- Military
- NORAD 2121
- 1966-025A
- Low Earth orbit
Current orbit
View on live mapOrbit began over the Indian Ocean
Orbit ends over the Indian Ocean
Sunlit since
Enters the Earth’s shadow
In view from you
Nobody watches OV1-4 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 OV1-4, 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 go outside for: it is too faint to see with the naked eye from anywhere on Earth.
Timeline
- Launch
Launched, on the day GCAT records. Source
Summary
Over the Pacific Ocean LIVE
Where is OV1-4?
At 6:51:55 PM UTC OV1-4 was over the Pacific Ocean (18.9° N, 111.8° W), 997 km up, moving at 7.33 km/s and in sunlight.
What is OV1-4?
A satellite in low Earth orbit, in space since Mar 30, 1966.
Can I see OV1-4?
No, not with the naked eye: no brightness has been published for OV1-4, and nothing here estimates one.
General
- Operator
- US Air Force Office of Aerospace Research
- State
- United States of America
- Built by
- General Dynamics/Convair Division (Plant 19)
- Military
- Yes: a defence organisation flies it
- Launched
- Mass
- 87 kg
- Operating
- No: its regular operations have ended
- Orbit class
- Low Earth orbit
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
- 6:51 PM UTC
- Station time (UTC)
- 6:51 PM UTC
- Latitude / longitude
- 18.9° N, 111.8° W
- Altitude
- 997 km
- Speed
- 7.33 km/s (26,374 km/h)
- Course
- south-west
- Light
- In sunlight until 7:32 PM UTC
- Inclination
- 144.5°
- Orbital period
- 103.8 minutes
- Orbits per day
- 13.87
- This orbit
- 880 to 1,002 km
- In shadow
- 31 minutes of each orbit
- In view from
- Within 2,400 km of the point below it
- Elements epoch
- Nov 8, 2026, 2:36 AM, 16 hours old
- Source
- Position from Space-Track orbital elements of Nov 8, 2026, 2:36 AM, 16 hours old.
No operator publishes an ephemeris for OV1-4, so every position here comes from its orbital elements.
In orbit
- Close approaches
- No close approach to OV1-4 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.
Launched with
OV1-4 shares its launch, 1966-025, with 5 other bodies the catalogue lists in orbit.
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, 2:36 AM, 16 hours old.
{
"OBJECT_NAME": "OV1-4",
"OBJECT_ID": "1966-025A",
"EPOCH": "2026-11-08T02:36:46.298880",
"MEAN_MOTION": 13.87341087,
"ECCENTRICITY": 0.00838034,
"INCLINATION": 144.5058,
"RA_OF_ASC_NODE": 7.2015,
"ARG_OF_PERICENTER": 312.6457,
"MEAN_ANOMALY": 46.7192,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 2121,
"ELEMENT_SET_NO": 999,
"REV_AT_EPOCH": 7113,
"BSTAR": 0.000016532364,
"MEAN_MOTION_DOT": 0.00000288,
"MEAN_MOTION_DDOT": 0
}