LEOStar T-200 Satellite Bus
Data current as of 2026-07-20.
The LEOStar T-200 bus accounts for 6 cataloged objects, of which 3 are in orbit and 0 are active. 3 have reentered. Most are built by TRWC/CTA. The largest operator on this bus is STP. The first launched in 1994, the most recent in 1999.
3
In orbit
0
Active
6
Total launched
3
Reentered
LEOStar T-200 launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged LEOStar T-200 satellites.
| Manufacturer | TRWC/CTA |
|---|---|
| Purpose | Earth observation |
| Launch mass | 403 kg |
| Dry mass | 180 kg |
| Length | 2 m |
| Diameter | 1 m |
| Span | 3 m |
| Shape | Hex Cyl + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | 2 x 147 kN thrusters + 4 x 4.45 kN thrusters |
| Design life | 2 years (design) |
| Equipment | 10 TAOS experiments |
| Typical orbit | 97 min period, 0° inclination |
Top operators
Top countries
US 5 TW 1
LEOStar T-200 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| FORMOSAT-1 (ROCSAT 1) Formosat-1 | 25616 | 1999-002A | NSPT | Jan 27, 1999 | 88 min, 34.9° | Reentered | ◉ |
| STEP M4 STEP M4 | 25013 | 1997-063A | STP | Oct 22, 1997 | 88 min, 44.9° | Reentered | ◉ |
| SSTI LEWIS Lewis | 24909 | 1997-044A | TRW/NASA | Aug 23, 1997 | 87 min, 97.5° | Reentered | ◉ |
| TOMS EP Earth Probe TOMS | 23940 | 1996-037A | GSFC | Jul 2, 1996 | 99 min, 98.5° | Inactive | ◉ |
| STEP 2 STEP M2 | 23105 | 1994-029A | STP | May 19, 1994 | 97 min, 81.9° | Inactive | ◉ |
| USA 101 STEP M0 | 23030 | 1994-017A | AFSMC | Mar 13, 1994 | · | Inactive | ◉ |
Frequently asked questions
How many LEOStar T-200 satellites are there?
The catalog lists 6 objects built on the LEOStar T-200 bus. 3 are in orbit and 3 have reentered.
How many LEOStar T-200 satellites are in orbit?
3 LEOStar T-200 objects are currently in orbit, of which 0 carry an active status.
Who builds the LEOStar T-200 bus?
The LEOStar T-200 bus is most commonly built by TRWC/CTA.
When did the first LEOStar T-200 satellite launch?
The first cataloged LEOStar T-200 satellite launched in 1994, and the most recent in 1999.