Transit 5 Satellite Bus
Data current as of 2026-07-20.
The Transit 5 bus accounts for 38 cataloged objects, of which 35 are in orbit and 0 are active. 3 have reentered. Most are built by APL. The largest operator on this bus is NAVAIR. The first launched in 1962, the most recent in 1988.
35
In orbit
0
Active
38
Total launched
3
Reentered
Transit 5 launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged Transit 5 satellites.
| Manufacturer | APL |
|---|---|
| Purpose | Navigation |
| Launch mass | 54 kg |
| Dry mass | 54 kg |
| Length | 0.3 m |
| Diameter | 0.5 m |
| Span | 30 m |
| Shape | Oct Cyl + 4 Pan + Ant |
| Power | 4 deployable fixed solar arrays, batteries |
| Propulsion | ? |
| Design life | +11 years (achieved) |
| Equipment | ? |
| Typical orbit | 107 min period, 90° inclination |
Top operators
Top countries
US 38
Transit 5 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OSCAR 31 NNS 30310-60 | 19420 | 1988-074B | NAVAIR | Aug 25, 1988 | 107 min, 90.0° | Inactive | ◉ |
| OSCAR 25 NNS 30250-25 | 19419 | 1988-074A | NAVAIR | Aug 25, 1988 | 107 min, 90.0° | Inactive | ◉ |
| OSCAR 32 NNS 30320-48 | 19071 | 1988-033B | NAVAIR | Apr 26, 1988 | 108 min, 90.3° | Inactive | ◉ |
| OSCAR 23 NNS 30230-12 | 19070 | 1988-033A | NAVAIR | Apr 26, 1988 | 108 min, 90.3° | Inactive | ◉ |
| OSCAR 29 NNS 30290-52 | 18362 | 1987-080B | NAVAIR | Sep 16, 1987 | 107 min, 90.4° | Inactive | ◉ |
| OSCAR 27 NNS 30270-07 | 18361 | 1987-080A | NAVAIR | Sep 16, 1987 | 107 min, 90.4° | Inactive | ◉ |
| POLAR BEAR P87-1 | 17070 | 1986-088A | STP/APL | Nov 14, 1986 | 105 min, 89.6° | Inactive | ◉ |
| OSCAR 24 NNS 30300-20 | 15936 | 1985-066B | NAVAIR | Aug 3, 1985 | 108 min, 90.2° | Inactive | ◉ |
| OSCAR 30 NNS 30240-36 | 15935 | 1985-066A | NAVAIR | Aug 3, 1985 | 108 min, 90.2° | Inactive | ◉ |
| HILAT P83-1 | 14154 | 1983-063A | STP/APL | Jun 27, 1983 | 100 min, 82.0° | Inactive | ◉ |
| TRANSAT Transat | 10457 | 1977-106A | NAVAIR | Oct 28, 1977 | 107 min, 89.6° | Inactive | ◉ |
| P 76-5 P76-5 | 08860 | 1976-047A | STP/APL | May 22, 1976 | 105 min, 99.9° | Inactive | ◉ |
| NNSS 20 (TRANSIT 20) NNS 30200-16 | 06909 | 1973-081A | NAVAIR | Oct 30, 1973 | 105 min, 89.9° | Inactive | ◉ |
| NNSS 19 (TRANSIT 19) NNS 30190-28 | 04507 | 1970-067A | NAVAIR | Aug 27, 1970 | 107 min, 90.0° | Inactive | ◉ |
| OPS 7034 (TRANSIT 18) NNS 30180 | 03133 | 1968-012A | NAVAIR | Mar 2, 1968 | 107 min, 90.0° | Inactive | ◉ |
| OPS 4947 (TRANSIT 17) NNS 30140-56 | 02965 | 1967-092A | NAVAIR | Sep 25, 1967 | 106 min, 89.3° | Inactive | ◉ |
| OPS 7218 (TRANSIT 16) NNS 30130-40 | 02807 | 1967-048A | NAVAIR | May 18, 1967 | 107 min, 89.7° | Inactive | ◉ |
| OPS 0100 (TRANSIT 15) NNS 30120 | 02754 | 1967-034A | NAVAIR | Apr 14, 1967 | 106 min, 90.2° | Inactive | ◉ |
| OPS 2366 (TRANSIT 14) NNS 30100 | 02401 | 1966-076A | NAVAIR | Aug 18, 1966 | 106 min, 88.8° | Inactive | ◉ |
| OPS 0082 (TRANSIT 13) NNS 30090 | 02176 | 1966-041A | NAVAIR | May 19, 1966 | 103 min, 90.2° | Inactive | ◉ |
| OPS 1117 (TRANSIT 12) NNS 30080 | 02119 | 1966-024A | BUWEPS | Mar 26, 1966 | 105 min, 89.6° | Inactive | ◉ |
| OPS 1593 (TRANSIT 11) NNS 30070 | 01952 | 1966-005A | BUWEPS | Jan 28, 1966 | 105 min, 90.1° | Inactive | ◉ |
| OPS 1509 (TRANSIT 10) NNS 30060 | 01864 | 1965-109A | BUWEPS | Dec 22, 1965 | 104 min, 89.1° | Inactive | ◉ |
| OPS 8464 (TRANSIT 5B-7) NNS 30050 | 01514 | 1965-065F | BUWEPS | Aug 13, 1965 | 108 min, 90.0° | Inactive | ◉ |
| OPS 8480 (TRANSIT 5B-6) NNS 30040 | 01420 | 1965-048A | BUWEPS | Jun 24, 1965 | 107 min, 89.9° | Inactive | ◉ |
| EXPLORER 27 Explorer 27 | 01328 | 1965-032A | GSFC | Apr 29, 1965 | 108 min, 41.2° | Inactive | ◉ |
| OPS 7087 NNS 30030 | 01303 | 1965-017A | BUWEPS | Mar 11, 1965 | 89 min, 90.0° | Reentered | ◉ |
| OPS 6582 (TRANSIT 5B-5) NNS 30020 | 00965 | 1964-083D | BUWEPS | Dec 13, 1964 | 106 min, 90.1° | Inactive | ◉ |
| OPS 6582 (TRANSIT 5E-5) Transit VE-5 | 00959 | 1964-083C | BUWEPS | Dec 13, 1964 | 106 min, 90.0° | Inactive | ◉ |
| EXPLORER 22 Explorer 22 | 00899 | 1964-064A | GSFC | Oct 10, 1964 | 104 min, 79.7° | Inactive | ◉ |
| OPS 5798 (TRANSIT 5B-4) NNS 30010 | 00897 | 1964-063B | BUWEPS | Oct 6, 1964 | 106 min, 90.2° | Inactive | ◉ |
| OPS 4412 (TRANSIT 9) Transit VC | 00801 | 1964-026A | BUWEPS | Jun 4, 1964 | 102 min, 90.5° | Inactive | ◉ |
| TRANSIT 5E-3 Transit VE-3 | 00705 | 1963-049C | BUWEPS | Dec 5, 1963 | 107 min, 89.9° | Inactive | ◉ |
| TRANSIT 5B-2 Transit VBN-2 | 00704 | 1963-049B | BUWEPS | Dec 5, 1963 | 107 min, 89.9° | Inactive | ◉ |
| RADIATION SAT (5E-1) Transit VE-1 | 00671 | 1963-038C | BUWEPS | Sep 28, 1963 | 107 min, 90.0° | Inactive | ◉ |
| TRANSIT 5B-1 Transit VBN-1 | 00670 | 1963-038B | BUWEPS | Sep 28, 1963 | 107 min, 90.0° | Inactive | ◉ |
| TRANSIT 5A-3 Transit VA-3 | 00594 | 1963-022A | BUWEPS | Jun 16, 1963 | 88 min, 89.8° | Reentered | ◉ |
| TRANSIT 5A Transit VA-1 | 00509 | 1962-071A | BUWEPS | Dec 19, 1962 | 88 min, 90.6° | Reentered | ◉ |
Frequently asked questions
How many Transit 5 satellites are there?
The catalog lists 38 objects built on the Transit 5 bus. 35 are in orbit and 3 have reentered.
How many Transit 5 satellites are in orbit?
35 Transit 5 objects are currently in orbit, of which 0 carry an active status.
Who builds the Transit 5 bus?
The Transit 5 bus is most commonly built by APL.
When did the first Transit 5 satellite launch?
The first cataloged Transit 5 satellite launched in 1962, and the most recent in 1988.