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Orbits


Tyneside, UK
2021 Jul 31
Saturday, Day 212

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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.


LTDN Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
13:40ACRIMSat (Active Cavity Radiometer Irradiance Monitor Satellite)260331999-070B2021 Feb 26665 x 706 km, 98.5 min, 98°.1
18:30AMS 3 (DMSP 5D-1 F-3)108201978-042A2021 Feb 26767 x 781 km, 100.3 min, 98°.5
00:59Amsat Echo (AO-51)283752004-025K2021 Feb 26693 x 811 km, 99.9 min, 98°.5
01:35Aqua (EOS PM-1)274242002-022A2021 Feb 26702 x 703 km, 98.8 min, 98°.2
10:27Athena462752020-061D2021 Feb 26516 x 519 km, 95.0 min, 97°.4
01:44Aura (EOS Chem-1)283762004-026A2021 Feb 26702 x 703 km, 98.8 min, 98°.2
02:14Calipso (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations)291082006-016B2021 Feb 26684 x 686 km, 98.5 min, 98°.3
09:36Capella 3474892021-006CE2021 Feb 26521 x 537 km, 95.2 min, 97°.5
09:36Capella 4474812021-006BW2021 Feb 26520 x 537 km, 95.2 min, 97°.5
09:22CEPE (Cylindrical Electrostatic Probe Experiment)47941970-106B2021 Feb 261422 x 1480 km, 114.9 min, 101°.5
02:15Cloudsat291072006-016A2021 Feb 26685 x 686 km, 98.5 min, 98°.3
06:22COBE203221989-089A2021 Feb 26870 x 884 km, 102.5 min, 98°.9
06:09Coriolis276402003-001A2021 Feb 26818 x 839 km, 101.5 min, 98°.7
20:40DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2021 Feb 26815 x 871 km, 101.8 min, 98°.9
20:23DMSP 5A F-1 (Defense Meteorological Satellite Program)32661968-042A2021 Feb 26802 x 880 km, 101.7 min, 98°.8
20:25DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2021 Feb 26764 x 828 km, 100.8 min, 98°.7
19:00DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2021 Feb 26769 x 828 km, 100.8 min, 98°.7
18:42DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2021 Feb 26774 x 851 km, 101.1 min, 98°.8
17:55DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2021 Feb 26789 x 799 km, 100.7 min, 98°.6
00:43ESSA 220911966-016A2021 Feb 261355 x 1414 km, 113.4 min, 101°.2
08:54ESSA 937641969-016A2021 Feb 261425 x 1505 km, 115.2 min, 101°.6
01:45Fedsat275982002-056B2021 Feb 26790 x 802 km, 100.8 min, 98°.6
10:30Geoeye 1333312008-042A2021 Feb 26674 x 685 km, 98.3 min, 98°.1
09:06Global-1 (Pathfinder 1)417872016-059E2021 Feb 26660 x 702 km, 98.4 min, 98°.0
10:15Global-2438122018-099BG2021 Feb 26570 x 591 km, 96.3 min, 97°.7
17:58GNOMES 1 (GNSS Navigation and Occultation Measurement Satellites)462662020-059B2021 Feb 26601 x 607 km, 96.8 min, 97°.9
10:27ION mk01 SCV LUCAS (In Orbit Now Satellite Carrier Vehicle)462742020-061C2021 Feb 26516 x 524 km, 95.0 min, 97°.4
09:36ION SCV (Laurentius)475042021-006CV2021 Feb 26522 x 538 km, 95.2 min, 97°.5
17:38IRAS137771983-004A2021 Feb 26879 x 906 km, 102.8 min, 99°.0
17:45IRIS (Interface Region Imaging Spectrometer)391972013-033A2021 Feb 26613 x 653 km, 97.4 min, 98°.0
10:02ITOS 143201970-008A2021 Feb 261433 x 1478 km, 115.0 min, 101°.7
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2021 Feb 26702 x 703 km, 98.8 min, 98°.2
10:40LKW-2 (Land Survey Satellite 2)430802017-084A2021 Feb 26490 x 501 km, 94.5 min, 97°.4
23:17Nimbus 3 (Nimbus B2)38901969-037A2021 Feb 261070 x 1130 km, 107.3 min, 99°.9
23:44Nimbus 4 (Nimbus D)43621970-025A2021 Feb 261086 x 1098 km, 107.1 min, 100°.0
23:24Nimbus 5 (Nimbus E)63051972-097A2021 Feb 261088 x 1100 km, 107.1 min, 99°.9
22:56Nimbus 6 (Nimbus F)79241975-052A2021 Feb 261101 x 1112 km, 107.4 min, 100°.1
10:01NOAA 1 (ITOS A)47931970-106A2021 Feb 261423 x 1473 km, 114.8 min, 101°.6
03:45NOAA 2 (ITOS D)62351972-082A2021 Feb 261448 x 1454 km, 114.9 min, 101°.9
03:42NOAA 4 (ITOS G)75291974-089A2021 Feb 261444 x 1458 km, 114.9 min, 101°.8
03:21NOAA 5 (ITOS H)90571976-077A2021 Feb 261508 x 1524 km, 116.3 min, 102°.0
04:38NOAA 8 (NOAA E)139231983-022A2021 Feb 26785 x 807 km, 100.8 min, 98°.6
04:48NOAA 10 (NOAA G)169691986-073A2021 Feb 26790 x 806 km, 100.8 min, 98°.5
05:57NOAA 12 (NOAA D)212631991-032A2021 Feb 26796 x 814 km, 101.0 min, 98°.5
07:21NOAA 15 (NOAA K)253381998-030A2021 Feb 26798 x 812 km, 101.0 min, 98°.7
09:58NOAA 16 (NOAA L)265362000-055A2021 Feb 26840 x 857 km, 101.9 min, 98°.7
01:53NOAA 17 (NOAA M)274532002-032A2021 Feb 26800 x 816 km, 101.0 min, 98°.6
01:25NOAA 20 (JPSS 1)430132017-073A2021 Feb 26826 x 828 km, 101.4 min, 98°.7
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2021 Feb 26702 x 703 km, 98.8 min, 98°.2
09:32Orbcomm-X (Orbcomm-X)215761991-050C2021 Feb 26751 x 755 km, 99.9 min, 98°.5
13:17OrbView-2248831997-037A2021 Feb 26777 x 782 km, 100.4 min, 98°.6
09:25Oscar 5 (Australis Oscar 5)43211970-008B2021 Feb 261433 x 1477 km, 115.0 min, 101°.6
03:42Oscar 7 (AO-7)75301974-089B2021 Feb 261440 x 1459 km, 114.9 min, 101°.8
02:34Oscar 8 (AO-8)107031978-026B2021 Feb 26892 x 900 km, 102.9 min, 99°.1
06:08QuakeSat278452003-031F2021 Feb 26810 x 825 km, 101.2 min, 98°.7
23:07SECOR 13 (EGRS 13)38911969-037B2021 Feb 261069 x 1128 km, 107.2 min, 99°.9
10:42Skysat 1394182013-066C2021 Feb 26555 x 585 km, 96.1 min, 97°.6
10:41Skysat 3 (Skysat C1)416012016-040C2021 Feb 26449 x 452 km, 93.6 min, 97°.2
10:10Skysat 4 (Skysat C2)417732016-058D2021 Feb 26449 x 452 km, 93.6 min, 97°.2
10:09Skysat 5 (Skysat C3)417742016-058E2021 Feb 26449 x 452 km, 93.6 min, 97°.2
10:08Skysat 6 (Skysat C4)417712016-058B2021 Feb 26449 x 452 km, 93.6 min, 97°.2
10:05Skysat 7 (Skysat C5)417722016-058C2021 Feb 26491 x 494 km, 94.5 min, 97°.3
13:14Skysat 8 (Skysat C6)429922017-068F2021 Feb 26446 x 451 km, 93.6 min, 97°.3
13:13Skysat 9 (Skysat C7)429912017-068E2021 Feb 26447 x 450 km, 93.6 min, 97°.3
13:13Skysat 10 (Skysat C8)429902017-068D2021 Feb 26448 x 449 km, 93.6 min, 97°.3
13:09Skysat 11 (Skysat C9)429892017-068C2021 Feb 26446 x 450 km, 93.6 min, 97°.2
13:11Skysat 12 (Skysat C10)429882017-068B2021 Feb 26448 x 449 km, 93.6 min, 97°.3
13:12Skysat 13 (Skysat C11)429872017-068A2021 Feb 26442 x 454 km, 93.6 min, 97°.2
10:13Skysat 14 (Skysat C12)437972018-099AR2021 Feb 26448 x 452 km, 93.6 min, 97°.2
10:11SkySat 15 (Skysat C13)438022018-099AW2021 Feb 26462 x 468 km, 93.9 min, 97°.2
05:58SMAP (Soil Moisture Active Passive)403762015-003A2021 Feb 26682 x 683 km, 98.4 min, 98°.1
09:36Starlink 2199474132021-006A2021 Feb 26513 x 532 km, 95.1 min, 97°.5
10:19STPSat-5437622018-099E2021 Feb 26568 x 589 km, 96.2 min, 97°.7
01:24Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2021 Feb 26826 x 827 km, 101.4 min, 98°.7
10:29Terra (EOS AM-1)259941999-068A2021 Feb 26702 x 703 km, 98.8 min, 98°.2
09:22TIROS-N110601978-096A2021 Feb 26823 x 839 km, 101.5 min, 98°.7
13:40TIROS 1014301965-051A2021 Feb 26717 x 798 km, 100.0 min, 98°.3
13:57TOMS-EP239401996-037A2021 Feb 26687 x 729 km, 98.9 min, 98°.3
23:23TOPO 143631970-025B2021 Feb 261083 x 1087 km, 106.9 min, 99°.9
18:08TRACE252801998-020A2021 Feb 26508 x 541 km, 95.1 min, 97°.5
18:01USA 26 (DMSP 5D-2 F-8)181231987-053A2021 Feb 26821 x 838 km, 101.5 min, 98°.7
07:00USA 73 (DMSP 5D-2 F-11)217981991-082A2021 Feb 26827 x 847 km, 101.7 min, 98°.9
05:45USA 109 (DMSP 5D-2 F-13)235331995-015A2021 Feb 26835 x 843 km, 101.7 min, 98°.8
04:22USA 172 (DMSP 5D-3 F-16)280542003-048A2021 Feb 26842 x 852 km, 101.9 min, 98°.9
08:03USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2021 May 9262 x 462 km, 91.8 min, 96°.9
06:37USA 191 (DMSP 5D-3 F-17)295222006-050A2021 Feb 26838 x 853 km, 101.8 min, 98°.8
12:02USA 205 (STSS-ATRR)349032009-023A2021 May 7865 x 877 km, 102.4 min, 98°.9
04:34USA 210 (DMSP 5D-3 F-18)359512009-057A2021 Feb 26840 x 856 km, 101.9 min, 98°.7
20:17USA 216 (SBSS)371682010-048A2021 Feb 26623 x 625 km, 97.2 min, 97°.9
12:55USA 224 (KH- 11 Block-4 F2?/Crystal)373482011-002A2021 May 8255 x 996 km, 97.2 min, 97°.9
09:40USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2021 May 6267 x 985 km, 97.2 min, 97°.9
06:09USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Feb 26839 x 853 km, 101.8 min, 98°.8
13:00USA 314 (KH-11 Block-5 F-2/Crystal)482472021-032A2021 May 7549 x 772 km, 97.9 min, 98°.1
01:36WestPac253981998-043E2021 Feb 26814 x 817 km, 101.2 min, 98°.8
07:57WISE (Wide Field IR Explorer)361192009-071A2021 Feb 26472 x 476 km, 94.1 min, 97°.3
13:30WorldView 1320602007-041A2021 Feb 26493 x 494 km, 94.5 min, 97°.4
10:27WorldView 2359462009-055A2021 Feb 26765 x 767 km, 100.2 min, 98°.5
10:30Worldview 3401152014-048A2021 Feb 26612 x 614 km, 97.0 min, 97°.9
09:36XR-1475072021-006CY2021 Feb 26522 x 537 km, 95.2 min, 97°.5

For the 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.

Classified - updated: 2021 May 11
SpaceTrack - updated: 2021 Feb 27

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