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Primary source of unclassified orbital elements
Orbital elements based on amateur observations
| Geosynchronous Satellites - "USA" and "OPS" Series
This a list of satellites in the series of satelllites named 'USA xxx' or from the predecessor 'OPS' designations in order of real name which is often sometimes avoided in open discussion.
The page is a snapshot and is updated daily.
The more inclined or eccentric the orbit, the larger the error margin of the geosynchronous location. Even the worst case should, however, be within ±3 degrees of reality. Only satellites exhibiting less than 0.25° per day of drift are included.
Appearance in this list does not mean that the satellite is under control at its location. Some older satellites have drifted to 'wells' in the Earth's gravitational field and oscillate around that location giving the appearance of an intentionally geosynchronous orbit. This includes a number of spent rocket bodies.
Other lists of USA and OPS geosynchronous satellites in different orders of presentation can be found from the left hand menu.
| Satellite |
Cat no |
Desig- nation |
Loca- tion |
Orbit Date |
Orbit |
| Adv Orion? (USA 237) |
38528 |
2011-034A |
52.6 E |
2013 Apr 29 |
35612 x 35963 km, 1436.12 min, 3°.03 |
| Adv Orion/Mentor 3 (USA 171) |
27937 |
2003-041A |
67.9 E |
2013 Apr 29 |
35588 x 35986 km, 1436.12 min, 6°.26 |
| Adv Orion/Mentor 5 (USA 223) |
37232 |
2010-063A |
95.9 E |
2013 May 14 |
35595 x 35979 km, 1436.12 min, 5°.09 |
| AEHF SV-1 (USA 214) |
36868 |
2010-039A |
69.0 W |
2013 May 8 |
35768 x 35806 km, 1436.12 min, 3°.19 |
| AEHF SV-2 (USA 235) |
38254 |
2012-019A |
120.0 W |
2013 Mar 13 |
35766 x 35808 km, 1436.12 min, 3°.19 |
| Aquacade 3 (OPS 4258) |
10508 |
1977-114A |
99.9 W |
2012 Sep 9 |
35729 x 35908 km, 1437.71 min, 18°.94 |
| Canyon 3 (OPS 7329) |
4510 |
1970-069A |
178.5 W |
2013 Jan 1 |
32226 x 39344 km, 1435.99 min, 16°.19 |
| Canyon 5 (OPS 9390) |
6317 |
1972-101A |
77.8 E |
2012 Jun 18 |
30139 x 41372 km, 1434.50 min, 19°.65 |
| Canyon 7 (OPS 9751) |
10016 |
1977-038A |
92.1 E |
2013 May 4 |
30538 x 41044 km, 1436.31 min, 11°.63 |
| Chalet 2 (OPS 1948) |
11558 |
1979-086A |
101.6 W |
2012 Oct 20 |
30659 x 40985 km, 1437.89 min, 6°.83 |
| Chalet 6 (USA 37) |
19976 |
1989-035A |
101.3 E |
2013 Apr 21 |
31671 x 39884 km, 1435.62 min, 7°.28 |
| DSCS II A-1 (OPS 9431) |
5587 |
1971-095A |
101.8 W |
2013 May 13 |
35758 x 35809 km, 1435.93 min, 11°.54 |
| DSCS II A-2 (OPS 9432) |
5588 |
1971-095B |
180.0 E |
2013 May 15 |
35780 x 35809 km, 1436.52 min, 11°.48 |
| DSCS III F- 6 (USA 82) |
22009 |
1992-037A |
88.1 E |
2013 Jan 1 |
35773 x 35801 km, 1436.12 min, 9°.44 |
| DSCS III F- 8 (USA 97) |
22915 |
1993-074A |
112.0 W |
2013 Jan 1 |
35769 x 35804 km, 1436.10 min, 8°.11 |
| DSCS III F- 9 (USA 113) |
23628 |
1995-038A |
149.5 E |
2013 Jan 1 |
35783 x 35793 km, 1436.16 min, 7°.78 |
| DSCS III F-10 (USA 135) |
25019 |
1997-065A |
129.7 W |
2012 Sep 9 |
35770 x 35805 km, 1436.12 min, 5°.86 |
| DSCS III F-11 (USA 148) |
26052 |
2000-001A |
103.6 E |
2013 Jan 1 |
35782 x 35793 km, 1436.14 min, 3°.80 |
| DSCS III F-12 (USA 153) |
26575 |
2000-065A |
56.6 E |
2013 Apr 29 |
35767 x 35807 km, 1436.12 min, 3°.27 |
| DSCS III F-13 (USA 167) |
27691 |
2003-008A |
135.4 W |
2013 Apr 5 |
35775 x 35799 km, 1436.12 min, 1°.59 |
| DSCS III F-14 (USA 170) |
27875 |
2003-040A |
52.1 W |
2013 Apr 6 |
35698 x 35876 km, 1436.12 min, 0°.64 |
| DSP F- 7 r/b (OPS 3151 r/b) |
9855 |
1977-007C |
122.8 W |
2011 Sep 30 |
35741 x 35867 km, 1436.98 min, 13°.42 |
| DSP F-16 (USA 75) |
21805 |
1991-080B |
145.4 W |
2012 Dec 22 |
35739 x 35836 km, 1436.12 min, 13°.66 |
| DSP F-17 (USA 107) |
23435 |
1994-084A |
49.6 W |
2013 Feb 23 |
35753 x 35822 km, 1436.12 min, 12°.30 |
| DSP F-20 (USA 130) |
24737 |
1997-008A |
20.9 E |
2013 Apr 29 |
35721 x 35853 km, 1436.12 min, 10°.74 |
| DSP F-20 (USA 149) |
26356 |
2000-024A |
164.8 W |
2013 Jan 1 |
35770 x 35804 km, 1436.12 min, 8°.16 |
| DSP F-21 (USA 159) |
26880 |
2001-033A |
103.4 E |
2013 Jan 1 |
35781 x 35789 km, 1436.01 min, 7°.16 |
| DSP F-22 (USA 176) |
28158 |
2004-004A |
70.0 E |
2013 Apr 29 |
35765 x 35807 km, 1436.08 min, 5°.16 |
| DSP F-23 (USA 197) |
32287 |
2007-054A |
66.7 E |
2012 Sep 7 |
35741 x 35769 km, 1434.48 min, 0°.50 |
| FltSatCom F-3 (OPS 6393) |
11669 |
1980-004A |
50.4 W |
2013 May 12 |
35679 x 35932 km, 1437.06 min, 13°.26 |
| FltSatCom F-7 (USA 20) |
17181 |
1986-096A |
99.5 E |
2013 Jan 1 |
35681 x 35899 km, 1436.27 min, 13°.77 |
| FltSatCom F-8 (USA 46) |
20253 |
1989-077A |
15.4 W |
2013 Apr 29 |
35768 x 35806 km, 1436.12 min, 11°.63 |
| Intruder? or Mentor? (USA 202) |
33490 |
2009-001A |
44.1 E |
2013 May 11 |
35773 x 35801 km, 1436.12 min, 3°.43 |
| Magnum 1 (USA 8) |
15543 |
1985-010B |
80.8 E |
2013 May 15 |
35589 x 35985 km, 1436.12 min, 17°.62 |
| Magnum 2 (USA 48) |
20355 |
1989-090B |
90.7 E |
2013 May 15 |
34648 x 36920 km, 1435.96 min, 16°.73 |
| Mercury 1 (USA 105) |
23223 |
1994-054A |
48.5 E |
2013 May 11 |
35693 x 35882 km, 1436.12 min, 8°.79 |
| Mercury 2 (USA 118) |
23855 |
1996-026A |
42.4 E |
2013 Apr 29 |
33557 x 38015 km, 1436.08 min, 9°.12 |
| Milstar 1 DFS (USA 99) |
22988 |
1994-009A |
38.9 W |
2013 May 8 |
35768 x 35806 km, 1436.12 min, 9°.21 |
| Milstar 2 DFS (USA 115) |
23712 |
1995-060A |
150.0 W |
2013 Apr 13 |
35760 x 35814 km, 1436.12 min, 10°.36 |
| Milstar 4 (USA 157) |
26715 |
2001-009A |
151.9 E |
2013 Jan 1 |
35775 x 35800 km, 1436.15 min, 5°.93 |
| Milstar 5 (USA 164) |
27168 |
2002-001A |
29.8 E |
2013 Apr 29 |
35726 x 35848 km, 1436.12 min, 5°.41 |
| Milstar 5 r/b (USA 164 r/b) |
27169 |
2002-001B |
139.5 W |
2012 Sep 10 |
35579 x 36057 km, 1437.68 min, 3°.41 |
| Milstar 6 (USA 169) |
27711 |
2003-012A |
89.6 W |
2013 May 8 |
35771 x 35803 km, 1436.12 min, 4°.64 |
| Orion 1/Mentor 1 (USA 110) |
23567 |
1995-022A |
127.3 E |
2013 Jan 1 |
35438 x 36135 km, 1436.09 min, 11°.23 |
| Orion 2 (USA 139) |
25336 |
1998-029A |
25.9 W |
2013 Apr 29 |
35657 x 35917 km, 1436.12 min, 8°.89 |
| PAN (USA 207) |
35815 |
2009-047A |
45.0 E |
2013 May 11 |
35763 x 35811 km, 1436.12 min, 0°.12 |
| Rhyolite 1 (OPS 5346) |
4418 |
1970-046A |
64.9 E |
2013 Apr 10 |
35746 x 35828 km, 1436.10 min, 8°.21 |
| Rhyolite 2 (OPS 6063) |
6380 |
1973-013A |
73.5 E |
2013 May 11 |
35663 x 35909 km, 1436.06 min, 10°.41 |
| SBIRS GEO-1 (USA 230) |
37481 |
2011-019A |
93.9 E |
2013 Jan 1 |
35776 x 35798 km, 1436.12 min, 5°.72 |
| SDS-2 F-2 (USA 67) |
20963 |
1990-097B |
75.2 E |
2013 May 11 |
35249 x 36326 km, 1436.14 min, 15°.81 |
| SDS-3 F-1 (USA 155) |
26635 |
2000-080A |
91.9 E |
2013 Jan 1 |
35777 x 35797 km, 1436.11 min, 5°.68 |
| SDS-3 F-2 (USA 162) |
26948 |
2001-046A |
140.9 W |
2013 Apr 14 |
35750 x 35824 km, 1436.12 min, 6°.36 |
| SDS-3 F-6 (USA 236) |
38466 |
2012-033A |
10.0 W |
2013 Apr 29 |
35774 x 35800 km, 1436.12 min, 4°.31 |
| UFO F- 2 (USA 95) |
22787 |
1993-056A |
29.0 E |
2013 Apr 29 |
35759 x 35815 km, 1436.12 min, 9°.10 |
| UFO F- 3 (USA 104) |
23132 |
1994-035A |
53.0 E |
2012 May 14 |
35751 x 35761 km, 1434.53 min, 8°.38 |
| UFO F- 4 (USA 108) |
23467 |
1995-003A |
99.8 W |
2013 Apr 13 |
35774 x 35805 km, 1436.25 min, 7°.76 |
| UFO F- 6 (USA 114) |
23696 |
1995-057A |
105.3 W |
2013 Mar 7 |
35760 x 35814 km, 1436.12 min, 7°.06 |
| UFO F- 7 (USA 127) |
23967 |
1996-042A |
23.0 W |
2013 Apr 20 |
35758 x 35816 km, 1436.12 min, 6°.31 |
| UFO F- 8 (USA 138) |
25258 |
1998-016A |
171.1 E |
2013 Jan 1 |
35769 x 35806 km, 1436.13 min, 5°.29 |
| UFO F-10 (USA 146) |
25967 |
1999-063A |
72.4 E |
2013 May 15 |
35773 x 35802 km, 1436.12 min, 4°.76 |
| UFO F-11 (USA 174) |
28117 |
2003-057A |
71.7 E |
2013 May 15 |
35769 x 35805 km, 1436.12 min, 3°.34 |
| Vortex 3 (OPS 4029) |
12930 |
1981-107A |
157.6 W |
2012 Oct 21 |
31945 x 39648 km, 1436.58 min, 7°.71 |
| Vortex 4 (OPS 0441) |
14675 |
1984-009A |
42.5 W |
2013 Mar 31 |
31424 x 40185 km, 1437.02 min, 7°.90 |
| WGS F-1 (USA 195) |
32258 |
2007-046A |
174.8 E |
2013 Jan 1 |
35783 x 35791 km, 1436.12 min, 0°.10 |
| WGS F-2 (USA 204) |
34713 |
2009-017A |
60.1 E |
2013 May 8 |
35764 x 35810 km, 1436.12 min, 0°.02 |
| WGS F-3 (USA 211) |
36108 |
2009-068A |
11.9 W |
2013 Apr 29 |
35717 x 35857 km, 1436.12 min, 0°.02 |
| WGS F-4 (USA 233) |
38070 |
2012-003A |
88.5 E |
2013 Apr 21 |
35741 x 35833 km, 1436.12 min, 0°.01 |
For these satellites that do not have formal published elements, thanks go to the radio and visual amateur satellite trackers for observing, and particularly to Mike McCants for archiving the derived orbits. |
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