US-A reactor Satellite Bus
Data current as of 2026-07-20.
The US-A reactor bus accounts for 31 cataloged objects, of which 30 are in orbit and 0 are active. 1 have reentered. Most are built by KOMET. The largest operator on this bus is VMF. The first launched in 1968, the most recent in 1988.
30
In orbit
0
Active
31
Total launched
1
Reentered
US-A reactor launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged US-A reactor satellites.
| Manufacturer | KOMET |
|---|---|
| Purpose | Ocean surveillance, active radar |
| Launch mass | 1154 kg |
| Dry mass | 1154 kg |
| Length | 5.8 m |
| Diameter | 1.3 m |
| Span | 5.8 m |
| Shape | Cyl |
| Power | BES-5 nuclear reactor |
| Equipment | Radar |
| Typical orbit | 104 min period, 65° inclination |
Top operators
VMF 26 TSKBM 5
Top countries
SU 31
US-A reactor satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| COSMOS 1932 Kosmos-1932 | 18957 | 1988-019A | VMF | Mar 14, 1988 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1900 Kosmos-1900 | 18665 | 1987-101A | VMF | Dec 12, 1987 | 99 min, 66.1° | Inactive | ◉ |
| COSMOS 1860 Kosmos-1860 | 18122 | 1987-052A | VMF | Jun 18, 1987 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1771 Kosmos-1771 | 16917 | 1986-062A | VMF | Aug 20, 1986 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1736 Kosmos-1736 | 16647 | 1986-024A | VMF | Mar 21, 1986 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1677 Kosmos-1677 | 15986 | 1985-075A | VMF | Aug 23, 1985 | 104 min, 64.7° | Inactive | ◉ |
| COSMOS 1670 Kosmos-1670 | 15930 | 1985-064A | VMF | Aug 1, 1985 | 104 min, 64.9° | Inactive | ◉ |
| COSMOS 1607 Kosmos-1607 | 15378 | 1984-112A | VMF | Oct 31, 1984 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1579 Kosmos-1579 | 15085 | 1984-069A | VMF | Jun 29, 1984 | 104 min, 65.1° | Inactive | ◉ |
| COSMOS 1412 Kosmos-1412 | 13600 | 1982-099A | VMF | Oct 2, 1982 | 104 min, 64.8° | Inactive | ◉ |
| COSMOS 1402 Kosmos-1402 | 13441 | 1982-084A | VMF | Dec 28, 1982 | 87 min, 65.0° | Reentered | ◉ |
| COSMOS 1372 Kosmos-1372 | 13243 | 1982-052A | VMF | Jun 1, 1982 | 104 min, 64.9° | Inactive | ◉ |
| COSMOS 1365 Kosmos-1365 | 13175 | 1982-043A | VMF | May 14, 1982 | 104 min, 65.1° | Inactive | ◉ |
| COSMOS 1299 Kosmos-1299 | 12783 | 1981-081A | VMF | Aug 24, 1981 | 104 min, 65.1° | Inactive | ◉ |
| COSMOS 1266 Kosmos-1266 | 12409 | 1981-037A | VMF | Apr 21, 1981 | 104 min, 64.8° | Inactive | ◉ |
| COSMOS 1249 Kosmos-1249 | 12319 | 1981-021A | VMF | Mar 5, 1981 | 104 min, 65.0° | Inactive | ◉ |
| COSMOS 1176 Kosmos-1176 | 11788 | 1980-034A | VMF | Apr 29, 1980 | 103 min, 64.8° | Inactive | ◉ |
| COSMOS 952 Kosmos-952 | 10358 | 1977-088A | VMF | Sep 16, 1977 | 104 min, 64.9° | Inactive | ◉ |
| COSMOS 861 Kosmos-861 | 09494 | 1976-104A | VMF | Oct 21, 1976 | 104 min, 64.9° | Inactive | ◉ |
| COSMOS 860 Kosmos-860 | 09486 | 1976-103A | VMF | Oct 17, 1976 | 104 min, 64.7° | Inactive | ◉ |
| COSMOS 785 Kosmos-785 | 08473 | 1975-116A | VMF | Dec 12, 1975 | 104 min, 65.1° | Inactive | ◉ |
| COSMOS 724 Kosmos-724 | 07727 | 1975-025A | VMF | Apr 7, 1975 | 103 min, 65.6° | Inactive | ◉ |
| COSMOS 723 Kosmos-723 | 07718 | 1975-024A | VMF | Apr 2, 1975 | 104 min, 64.7° | Inactive | ◉ |
| COSMOS 654 Kosmos-654 | 07297 | 1974-032A | VMF | May 17, 1974 | 104 min, 64.9° | Inactive | ◉ |
| COSMOS 651 Kosmos-651 | 07291 | 1974-029A | VMF | May 15, 1974 | 103 min, 65.0° | Inactive | ◉ |
| COSMOS 626 Kosmos-626 | 07005 | 1973-108A | VMF | Dec 27, 1973 | 104 min, 65.4° | Inactive | ◉ |
| COSMOS 516 Kosmos-516 | 06154 | 1972-066A | TSKBM | Aug 21, 1972 | 105 min, 64.8° | Inactive | ◉ |
| COSMOS 469 Kosmos-469 | 05721 | 1971-117A | TSKBM | Dec 25, 1971 | 105 min, 64.5° | Inactive | ◉ |
| COSMOS 402 Kosmos-402 | 05105 | 1971-025A | TSKBM | Apr 1, 1971 | 105 min, 65.0° | Inactive | ◉ |
| COSMOS 367 Kosmos-367 | 04564 | 1970-079A | TSKBM | Oct 3, 1970 | 104 min, 65.3° | Inactive | ◉ |
| COSMOS 209 Kosmos-209 | 03158 | 1968-023A | TSKBM | Mar 22, 1968 | 103 min, 65.3° | Inactive | ◉ |
Frequently asked questions
How many US-A reactor satellites are there?
The catalog lists 31 objects built on the US-A reactor bus. 30 are in orbit and 1 have reentered.
How many US-A reactor satellites are in orbit?
30 US-A reactor objects are currently in orbit, of which 0 carry an active status.
Who builds the US-A reactor bus?
The US-A reactor bus is most commonly built by KOMET.
When did the first US-A reactor satellite launch?
The first cataloged US-A reactor satellite launched in 1968, and the most recent in 1988.