- Military
- CALSPHERE 4(A)
- NORAD 1520
- 1965-065H
- Low Earth orbit
Current orbit
View on live mapOrbit began over the Bering Sea
Orbit ends over the Sea of Okhotsk
In view from you
Nobody watches Calsphere 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 Calsphere, 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 Atlantic Ocean LIVE
Where is Calsphere?
At 6:36:21 PM UTC Calsphere was over the Atlantic Ocean (54.8° S, 25.9° W), 1,198 km up, moving at 7.23 km/s and in sunlight.
What is Calsphere?
A satellite in low Earth orbit, in space since Aug 13, 1965.
Can I see Calsphere?
No, not with the naked eye: no brightness has been published for Calsphere, and nothing here estimates one.
General
- Operator
- Naval Research Lab
- State
- United States of America
- Built by
- Naval Research Lab
- Military
- Yes: a defence organisation flies it
- Launched
- Mass
- 4 kg
- Operating
- 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
- 6:36 PM UTC
- Station time (UTC)
- 6:36 PM UTC
- Latitude / longitude
- 54.8° S, 25.9° W
- Altitude
- 1,198 km
- Speed
- 7.23 km/s (26,021 km/h)
- Course
- south
- Light
- In sunlight
- Inclination
- 89.9°
- Orbital period
- 107.8 minutes
- Orbits per day
- 13.36
- This orbit
- 1,067 to 1,174 km
- In shadow
- None of this orbit
- In view from
- Within 2,670 km of the point below it
- Elements epoch
- Nov 8, 2026, 5:43 AM, 12 hours old
- Source
- Position from Space-Track orbital elements of Nov 8, 2026, 5:43 AM, 12 hours old.
No operator publishes an ephemeris for Calsphere, so every position here comes from its orbital elements.
In orbit
- Close approaches
- No close approach to Calsphere 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
Calsphere shares its launch, 1965-065, with 13 other bodies the catalogue lists in orbit.
| Body | What it is |
|---|---|
| THOR ABLESTAR DEB | Debris |
| THOR ABLESTAR R/B | Rocket body |
| DODECAPOLE 2 | Satellite |
| THOR ABLESTAR DEB | Debris |
| TEMPSAT 1 | Satellite |
| OPS 8464 (TRANSIT 5B-7) | Navigation satellite |
| NAVSPASUR ROD 1 | Satellite |
| THOR ABLESTAR DEB | Debris |
| THOR ABLESTAR DEB | Debris |
| PORCUPINE 2 | Satellite |
| THOR ABLESTAR DEB | Debris |
| THOR ABLESTAR DEB | Debris |
| DODECAPOLE 2 DEB | Debris |
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, 5:43 AM, 12 hours old.
{
"OBJECT_NAME": "CALSPHERE 4(A)",
"OBJECT_ID": "1965-065H",
"EPOCH": "2026-11-08T05:43:25.649184",
"MEAN_MOTION": 13.36299445,
"ECCENTRICITY": 0.00711984,
"INCLINATION": 89.8843,
"RA_OF_ASC_NODE": 120.9828,
"ARG_OF_PERICENTER": 57.7374,
"MEAN_ANOMALY": 116.1655,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 1520,
"ELEMENT_SET_NO": 999,
"REV_AT_EPOCH": 98194,
"BSTAR": 0.00020522814,
"MEAN_MOTION_DOT": 0.00000117,
"MEAN_MOTION_DDOT": 0
}