbit

Current orbit

Where Explorer 25 is on the world map, with the orbit it is flying
View on live map

Orbit began over the Pacific Ocean

Orbit ends over the Pacific Ocean

In the Earth’s shadow since

Back in sunlight

Past trackNext orbits

In view from you

Nobody watches Explorer 25 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 Explorer 25, 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 too faint to see with the naked eye from anywhere on Earth.

Timeline

  1. Launch

    Launched, on the day GCAT records. Source

Summary

Over India LIVE

Where is Explorer 25?

At 9:13:06 PM UTC Explorer 25 was over India (17.1° N, 78.1° E), 1,986 km up, moving at 6.64 km/s and in the Earth’s shadow.

What is Explorer 25?

A satellite in medium Earth orbit, in space since Nov 21, 1964.

Can I see Explorer 25?

No, not with the naked eye: no brightness has been published for Explorer 25, and nothing here estimates one.

General

Operator
NASA Langley Research Center
State
United States of America
Built by
Bendix Systems Div.
Launched
Mass
41 kg
Operating
Orbit class
Medium Earth orbit

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

Latest orbital data

Position received
9:13 PM UTC
Station time (UTC)
9:13 PM UTC
Latitude / longitude
17.1° N, 78.1° E
Altitude
1,986 km
Speed
6.64 km/s (23,897 km/h)
Course
south
Light
In the Earth’s shadow until 9:23 PM UTC
Inclination
81.3°
Orbital period
113.6 minutes
Orbits per day
12.67
This orbit
522 to 2,258 km
In shadow
27 minutes of each orbit
In view from
Within 3,490 km of the point below it
Elements epoch
Nov 8, 2026, 3:12 AM, 18 hours old
Source
Position from Space-Track orbital elements of Nov 8, 2026, 3:12 AM, 18 hours old.

No operator publishes an ephemeris for Explorer 25, so every position here comes from its orbital elements.

In orbit

Close approaches
No close approach to Explorer 25 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.

Launched with

Explorer 25 shares its launch, 1964-076, with one other body the catalogue lists in orbit.

BodyWhat it is
SCOUT X-4 R/BRocket body

Read from the international designators of the US catalogue: the year and the launch number every piece of one launch shares. A body that has come down is no longer listed.

Data and API

The current elements from Space-Track as an OMM object, epoch Nov 8, 2026, 3:12 AM, 18 hours old.

{
  "OBJECT_NAME": "EXPLORER 25 (INJUN-4)",
  "OBJECT_ID": "1964-076B",
  "EPOCH": "2026-11-08T03:12:27.853344",
  "MEAN_MOTION": 12.67372047,
  "ECCENTRICITY": 0.1117046,
  "INCLINATION": 81.3388,
  "RA_OF_ASC_NODE": 267.6702,
  "ARG_OF_PERICENTER": 301.863,
  "MEAN_ANOMALY": 47.8436,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 932,
  "ELEMENT_SET_NO": 999,
  "REV_AT_EPOCH": 83736,
  "BSTAR": 0.00028865897,
  "MEAN_MOTION_DOT": 0.00000811,
  "MEAN_MOTION_DDOT": 0
}