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Orbits


Tyneside, UK
2025 Feb 11
Tuesday, Day 42

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Primary source of unclassified orbital elements

Orbital elements based on amateur observations
Sun-synchronous Satellites - United States

This a list of satellites in sun-synchronous orbit operated by the USA. Names are not necessarily those by which they are known in the NORAD catalogue used by SpaceTrack.

It is a snapshot and is updated daily. The measure that results in an entry in this table is that the drift rate of LTDN (Local Time at the Descending Node) is no more than twenty four minutes each year. Some satellites may have higher drift rates but they may still be acceptable to their owners/operators. They do not appear here. On the converse, although a satellite is in a sun-synchronous orbit, it is not necessarily active.

Updated: 2025 Feb 10, 04:47 UTC

LTDN Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
12:01USA 326514452022-009A2024 Sep 2498 x 503 km, 94.6 min, 97°.4
18:33AMS 3 (DMSP 5D-1 F-3)108201978-042A2025 Feb 9760 x 774 km, 100.2 min, 98°.5
02:28AMS 4 (DMSP 5D-1 F-4)113891979-050A2025 Feb 9786 x 804 km, 100.8 min, 98°.6
14:23Aprizesat 10400192014-033K2025 Feb 9604 x 719 km, 98.0 min, 97°.9
02:35Aprizesat 7394162013-066A2025 Feb 9573 x 627 km, 96.7 min, 97°.7
02:10Aprizesat 8394252013-066K2025 Feb 9577 x 645 km, 96.9 min, 97°.8
09:39Athena462752020-061D2025 Feb 9461 x 464 km, 93.8 min, 97°.3
02:01Aura (EOS Chem-1)283762004-026A2025 Feb 9692 x 695 km, 98.6 min, 98°.3
10:37Capella 15 (Acadia 5)605442024-149CE2025 Feb 9585 x 595 km, 96.5 min, 97°.7
09:29Cesium 1A492612021-088B2025 Feb 9495 x 519 km, 94.8 min, 97°.4
09:34Cesium 1B492622021-088C2025 Feb 9495 x 515 km, 94.7 min, 97°.5
05:48COBE203221989-089A2025 Feb 9869 x 882 km, 102.5 min, 98°.9
06:00Coriolis276402003-001A2025 Feb 9816 x 836 km, 101.4 min, 98°.7
09:34CuPID (Cusp Plasma Imaging Detector)492642021-088E2025 Feb 9506 x 526 km, 94.9 min, 97°.5
16:01DMSP 4A F-7 (Defense Meteorological Satellite Program)24181966-082A2025 Feb 9664 x 831 km, 99.8 min, 98°.3
20:09DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2025 Feb 9815 x 869 km, 101.8 min, 98°.6
13:55DMSP 5A F-2 (Defense Meteorological Satellite Program)35101968-092A2025 Feb 9777 x 819 km, 100.8 min, 98°.5
20:22DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2025 Feb 9763 x 825 km, 100.7 min, 98°.5
16:54DMSP 5B F-3 (Defense Meteorological Satellite Program)62751972-089A2025 Feb 9769 x 818 km, 100.7 min, 98°.5
20:26DMSP 5B F-4 (Defense Meteorological Satellite Program)67871973-054A2025 Feb 9762 x 800 km, 100.5 min, 98°.6
19:10DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2025 Feb 9765 x 824 km, 100.8 min, 98°.6
19:18DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2025 Feb 9771 x 846 km, 101.1 min, 98°.7
07:33USA 73 (DMSP 5D-2 F-11)217981991-082A2025 Feb 9826 x 843 km, 101.6 min, 98°.7
06:16USA 109 (DMSP 5D-2 F-13)235331995-015A2025 Feb 9831 x 842 km, 101.6 min, 98°.8
08:40USA 131 (DMSP 5D-2 F-14)247531997-012A2025 Feb 9830 x 844 km, 101.7 min, 98°.8
17:57DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2025 Feb 9786 x 796 km, 100.7 min, 98°.6
17:54USA 26 (DMSP 5D-2 F-8)181231987-053A2025 Feb 9818 x 837 km, 101.5 min, 98°.7
09:08USA 106 (DMSP 5D-2 S-12)232331994-057A2025 Feb 9832 x 846 km, 101.7 min, 98°.7
06:09USA 191 (DMSP 5D-3 F-17)295222006-050A2025 Feb 9836 x 851 km, 101.8 min, 98°.7
03:57USA 210 (DMSP 5D-3 F-18)359512009-057A2025 Feb 9836 x 852 km, 101.8 min, 98°.8
05:35USA 249 (DMSP 5D-3 F-19)396302014-015A2025 Feb 9836 x 851 km, 101.8 min, 98°.8
02:32EO-1266192000-075A2025 Feb 9662 x 673 km, 98.1 min, 98°.1
23:47ESSA 220911966-016A2025 Feb 91354 x 1414 km, 113.4 min, 101°.3
02:03ESSA 836151968-114A2025 Feb 91414 x 1463 km, 114.6 min, 101°.6
05:03GAzelle540232022-127A2025 Feb 9742 x 759 km, 99.8 min, 98°.4
10:23Geoeye 1333312008-042A2025 Feb 9676 x 682 km, 98.3 min, 98°.1
10:42GNOMES 3 (GNSS Navigation and Occultation Measurement Satellite)521582022-033B2025 Feb 9614 x 632 km, 97.2 min, 97°.9
10:37Hawk 10A605402024-149CA2025 Feb 9584 x 587 km, 96.4 min, 97°.7
10:37Hawk 10B605452024-149CF2025 Feb 9583 x 589 km, 96.4 min, 97°.7
10:36Hawk 10C605752024-149DM2025 Feb 9584 x 587 km, 96.4 min, 97°.7
22:12Hawk 7A561912023-054P2025 Feb 9485 x 497 km, 94.4 min, 97°.3
22:05Hawk 7B561932023-054R2025 Feb 9485 x 498 km, 94.4 min, 97°.3
22:09Hawk 7C562002023-054Y2025 Feb 9485 x 497 km, 94.4 min, 97°.3
09:52ION SCV-001 (Lucas)462742020-061C2025 Feb 9435 x 438 km, 93.3 min, 97°.3
09:30ION SCV-004 (Elysian Eleonora)509932022-002K2025 Feb 9490 x 500 km, 94.5 min, 97°.4
09:47ION SCV-007 (Glorious Gratia)550602023-001BD2025 Feb 9630 x 649 km, 97.5 min, 98°.0
22:06ION SCV-010 (Masterful Matthaeus)561922023-054Q2025 Feb 9493 x 518 km, 94.7 min, 97°.4
17:26IRAS137771983-004A2025 Feb 9878 x 904 km, 102.8 min, 99°.0
18:25IRIS (Interface Region Imaging Spectrometer)391972013-033A2025 Feb 9599 x 635 km, 97.0 min, 98°.0
08:14USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2025 Jan 25378 x 391 km, 92.2 min, 97°.1
14:38USA 224 (KH- 11 Block-4 F2?/Crystal)373482011-002A2024 Sep 18262 x 967 km, 97.0 min, 97°.9
09:42USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2024 Sep 18267 x 1026 km, 97.7 min, 97°.9
13:01USA 314 (KH-11 Block-5 F-2/Crystal)482472021-032A2024 Aug 31545 x 770 km, 97.9 min, 98°.0
02:44Landsat 276151975-004A2025 Feb 9899 x 910 km, 103.1 min, 99°.0
02:38Landsat 3107021978-026A2025 Feb 9893 x 916 km, 103.1 min, 99°.0
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2025 Feb 9702 x 703 km, 98.8 min, 98°.2
10:12Landsat 9492602021-088A2025 Feb 9702 x 703 km, 98.8 min, 98°.2
09:22Lynk Tower 3550462023-001AP2025 Feb 9485 x 501 km, 94.5 min, 97°.4
09:21Lynk Tower 4550342023-001AB2025 Feb 9487 x 503 km, 94.5 min, 97°.4
01:24MSX238511996-024A2025 Feb 9894 x 906 km, 103.0 min, 99°.0
22:14Nimbus 3 (Nimbus B2)38901969-037A2025 Feb 91069 x 1130 km, 107.3 min, 99°.8
00:06Nimbus 4 (Nimbus D)43621970-025A2025 Feb 91086 x 1098 km, 107.1 min, 100°.0
23:04Nimbus 5 (Nimbus E)63051972-097A2025 Feb 91088 x 1099 km, 107.1 min, 99°.8
23:34Nimbus 6 (Nimbus F)79241975-052A2025 Feb 91101 x 1112 km, 107.4 min, 100°.0
03:59NOAA 5 (ITOS H)90571976-077A2025 Feb 91508 x 1523 km, 116.3 min, 102°.2
07:09NOAA 6114161979-057A2025 Feb 9769 x 781 km, 100.3 min, 98°.6
09:43NOAA 7125531981-059A2025 Feb 9826 x 841 km, 101.6 min, 98°.9
04:42NOAA 10169691986-073A2025 Feb 9787 x 804 km, 100.8 min, 98°.7
04:50NOAA 12212631991-032A2025 Feb 9793 x 814 km, 100.9 min, 98°.6
07:14NOAA 15253381998-030A2025 Feb 9795 x 809 km, 100.9 min, 98°.5
10:45NOAA 18286542005-018A2025 Feb 9836 x 858 km, 101.9 min, 98°.9
01:23NOAA 20 (JPSS, Joint Polar Satellite System 1)430132017-073A2025 Feb 9827 x 827 km, 101.4 min, 98°.7
01:25NOAA 21 (Joint Polar Satellite System 2)542342022-150A2025 Feb 9825 x 828 km, 101.4 min, 98°.7
18:56North Star 1 (Lemur 2, Nimbus 2000)588992024-022A2025 Feb 9486 x 506 km, 94.5 min, 97°.5
18:57North Star 2 (Lemur 2, Valhalla)589002024-022B2025 Feb 9486 x 506 km, 94.5 min, 97°.5
18:58North Star 4 (Lemur 2, Cael)589032024-022E2025 Feb 9486 x 502 km, 94.5 min, 97°.5
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2025 Feb 9701 x 704 km, 98.8 min, 98°.2
09:59Orbcomm-X (Orbcomm-X)215761991-050C2025 Feb 9746 x 751 km, 99.8 min, 98°.4
15:31PREFIRE 1 (Polar Radiant Energy in the Far InfraRed Experiment)599652024-108A2025 Feb 9507 x 525 km, 94.9 min, 97°.5
19:59PREFIRE 2 (Polar Radiant Energy in the Far InfraRed Experiment)598812024-099A2025 Feb 9508 x 528 km, 95.0 min, 97°.5
06:03QuakeSat278452003-031F2025 Feb 9805 x 817 km, 101.1 min, 98°.7
21:28QuikScat257891999-034A2025 Feb 9653 x 791 km, 99.2 min, 98°.3
09:19Skysat 1394182013-066C2025 Feb 9525 x 556 km, 95.5 min, 97°.5
09:01Skysat 7 (Skysat C5)417722016-058C2025 Feb 9446 x 463 km, 93.7 min, 97°.1
14:10Skysat 8 (Skysat C6)429922017-068F2025 Feb 9469 x 482 km, 94.1 min, 97°.4
14:06Skysat 9 (Skysat C7)429912017-068E2025 Feb 9468 x 476 km, 94.0 min, 97°.4
14:02Skysat 10 (Skysat C8)429902017-068D2025 Feb 9474 x 477 km, 94.1 min, 97°.4
14:00Skysat 11 (Skysat C9)429892017-068C2025 Feb 9458 x 470 km, 93.9 min, 97°.4
14:06Skysat 12 (Skysat C10)429882017-068B2025 Feb 9466 x 476 km, 94.0 min, 97°.4
05:58SMAP (Soil Moisture Active Passive)403762015-003A2025 Feb 9681 x 684 km, 98.4 min, 98°.1
10:57Spark 1 (LEO 1)521572022-033A2025 Feb 9626 x 635 km, 97.3 min, 97°.9
13:50Starlink 3004488802021-059B2025 Feb 9562 x 564 km, 95.9 min, 97°.7
13:50Starlink 3005488812021-059C2025 Feb 9563 x 563 km, 95.9 min, 97°.7
17:36Starlink 4362530432022-077A2025 Feb 9562 x 564 km, 95.9 min, 97°.7
09:36Starlink 4391531892022-084A2025 Feb 9561 x 565 km, 95.9 min, 97°.7
13:36Starlink 4415534652022-099A2025 Feb 9562 x 564 km, 95.9 min, 97°.7
21:36Starlink 4622536482022-105A2025 Feb 9561 x 565 km, 95.9 min, 97°.7
05:36Starlink 6038563172023-058A2025 Feb 9562 x 564 km, 95.9 min, 97°.7
09:14STPSat-5437622018-099E2025 Feb 9541 x 545 km, 95.5 min, 97°.5
12:06USA 205 (STSS-ATRR)349032009-023A2023 Sep 11864 x 877 km, 102.4 min, 98°.9
01:25Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2025 Feb 9827 x 827 km, 101.4 min, 98°.7
09:31Terra (EOS AM-1)259941999-068A2025 Feb 9690 x 693 km, 98.6 min, 98°.0
13:14TIROS 1014301965-051A2025 Feb 9714 x 795 km, 99.9 min, 98°.5
23:43TOPO 143631970-025B2025 Feb 91083 x 1086 km, 106.9 min, 99°.9
09:13Umbra 05550362023-001AD2025 Feb 9485 x 492 km, 94.4 min, 97°.4
10:25Umbra 08582922023-174AN2025 Feb 9496 x 498 km, 94.5 min, 97°.4
10:40Umbra 09605412024-149CB2025 Feb 9563 x 567 km, 96.0 min, 97°.7
10:40Umbra 10605472024-149CH2025 Feb 9565 x 567 km, 96.0 min, 97°.7
23:18Un-named satellite617932024-201B2025 Feb 9609 x 621 km, 97.0 min, 97°.9
09:27Vigoride 5550562023-001AZ2025 Feb 9468 x 483 km, 94.1 min, 97°.4
06:01Weather System Follow-on - Microwave 1 (WSF-M 1)594812024-070A2025 Feb 9820 x 826 km, 101.4 min, 98°.7
13:30WorldView 1320602007-041A2025 Feb 9489 x 495 km, 94.4 min, 97°.4
10:24WorldView 2359462009-055A2025 Feb 9766 x 770 km, 100.2 min, 98°.5
10:26Worldview 3401152014-048A2025 Feb 9609 x 618 km, 97.0 min, 97°.9
10:28Worldview Legion 1596252024-081A2025 Feb 9512 x 518 km, 94.9 min, 97°.5
10:29Worldview Legion 2596262024-081B2025 Feb 9516 x 517 km, 94.9 min, 97°.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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