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Orbits


Tyneside, UK
2025 May 23
Friday, Day 143

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Geosynchronous Satellites - By Age

This a list of satellites in geosynchronous orbit shown in the order in which they were launched.

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 giving the appearance of an intentionally geosynchronous orbit. This includes a number of spent rocket bodies.

Updated: 2025 May 19, 04:47 UTC

Longi-
tude (°)
Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
64.8 EOPS 5346 (Rhyolite 1)44181970-046A2021 Jun 135746 x 35832 km, 1436.2 min, 2°.5
10.4 EOPS 4966 (Canyon 6, AFP-827 6)79631975-055A2020 Jan 1930029 x 41530 km, 1435.7 min, 16°.2
25.8 WOPS 4258 (Aquacade 3)105081977-114A2025 Feb 1835701 x 35884 km, 1436.4 min, 11°.3
16.7 WEkran (Ekran № 19L)118901980-060A2020 May 2935739 x 35831 km, 1436.0 min, 10°.7
83.7 EUSA 37 (Chalet 6)199761989-035A2022 Aug 2331806 x 39768 km, 1436.1 min, 7°.8
40.8 EUSA 105 (Mercury 1)232231994-054A2025 Apr 335665 x 35909 km, 1436.1 min, 13°.1
126.4 EUSA 110 (Mentor 1, Advanced Orion 1)235671995-022A2021 Jan 1735652 x 35922 km, 1436.1 min, 15°.1
51.3 EUSA 118 (Mercury 2)238551996-026A2025 Apr 334376 x 37198 km, 1436.1 min, 8°.1
26.5 WUSA 139 (Mentor 2, Advanced Orion 2)253361998-029A2025 Apr 335623 x 35951 km, 1436.1 min, 7°.4
110.1 EUSA 155 (SDS-3 F-1)266352000-080A2021 Jan 1335726 x 35847 km, 1436.1 min, 9°.3
127.1 WUSA 162 (SDS-3 F-2)269482001-046A2024 Apr 3035772 x 35802 km, 1436.1 min, 12°.9
67.7 EUSA 171 (Mentor 3, Advanced Orion 3)279372003-041A2022 Sep 2035617 x 35958 km, 1436.1 min, 12°.7
44.0 EUSA 202 (Mentor 4, Advanced Orion 4)334902009-001A2025 Apr 335726 x 35849 km, 1436.1 min, 8°.1
11.7 ESicral 1B348102009-020A2025 Apr 335773 x 35802 km, 1436.1 min, 2°.1
21.1 EUSA 207 (PAN)358152009-047A2025 Apr 335734 x 35844 km, 1436.2 min, 0°.1
95.5 EUSA 223 (Mentor 5, Advanced Orion 5)372322010-063A2021 Sep 735643 x 35931 km, 1436.1 min, 5°.1
23.8 WUSA 236 (SDS-3 F-6)384662012-033A2025 Feb 1835765 x 35809 km, 1436.1 min, 6°.7
51.1 EUSA 237 (Mentor 6, Advanced Orion 6)385282012-034A2025 Feb 1835651 x 35923 km, 1436.1 min, 6°.2
82.1 EUSA 250 (SIGINT?)396522014-020A2022 Sep 2135755 x 35819 km, 1436.1 min, 2°.2
170.0 EUSA 252 (SDS [-3 F-7?] )397512014-027A2020 Jun 1735771 x 35803 km, 1436.1 min, 2°.7
128.6 EUSA 257 (CLIO)402082014-055A2020 Jun 2835721 x 35847 km, 1436.0 min, 0°.1
37.0 ESicral 2406142015-022B2025 Feb 1835773 x 35802 km, 1436.1 min, 0°.0
105.5 EUSA 268 (Mentor 8, Advanced Orion 7)415842016-036A2021 Sep 735580 x 35995 km, 1436.1 min, 6°.3
10.0 WUSA 269 (SDS [-3 F-8?])417242016-047A2025 Apr 335766 x 35808 km, 1436.1 min, 3°.2
93.0 EKirameki 2 (DSN 2)419402017-005A2020 Sep 1535770 x 35804 km, 1436.1 min, 0°.0
92.1 EUSA 279 (SDS-4 F1?)429492017-066A2021 Sep 635771 x 35804 km, 1436.1 min, 2°.8
21.5 ESES 16 (GovSat 1)431782018-013A2025 Apr 335770 x 35804 km, 1436.1 min, 0°.0
55.7 EUSA 311 (Mentor 8, Advanced Orion 8)472372019-095A2025 Feb 1835610 x 35964 km, 1436.1 min, 4°.4
100.1 EUSA 353 (Mentor 10, Advanced Orion 10)594532024-067A2024 Jul 2235557 x 36018 km, 1436.1 min, 7°.6

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.

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