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Orbits


Tyneside, UK
2021 Oct 17
Sunday, Day 290

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Geosynchronous Satellites - US Government and Military

This a list of satellites mainly in the series of named 'USA xxx' or carrying the predecessor 'OPS' designations. It is in order of geographical location round the equator.

This page is a snapshot and is updated frequently. 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 operational or under control at its location. Some older, non-working, satellites have drifted to 'wells' in the Earth's gravitational field and oscillate around that location.


Longi-
tude (°)
Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
9.6 westUSA 104 (UFO F-3)231321994-035A2021 Oct 1635779 x 35791 km, 1436.0 min, 11°.7
10.0 westUSA 269 (SDS [-3 F-8?])417242016-047A2021 May 735770 x 35805 km, 1436.1 min, 2°.7
12.0 westUSA 275 (Wideband Global SATCOM 9)420752017-016A2021 Oct 1635785 x 35790 km, 1436.1 min, 0°.0
15.5 westMUOS 3 (Mobile User Objective System 3)403742015-002A2021 Oct 1635536 x 36036 km, 1436.1 min, 2°.5
22.3 westUSA 146 (UFO F-10)259671999-063A2021 Oct 1635769 x 35806 km, 1436.1 min, 8°.4
23.9 westUSA 236 (SDS-3 F-6)384662012-033A2021 May 735773 x 35801 km, 1436.1 min, 3°.2
24.2 westOPS 4258 (Aquacade 3)105081977-114A2020 Sep 2235719 x 35864 km, 1436.3 min, 15°.2
24.2 westUSA 127 (UFO F-7)239671996-042A2021 Oct 1635756 x 35824 km, 1436.3 min, 9°.6
25.9 westOPS 0441 (Vortex 4)146751984-009A2021 May 731563 x 40033 km, 1436.7 min, 6°.3
26.7 westUSA 139 (Mentor 2/Advanced Orion 2)253361998-029A2021 May 735636 x 35939 km, 1436.1 min, 8°.2
41.1 westOPS 6393 (FltSatCom F-3)116691980-004A2021 Oct 1535693 x 35909 km, 1436.8 min, 9°.7
42.5 westUSA 170 (DSCS III F-14)278752003-040A2021 Oct 1635768 x 35808 km, 1436.2 min, 6°.9
49.0 westUSA 159 (DSP F-21)268802001-033A2021 Oct 1635779 x 35795 km, 1436.1 min, 11°.2
49.6 westOPS 4029 (Vortex 3)129301981-107A2021 May 732111 x 39487 km, 1436.7 min, 6°.6
52.4 westUSA 243 (Wideband Global SATCOM 5)391682013-024A2021 Oct 1635785 x 35788 km, 1436.1 min, 0°.0
67.5 westUSA 288 (AEHF 4)436512018-079A2021 Oct 1635774 x 35800 km, 1436.1 min, 2°.9
89.9 westUSA 99 (Milstar 1 DFS)229881994-009A2021 Oct 1635771 x 35802 km, 1436.1 min, 15°.0
96.6 westUSA 107 (DSP F-17)234351994-084A2021 Oct 1635778 x 35793 km, 1436.0 min, 14°.6
100.0 westMUOS 1 (Mobile User Objective System 1)380932012-009A2021 Oct 1635573 x 36000 km, 1436.1 min, 2°.7
103.3 westOPS 9431 (DSCS II A-1)55871971-095A2021 Oct 1635774 x 35805 km, 1436.3 min, 5°.9
105.0 westMUOS 5 (Mobile User Objective System 5)416222016-041A2021 Oct 1634929 x 36644 km, 1436.1 min, 6°.2
112.3 westUSA 135 (DSCS III F-10)250191997-065A2021 Oct 1635783 x 35792 km, 1436.1 min, 10°.8
120.0 westUSA 115 (Milstar 2 DFS)237121995-060A2021 Oct 1635772 x 35800 km, 1436.1 min, 13°.4
121.9 westUSA 211 (Wideband Global SATCOM 3)361082009-068A2021 Oct 1635779 x 35797 km, 1436.2 min, 0°.0
124.2 westUSA 157 (Milstar 4)267152001-009A2021 Oct 1635773 x 35798 km, 1436.0 min, 9°.8
130.0 westUSA 167 (DSCS III F-13)276912003-008A2021 Oct 1635776 x 35795 km, 1436.0 min, 7°.6
135.2 westUSA 244 (Wideband Global SATCOM 6)392222013-041A2021 Oct 1635785 x 35788 km, 1436.1 min, 0°.0
141.1 westUSA 227 (SDS-3 F-5)373772011-011A2020 Nov 2135771 x 35803 km, 1436.1 min, 4°.6
155.0 westUSA 246 (AEHF 3)392562013-050A2021 Oct 1635549 x 36027 km, 1436.2 min, 1°.1
159.4 westUSA 273 (SBIRS GEO 3)419372017-004A2021 Oct 1635775 x 35797 km, 1436.1 min, 2°.8
165.1 westUSA 149 (DSP F-20)263562000-024A2021 Oct 1635780 x 35800 km, 1436.3 min, 11°.9
177.0 westMUOS 2 (Mobile User Objective System 2)392062013-036A2021 Oct 1635547 x 36027 km, 1436.1 min, 2°.6
179.6 westUSA 148 (DSCS III F-11)260522000-001A2021 Oct 1635779 x 35792 km, 1436.0 min, 9°.2
175.1 eastUSA 263 (Wideband Global SATCOM 7)407462015-036A2021 Oct 1635785 x 35787 km, 1436.1 min, 0°.0
174.9 eastOPS 9432 (DSCS II A-2)55881971-095B2021 Oct 1635781 x 35797 km, 1436.2 min, 5°.9
172.3 eastUSA 108 (UFO F-4)234671995-003A2021 Oct 1535768 x 35805 km, 1436.1 min, 9°.9
171.6 eastUSA 138 (UFO F-8)252581998-016A2021 Oct 1535767 x 35806 km, 1436.1 min, 9°.2
170.0 eastUSA 252 (SDS [-3 F-7?] )397512014-027A2020 Jun 1735771 x 35803 km, 1436.1 min, 2°.7
152.2 eastUSA 169 (Milstar 6)277112003-012A2021 Oct 1635774 x 35799 km, 1436.1 min, 9°.8
149.8 eastUSA 272 (Wideband Global SATCOM 8)418792016-075A2021 Oct 1635787 x 35787 km, 1436.1 min, 0°.0
139.0 eastUSA 282 (SBIRS GEO 4)431622018-009A2021 Oct 1635775 x 35798 km, 1436.1 min, 4°.0
137.8 eastUSA 298 (AEHF 6)454652020-022B2021 Oct 1535584 x 35990 km, 1436.1 min, 6°.5
134.5 eastUSA 153 (DSCS III F-12)265752000-065A2021 Oct 1535782 x 35791 km, 1436.1 min, 8°.7
134.1 eastUSA 283 (Continuous Broadcast Augmenting SATCOM)433392018-036A2021 Oct 1535785 x 35788 km, 1436.1 min, 0°.0
128.6 eastUSA 257 (CLIO)402082014-055A2020 Jun 2835721 x 35847 km, 1436.0 min, 0°.1
126.4 eastUSA 110 (Mentor 1/Advanced Orion 1)235671995-022A2021 Jan 1735652 x 35922 km, 1436.1 min, 15°.1
110.1 eastUSA 155 (SDS-3 F-1)266352000-080A2021 Jan 1335726 x 35847 km, 1436.1 min, 9°.3
105.5 eastUSA 268 (Mentor 7/Advanced Orion 7)415842016-036A2021 Sep 735580 x 35995 km, 1436.1 min, 6°.3
103.7 eastUSA 113 (DSCS III F-9)236281995-038A2021 Oct 1535776 x 35794 km, 1436.0 min, 11°.9
100.0 eastUSA 162 (SDS-3 F-2)269482001-046A2020 Jun 2435778 x 35796 km, 1436.1 min, 10°.9
95.5 eastUSA 223 (Mentor 5/Advanced Orion 5)372322010-063A2021 Sep 735643 x 35931 km, 1436.1 min, 5°.1
92.1 eastUSA 279 (SDS-4 F1?)429492017-066A2021 Sep 635771 x 35804 km, 1436.1 min, 2°.8
88.4 eastUSA 233 (Wideband Global SATCOM 4)380702012-003A2021 Oct 1635785 x 35788 km, 1436.1 min, 0°.0
87.4 eastUSA 176 (DSP F-22)281582004-004A2021 Oct 1535782 x 35791 km, 1436.1 min, 9°.8
82.0 eastUSA 250 (SIGINT?)396522014-020A2021 Sep 335763 x 35811 km, 1436.1 min, 1°.6
81.5 eastUSA 37 (Chalet 6)199761989-035A2020 Jul 131704 x 39870 km, 1436.1 min, 7°.9
75.0 eastMUOS 4 (Mobile User Objective System 4)408872015-044A2021 Oct 1635574 x 35999 km, 1436.1 min, 2°.6
74.5 eastUSA 174 (UFO F-11)281172003-057A2021 Oct 1635780 x 35793 km, 1436.1 min, 6°.7
74.4 eastOPS 6063 (Rhyolite 2)63801973-013A2021 Oct 1635672 x 35900 km, 1436.0 min, 4°.7
71.9 eastUSA 46 (FltSatCom F-8)202531989-077A2021 Oct 1535767 x 35805 km, 1436.1 min, 12°.9
67.8 eastUSA 171 (Mentor 3/Advanced Orion 3)279372003-041A2021 Sep 335621 x 35953 km, 1436.1 min, 12°.1
66.2 eastUSA 230 (SBIRS GEO 1)374812011-019A2021 Oct 1635777 x 35796 km, 1436.1 min, 1°.8
64.8 eastOPS 5346 (Rhyolite 1)44181970-046A2021 Jun 135746 x 35832 km, 1436.2 min, 2°.5
60.4 eastUSA 291 (Wideband Global SATCOM 10)440712019-014A2021 Oct 1635786 x 35788 km, 1436.1 min, 0°.0
57.5 eastUSA 204 (Wideband Global SATCOM 2)347132009-017A2021 Oct 1635786 x 35789 km, 1436.1 min, 0°.0
54.5 eastUSA 292 (AEHF 5)444812019-051A2021 Oct 1635768 x 35805 km, 1436.1 min, 4°.9
52.7 eastUSA 207 (PAN)358152009-047A2021 Sep 835751 x 35818 km, 1436.0 min, 0°.0
52.6 eastUSA 237 (Mentor 6/Advanced Orion 6)385282012-034A2021 Sep 835597 x 35977 km, 1436.1 min, 3°.3
50.7 eastUSA 311 (Mentor 8/Advanced Orion 8)472372019-095A2021 Sep 835575 x 35999 km, 1436.1 min, 7°.4
48.6 eastUSA 118 (Mercury 2)238551996-026A2021 Sep 834247 x 37327 km, 1436.1 min, 8°.8
43.9 eastUSA 202 (Mentor 4/Advanced Orion 4)334902009-001A2021 Jun 235761 x 35813 km, 1436.1 min, 6°.3
42.3 eastUSA 105 (Mercury 1)232231994-054A2021 Jun 235688 x 35886 km, 1436.1 min, 12°.2
28.8 eastUSA 95 (UFO F-2)227871993-056A2021 Oct 1635761 x 35815 km, 1436.1 min, 11°.4
20.7 eastUSA 241 (SBIRS GEO 2)391202013-011A2021 Oct 1635777 x 35796 km, 1436.1 min, 1°.9
18.9 eastUSA 164 (Milstar 5)271682002-001A2021 Oct 1635779 x 35795 km, 1436.1 min, 9°.3
10.4 eastOPS 4966 (Canyon 6)79631975-055A2020 Jan 1930029 x 41530 km, 1435.7 min, 16°.2
7.9 eastUSA 197 (DSP F-23)322872007-054A2021 Jun 735780 x 35800 km, 1436.3 min, 7°.0
6.0 eastUSA 195 (Wideband Global SATCOM 1)322582007-046A2021 Oct 1635783 x 35790 km, 1436.1 min, 0°.0
4.0 eastUSA 214 (AEHF 1)368682010-039A2021 Oct 1635768 x 35807 km, 1436.1 min, 3°.9

For the satellites that do not have formal published elements, thanks go to the radio and visual amateur satellite trackers for their observing, and particularly to Mike McCants for archiving the derived orbits.

Updated: 2021 Oct 17, 01:48 UTC

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