Orbital Focus - International Spaceflight Facts and Figures
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Orbits


Tyneside, UK
2025 May 16
Friday, Day 136

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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 May 16, 04:48 UTC

LTDN Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
12:01USA 326514452022-009A2024 Sep 2498 x 503 km, 94.6 min, 97°.4
18:32AMS 3 (DMSP 5D-1 F-3)108201978-042A2025 May 15759 x 774 km, 100.2 min, 98°.5
02:27AMS 4 (DMSP 5D-1 F-4)113891979-050A2025 May 15787 x 802 km, 100.8 min, 98°.6
14:17Aprizesat 10400192014-033K2025 May 15603 x 718 km, 97.9 min, 97°.9
02:31Aprizesat 7394162013-066A2025 May 15571 x 625 km, 96.6 min, 97°.7
02:06Aprizesat 8394252013-066K2025 May 15576 x 643 km, 96.9 min, 97°.8
14:46Aprizesat 9400182014-033J2025 May 15602 x 698 km, 97.7 min, 97°.9
09:39Athena462752020-061D2025 May 15451 x 454 km, 93.6 min, 97°.2
02:07Aura (EOS Chem-1)283762004-026A2025 May 15691 x 693 km, 98.6 min, 98°.3
10:35Capella 15 (Acadia 5)605442024-149CE2025 May 15587 x 593 km, 96.5 min, 97°.7
09:30Cesium 1A492612021-088B2025 May 14485 x 508 km, 94.6 min, 97°.4
09:36Cesium 1B492622021-088C2025 May 14485 x 504 km, 94.5 min, 97°.4
05:46COBE203221989-089A2025 May 15868 x 882 km, 102.5 min, 98°.9
06:00Coriolis276402003-001A2025 May 14817 x 835 km, 101.4 min, 98°.7
09:34CuPID (Cusp Plasma Imaging Detector)492642021-088E2025 May 15499 x 519 km, 94.8 min, 97°.4
15:57DMSP 4A F-7 (Defense Meteorological Satellite Program)24181966-082A2025 May 15664 x 830 km, 99.8 min, 98°.3
20:02DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2025 May 15813 x 870 km, 101.8 min, 98°.6
13:51DMSP 5A F-2 (Defense Meteorological Satellite Program)35101968-092A2025 May 15776 x 820 km, 100.8 min, 98°.5
20:17DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2025 May 15762 x 825 km, 100.7 min, 98°.5
20:31DMSP 5A F-6 (Defense Meteorological Satellite Program)49531971-012A2025 May 15726 x 779 km, 99.9 min, 98°.5
16:50DMSP 5B F-3 (Defense Meteorological Satellite Program)62751972-089A2025 May 15767 x 819 km, 100.7 min, 98°.5
20:30DMSP 5B F-4 (Defense Meteorological Satellite Program)67871973-054A2025 May 15761 x 799 km, 100.5 min, 98°.6
19:09DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2025 May 15764 x 824 km, 100.7 min, 98°.5
19:18DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2025 May 15772 x 845 km, 101.1 min, 98°.6
07:32USA 73 (DMSP 5D-2 F-11)217981991-082A2025 May 15826 x 843 km, 101.6 min, 98°.7
06:18USA 109 (DMSP 5D-2 F-13)235331995-015A2025 May 15831 x 840 km, 101.6 min, 98°.8
08:42USA 131 (DMSP 5D-2 F-14)247531997-012A2025 May 15830 x 844 km, 101.7 min, 98°.8
17:58DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2025 May 15785 x 797 km, 100.7 min, 98°.6
17:54USA 26 (DMSP 5D-2 F-8)181231987-053A2025 May 15819 x 836 km, 101.4 min, 98°.7
09:06USA 106 (DMSP 5D-2 S-12)232331994-057A2025 May 15831 x 846 km, 101.7 min, 98°.7
06:07USA 191 (DMSP 5D-3 F-17)295222006-050A2025 May 15835 x 851 km, 101.8 min, 98°.7
03:59USA 210 (DMSP 5D-3 F-18)359512009-057A2025 May 15836 x 851 km, 101.8 min, 98°.9
05:34USA 249 (DMSP 5D-3 F-19)396302014-015A2025 May 15836 x 850 km, 101.8 min, 98°.8
02:32EO-1266192000-075A2025 May 15661 x 672 km, 98.1 min, 98°.1
23:43ESSA 220911966-016A2025 May 151354 x 1414 km, 113.4 min, 101°.2
03:39ESSA 733451968-069A2025 May 151431 x 1473 km, 114.9 min, 101°.5
02:03ESSA 836151968-114A2025 May 151413 x 1464 km, 114.6 min, 101°.6
05:02GAzelle540232022-127A2025 May 15742 x 759 km, 99.8 min, 98°.4
10:24Geoeye 1333312008-042A2025 May 15676 x 681 km, 98.3 min, 98°.1
10:40GNOMES 3 (GNSS Navigation and Occultation Measurement Satellite)521582022-033B2025 May 15612 x 628 km, 97.1 min, 97°.9
10:37Hawk 10A605402024-149CA2025 May 15581 x 585 km, 96.3 min, 97°.7
10:36Hawk 10B605452024-149CF2025 May 15580 x 587 km, 96.3 min, 97°.7
10:35Hawk 10C605752024-149DM2025 May 15582 x 585 km, 96.3 min, 97°.7
22:10Hawk 7A561912023-054P2025 May 15478 x 490 km, 94.3 min, 97°.3
22:03Hawk 7B561932023-054R2025 May 15477 x 491 km, 94.3 min, 97°.3
22:07Hawk 7C562002023-054Y2025 May 15478 x 490 km, 94.3 min, 97°.3
09:28ION SCV-004 (Elysian Eleonora)509932022-002K2025 May 15485 x 494 km, 94.4 min, 97°.3
09:47ION SCV-007 (Glorious Gratia)550602023-001BD2025 May 15630 x 648 km, 97.5 min, 98°.0
22:07ION SCV-010 (Masterful Matthaeus)561922023-054Q2025 May 15491 x 512 km, 94.7 min, 97°.4
17:28IRAS137771983-004A2025 May 15876 x 905 km, 102.8 min, 99°.1
18:29IRIS (Interface Region Imaging Spectrometer)391972013-033A2025 May 15598 x 633 km, 97.0 min, 98°.0
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)392322013-043A2025 May 14264 x 982 km, 97.2 min, 97°.9
13:06USA 314 (KH-11 Block-5 F-2/Crystal)482472021-032A2025 May 13549 x 764 km, 97.9 min, 98°.1
02:40Landsat 276151975-004A2025 May 15899 x 910 km, 103.1 min, 99°.0
02:35Landsat 3107021978-026A2025 May 15893 x 915 km, 103.1 min, 99°.0
10:11Landsat 8 (Landsat Data Continuity Mission)390842013-008A2025 May 15702 x 703 km, 98.8 min, 98°.2
10:11Landsat 9492602021-088A2025 May 15702 x 703 km, 98.8 min, 98°.2
09:23Lynk Tower 3550462023-001AP2025 May 14478 x 494 km, 94.3 min, 97°.4
09:21Lynk Tower 4550342023-001AB2025 May 15479 x 495 km, 94.4 min, 97°.4
01:22MSX238511996-024A2025 May 15895 x 904 km, 103.0 min, 99°.0
00:08Nimbus 4 (Nimbus D)43621970-025A2025 May 151087 x 1097 km, 107.1 min, 100°.0
23:01Nimbus 5 (Nimbus E)63051972-097A2025 May 151087 x 1100 km, 107.1 min, 99°.8
23:35Nimbus 6 (Nimbus F)79241975-052A2025 May 151100 x 1113 km, 107.4 min, 100°.0
07:14NOAA 6114161979-057A2025 May 15767 x 782 km, 100.3 min, 98°.6
09:47NOAA 7125531981-059A2025 May 15825 x 841 km, 101.6 min, 98°.8
04:46NOAA 10169691986-073A2025 May 15786 x 805 km, 100.8 min, 98°.7
04:49NOAA 12212631991-032A2025 May 15793 x 814 km, 100.9 min, 98°.6
02:15NOAA 13227391993-050A2025 May 15841 x 854 km, 101.9 min, 98°.7
07:11NOAA 15253381998-030A2025 May 15794 x 810 km, 100.9 min, 98°.5
10:47NOAA 18286542005-018A2025 May 15837 x 857 km, 101.9 min, 98°.8
01:23NOAA 20 (JPSS, Joint Polar Satellite System 1)430132017-073A2025 May 15826 x 828 km, 101.4 min, 98°.7
01:25NOAA 21 (Joint Polar Satellite System 2)542342022-150A2025 May 15826 x 827 km, 101.4 min, 98°.7
19:00North Star 1 (Lemur 2, Nimbus 2000)588992024-022A2025 May 15476 x 495 km, 94.3 min, 97°.5
19:01North Star 2 (Lemur 2, Valhalla)589002024-022B2025 May 15475 x 495 km, 94.3 min, 97°.5
19:02North Star 4 (Lemur 2, Cael)589032024-022E2025 May 14475 x 491 km, 94.3 min, 97°.4
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2025 May 15701 x 703 km, 98.8 min, 98°.2
09:57Orbcomm-X (Orbcomm-X)215761991-050C2025 May 15746 x 750 km, 99.8 min, 98°.3
15:32PREFIRE 1 (Polar Radiant Energy in the Far InfraRed Experiment)599652024-108A2025 May 15501 x 519 km, 94.8 min, 97°.5
19:58PREFIRE 2 (Polar Radiant Energy in the Far InfraRed Experiment)598812024-099A2025 May 15504 x 524 km, 94.9 min, 97°.5
17:58PUNCH Narrow Field Imager (Polarimeter to Unify the Corona and Heliosphere)631782025-047A2025 May 15640 x 656 km, 97.7 min, 98°.0
17:58PUNCH Wide Field Imager 1 (Polarimeter to Unify the Corona and Heliosphere)631792025-047B2025 May 14641 x 656 km, 97.7 min, 98°.0
17:58PUNCH Wide Field Imager 2 (Polarimeter to Unify the Corona and Heliosphere)631812025-047D2025 May 15644 x 658 km, 97.7 min, 98°.0
17:58PUNCH Wide Field Imager 3 (Polarimeter to Unify the Corona and Heliosphere)631802025-047C2025 May 15642 x 657 km, 97.7 min, 98°.0
06:03QuakeSat278452003-031F2025 May 15805 x 816 km, 101.1 min, 98°.7
21:30QuikScat257891999-034A2025 May 15652 x 790 km, 99.2 min, 98°.3
09:14Skysat 1394182013-066C2025 May 15522 x 551 km, 95.4 min, 97°.4
14:14Skysat 8 (Skysat C6)429922017-068F2025 May 15472 x 479 km, 94.1 min, 97°.4
14:11Skysat 9 (Skysat C7)429912017-068E2025 May 15466 x 474 km, 94.0 min, 97°.4
14:07Skysat 10 (Skysat C8)429902017-068D2025 May 15470 x 473 km, 94.0 min, 97°.4
14:11Skysat 12 (Skysat C10)429882017-068B2025 May 15469 x 474 km, 94.0 min, 97°.4
08:40SkySat 15 (Skysat C13)438022018-099AW2025 May 14413 x 421 km, 92.9 min, 97°.0
05:58SMAP (Soil Moisture Active Passive)403762015-003A2025 May 15681 x 683 km, 98.4 min, 98°.1
10:55Spark 1 (LEO 1)521572022-033A2025 May 15623 x 632 km, 97.3 min, 97°.9
17:58SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer)631822025-047E2025 May 15644 x 660 km, 97.8 min, 98°.0
13:50Starlink 3004488802021-059B2025 May 15562 x 564 km, 95.9 min, 97°.7
13:50Starlink 3005488812021-059C2025 May 15562 x 564 km, 95.9 min, 97°.7
17:36Starlink 4362530432022-077A2025 May 15560 x 566 km, 95.9 min, 97°.7
09:36Starlink 4391531892022-084A2025 May 15555 x 563 km, 95.8 min, 97°.7
13:36Starlink 4415534652022-099A2025 May 15562 x 564 km, 95.9 min, 97°.7
21:36Starlink 4622536482022-105A2025 May 15562 x 564 km, 95.9 min, 97°.7
05:36Starlink 6038563172023-058A2025 May 15560 x 566 km, 95.9 min, 97°.7
09:10STPSat-5437622018-099E2025 May 15537 x 539 km, 95.4 min, 97°.5
01:26Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2025 May 15825 x 829 km, 101.4 min, 98°.8
13:16TIROS 1014301965-051A2025 May 15714 x 793 km, 99.9 min, 98°.5
23:44TOPO 143631970-025B2025 May 151084 x 1085 km, 106.9 min, 99°.9
10:29Umbra 08582922023-174AN2025 May 15469 x 470 km, 94.0 min, 97°.4
10:45Umbra 09605412024-149CB2025 May 15552 x 554 km, 95.7 min, 97°.7
10:45Umbra 10605472024-149CH2025 May 14552 x 554 km, 95.7 min, 97°.7
09:32Vigoride 5550562023-001AZ2025 May 15453 x 468 km, 93.8 min, 97°.4
06:01Weather System Follow-on - Microwave 1 (WSF-M 1)594812024-070A2025 May 15819 x 827 km, 101.4 min, 98°.7
13:30WorldView 1320602007-041A2025 May 15492 x 495 km, 94.5 min, 97°.4
10:24WorldView 2359462009-055A2025 May 15765 x 770 km, 100.2 min, 98°.5
10:27Worldview 3401152014-048A2025 May 15609 x 617 km, 97.0 min, 97°.9
10:32Worldview Legion 1596252024-081A2025 May 15510 x 519 km, 94.9 min, 97°.5
10:32Worldview Legion 2596262024-081B2025 May 15515 x 519 km, 95.0 min, 97°.5

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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