Series 4000 Satellite Bus
Data current as of 2026-07-20.
The Series 4000 bus accounts for 18 cataloged objects, of which 18 are in orbit and 11 are active. Most are built by LMMS. The largest operator on this bus is AFSMC. The first launched in 2000, the most recent in 2009.
18
In orbit
11
Active
18
Total launched
0
Reentered
Series 4000 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged Series 4000 satellites.
| Manufacturer | LMMS |
|---|---|
| Purpose | Navigation |
| Launch mass | 1077 kg |
| Dry mass | 910 kg |
| Length | 1.5 m |
| Diameter | 1.9 m |
| Span | 19.3 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | Star 37XFP |
| Design life | 10 years |
| Equipment | ? |
| Typical orbit | 718 min period, 55° inclination |
Top operators
AFSMC 18
Top countries
US 18
Series 4000 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| NAVSTAR 64 (USA 206) GPS IIR-21(M) | 35752 | 2009-043A | AFSMC | Aug 17, 2009 | 718 min, 56.2° | Active | ◉ |
| NAVSTAR 63 (USA 203) GPS IIR-20(M) | 34661 | 2009-014A | AFSMC | Mar 24, 2009 | 718 min, 54.5° | Inactive | ◉ |
| NAVSTAR 62 (USA 201) GPS IIR-19(M) | 32711 | 2008-012A | AFSMC | Mar 15, 2008 | 718 min, 54.5° | Active | ◉ |
| NAVSTAR 61 (USA 199) GPS IIR-18(M) | 32384 | 2007-062A | AFSMC | Dec 20, 2007 | 718 min, 55.0° | Active | ◉ |
| NAVSTAR 60 (USA 196) GPS IIR-17(M) | 32260 | 2007-047A | AFSMC | Oct 17, 2007 | 718 min, 54.1° | Active | ◉ |
| NAVSTAR 59 (USA 192) GPS IIR-16(M) | 29601 | 2006-052A | AFSMC | Nov 17, 2006 | 718 min, 54.9° | Active | ◉ |
| NAVSTAR 58 (USA 190) GPS IIR-15(M) | 29486 | 2006-042A | AFSMC | Sep 25, 2006 | 718 min, 54.7° | Active | ◉ |
| NAVSTAR 57 (USA 183) GPS IIR-14(M) | 28874 | 2005-038A | AFSMC | Sep 26, 2005 | 718 min, 54.9° | Active | ◉ |
| NAVSTAR 56 (USA 180) GPS IIR-13 | 28474 | 2004-045A | AFSMC | Nov 6, 2004 | 718 min, 55.1° | Active | ◉ |
| NAVSTAR 55 (USA 178) GPS IIR-12 | 28361 | 2004-023A | AFSMC | Jun 23, 2004 | 718 min, 54.9° | Inactive | ◉ |
| NAVSTAR 54 (USA 177) GPS IIR-11 | 28190 | 2004-009A | AFSMC | Mar 20, 2004 | 718 min, 54.8° | Active | ◉ |
| NAVSTAR 53 (USA 175) GPS IIR-10 | 28129 | 2003-058A | AFSMC | Dec 21, 2003 | 747 min, 55.0° | Inactive | ◉ |
| NAVSTAR 52 (USA 168) GPS IIR-9 | 27704 | 2003-010A | AFSMC | Mar 31, 2003 | 752 min, 54.8° | Inactive | ◉ |
| NAVSTAR 51 (USA 166) GPS IIR-8 | 27663 | 2003-005A | AFSMC | Jan 29, 2003 | 718 min, 54.9° | Active | ◉ |
| NAVSTAR 50 (USA 156) GPS IIR-7 | 26690 | 2001-004A | AFSMC | Jan 30, 2001 | 752 min, 55.2° | Inactive | ◉ |
| NAVSTAR 49 (USA 154) GPS IIR-6 | 26605 | 2000-071A | AFSMC | Nov 10, 2000 | 718 min, 55.6° | Inactive | ◉ |
| NAVSTAR 48 (USA 151) GPS IIR-5 | 26407 | 2000-040A | AFSMC | Jul 16, 2000 | 718 min, 54.8° | Active | ◉ |
| NAVSTAR 47 (USA 150) GPS IIR-4 | 26360 | 2000-025A | AFSMC | May 11, 2000 | 718 min, 55.2° | Inactive | ◉ |
Frequently asked questions
How many Series 4000 satellites are there?
The catalog lists 18 objects built on the Series 4000 bus. 18 are in orbit and 0 have reentered.
How many Series 4000 satellites are in orbit?
18 Series 4000 objects are currently in orbit, of which 11 carry an active status.
Who builds the Series 4000 bus?
The Series 4000 bus is most commonly built by LMMS.
When did the first Series 4000 satellite launch?
The first cataloged Series 4000 satellite launched in 2000, and the most recent in 2009.