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Orbits


Tyneside, UK
2021 Jan 25
Monday, Day 25

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Primary source of unclassified orbital elements

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

This a list of satellites in sun-synchronous orbit operated by the USA ordered by LTDN - Local Time at the Descending Node. 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
00:45ESSA 220911966-016A2021 Jan 241355 x 1414 km, 113.4 min, 101°.2
00:58Amsat Echo (AO-51)283752004-025K2021 Jan 24694 x 810 km, 99.9 min, 98°.5
01:24NOAA 20 (JPSS 1)430132017-073A2021 Jan 24826 x 828 km, 101.4 min, 98°.7
01:24Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2021 Jan 24826 x 828 km, 101.4 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2021 Jan 24701 x 704 km, 98.8 min, 98°.2
01:35OCO 2 (Orbiting Carbon Observatory)400592014-035A2021 Jan 24702 x 703 km, 98.8 min, 98°.2
01:35WestPac253981998-043E2021 Jan 24814 x 817 km, 101.2 min, 98°.8
01:44Aura (EOS Chem-1)283762004-026A2021 Jan 24702 x 703 km, 98.8 min, 98°.2
01:45Fedsat275982002-056B2021 Jan 24790 x 802 km, 100.8 min, 98°.6
01:54NOAA 17 (NOAA M)274532002-032A2021 Jan 24800 x 816 km, 101.0 min, 98°.6
02:12Calipso (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations)291082006-016B2021 Jan 24684 x 686 km, 98.5 min, 98°.3
02:13Cloudsat291072006-016A2021 Jan 24684 x 687 km, 98.5 min, 98°.3
02:34Oscar 8 (AO-8)107031978-026B2021 Jan 24892 x 901 km, 102.9 min, 99°.1
03:22NOAA 5 (ITOS H)90571976-077A2021 Jan 241508 x 1524 km, 116.3 min, 102°.0
03:40NOAA 4 (ITOS G)75291974-089A2021 Jan 241444 x 1459 km, 114.9 min, 101°.8
03:41Oscar 7 (AO-7)75301974-089B2021 Jan 241440 x 1459 km, 114.9 min, 101°.8
03:43NOAA 2 (ITOS D)62351972-082A2021 Jan 241448 x 1455 km, 114.9 min, 101°.9
04:20USA 172 (DMSP 5D-3 F-16)280542003-048A2021 Jan 24842 x 852 km, 101.9 min, 98°.9
04:36USA 210 (DMSP 5D-3 F-18)359512009-057A2021 Jan 24839 x 857 km, 101.9 min, 98°.7
04:37NOAA 8 (NOAA E)139231983-022A2021 Jan 24786 x 806 km, 100.8 min, 98°.6
04:49NOAA 10 (NOAA G)169691986-073A2021 Jan 24789 x 807 km, 100.8 min, 98°.5
05:45USA 109 (DMSP 5D-2 F-13)235331995-015A2021 Jan 24834 x 844 km, 101.7 min, 98°.8
05:59NOAA 12 (NOAA D)212631991-032A2021 Jan 24795 x 816 km, 101.0 min, 98°.5
05:59SMAP (Soil Moisture Active Passive)403762015-003A2021 Jan 24681 x 684 km, 98.4 min, 98°.1
06:08QuakeSat278452003-031F2021 Jan 24811 x 824 km, 101.2 min, 98°.7
06:10Coriolis276402003-001A2021 Jan 24818 x 839 km, 101.5 min, 98°.7
06:10USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Jan 24838 x 854 km, 101.8 min, 98°.7
06:23COBE203221989-089A2021 Jan 24871 x 883 km, 102.5 min, 98°.9
06:37USA 191 (DMSP 5D-3 F-17)295222006-050A2021 Jan 24839 x 852 km, 101.8 min, 98°.8
06:58USA 73 (DMSP 5D-2 F-11)217981991-082A2021 Jan 24827 x 847 km, 101.7 min, 98°.9
07:20NOAA 15 (NOAA K)253381998-030A2021 Jan 24798 x 812 km, 101.0 min, 98°.7
07:57WISE (Wide Field IR Explorer)361192009-071A2021 Jan 24473 x 475 km, 94.1 min, 97°.3
08:03USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2021 Jan 9293 x 419 km, 91.7 min, 96°.8
08:56ESSA 937641969-016A2021 Jan 241425 x 1505 km, 115.2 min, 101°.6
09:08Global-1 (Pathfinder 1)417872016-059E2021 Jan 24660 x 702 km, 98.4 min, 98°.0
09:22TIROS-N110601978-096A2021 Jan 24823 x 839 km, 101.5 min, 98°.7
09:24CEPE (Cylindrical Electrostatic Probe Experiment)47941970-106B2021 Jan 241422 x 1480 km, 114.9 min, 101°.5
09:26Oscar 5 (Australis Oscar 5)43211970-008B2021 Jan 241433 x 1477 km, 115.0 min, 101°.6
09:39USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2020 Dec 30267 x 1000 km, 97.4 min, 97°.9
09:59NOAA 16 (NOAA L)265362000-055A2021 Jan 24840 x 856 km, 101.9 min, 98°.7
10:02NOAA 1 (ITOS A)47931970-106A2021 Jan 241423 x 1473 km, 114.8 min, 101°.6
10:03ITOS 143201970-008A2021 Jan 241433 x 1478 km, 115.0 min, 101°.7
10:06Skysat 7 (Skysat C5)417722016-058C2021 Jan 24492 x 494 km, 94.5 min, 97°.3
10:09Skysat 6 (Skysat C4)417712016-058B2021 Jan 24450 x 452 km, 93.6 min, 97°.2
10:10Skysat 4 (Skysat C2)417732016-058D2021 Jan 24450 x 452 km, 93.6 min, 97°.2
10:10Skysat 5 (Skysat C3)417742016-058E2021 Jan 24450 x 452 km, 93.6 min, 97°.2
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2021 Jan 24702 x 703 km, 98.8 min, 98°.2
10:12SkySat 15 (Skysat C13)438022018-099AW2021 Jan 24463 x 467 km, 93.9 min, 97°.2
10:14Skysat 14 (Skysat C12)437972018-099AR2021 Jan 24450 x 451 km, 93.6 min, 97°.2
10:16Global-2438122018-099BG2021 Jan 24571 x 590 km, 96.3 min, 97°.7
10:20STPSat-5437622018-099E2021 Jan 24569 x 589 km, 96.2 min, 97°.7
10:27ION mk01 SCV LUCAS (In Orbit Now Satellite Carrier Vehicle)462742020-061C2021 Jan 24514 x 525 km, 95.0 min, 97°.5
10:27WorldView 2359462009-055A2021 Jan 24764 x 768 km, 100.2 min, 98°.5
10:28Athena462752020-061D2021 Jan 24516 x 519 km, 95.0 min, 97°.4
10:29Terra (EOS AM-1)259941999-068A2021 Jan 24702 x 703 km, 98.8 min, 98°.2
10:29Worldview 3401152014-048A2021 Jan 24612 x 614 km, 97.0 min, 97°.9
10:30Geoeye 1333312008-042A2021 Jan 24672 x 686 km, 98.3 min, 98°.1
10:41LKW-2 (Land Survey Satellite 2)430802017-084A2021 Jan 24492 x 500 km, 94.5 min, 97°.4
10:42Skysat 3 (Skysat C1)416012016-040C2021 Jan 24447 x 454 km, 93.6 min, 97°.2
10:43Skysat 1394182013-066C2021 Jan 24554 x 585 km, 96.1 min, 97°.6
12:02USA 205 (STSS-ATRR)349032009-023A2020 Sep 18869 x 875 km, 102.4 min, 98°.9
12:56USA 224 (KH- 11 Block-4 F2?/Crystal)373482011-002A2020 Sep 25260 x 1018 km, 97.5 min, 97°.9
13:09Skysat 11 (Skysat C9)429892017-068C2021 Jan 24448 x 450 km, 93.6 min, 97°.2
13:11Skysat 12 (Skysat C10)429882017-068B2021 Jan 24446 x 452 km, 93.6 min, 97°.3
13:11Skysat 13 (Skysat C11)429872017-068A2021 Jan 24443 x 455 km, 93.6 min, 97°.2
13:12Skysat 10 (Skysat C8)429902017-068D2021 Jan 24447 x 450 km, 93.6 min, 97°.3
13:12Skysat 9 (Skysat C7)429912017-068E2021 Jan 24448 x 450 km, 93.6 min, 97°.3
13:13Skysat 8 (Skysat C6)429922017-068F2021 Jan 24448 x 449 km, 93.6 min, 97°.3
13:15OrbView-2248831997-037A2021 Jan 24778 x 782 km, 100.4 min, 98°.6
13:30WorldView 1320602007-041A2021 Jan 24491 x 493 km, 94.5 min, 97°.4
13:41ACRIMSat (Active Cavity Radiometer Irradiance Monitor Satellite)260331999-070B2021 Jan 24665 x 706 km, 98.5 min, 98°.1
13:42TIROS 1014301965-051A2021 Jan 24718 x 797 km, 100.0 min, 98°.3
13:57TOMS-EP239401996-037A2021 Jan 24688 x 728 km, 98.9 min, 98°.3
17:39IRAS137771983-004A2021 Jan 24878 x 907 km, 102.8 min, 99°.0
17:44IRIS (Interface Region Imaging Spectrometer)391972013-033A2021 Jan 24614 x 652 km, 97.4 min, 98°.0
17:55DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2021 Jan 24789 x 799 km, 100.7 min, 98°.6
17:57GNOMES 1 (GNSS Navigation and Occultation Measurement Satellites)462662020-059B2021 Jan 24600 x 608 km, 96.8 min, 97°.9
18:01USA 26 (DMSP 5D-2 F-8)181231987-053A2021 Jan 24820 x 840 km, 101.5 min, 98°.7
18:08TRACE252801998-020A2021 Jan 24509 x 541 km, 95.1 min, 97°.5
18:30AMS 3 (DMSP 5D-1 F-3)108201978-042A2021 Jan 24766 x 781 km, 100.3 min, 98°.5
18:41DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2021 Jan 24774 x 851 km, 101.1 min, 98°.8
18:59DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2021 Jan 24768 x 829 km, 100.8 min, 98°.7
20:17USA 216 (SBSS)371682010-048A2021 Jan 24624 x 625 km, 97.2 min, 97°.9
20:23DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2021 Jan 24765 x 827 km, 100.8 min, 98°.7
20:24DMSP 5A F-1 (Defense Meteorological Satellite Program)32661968-042A2021 Jan 24803 x 879 km, 101.7 min, 98°.8
20:39DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2021 Jan 24816 x 870 km, 101.8 min, 98°.9
22:54Nimbus 6 (Nimbus F)79241975-052A2021 Jan 241101 x 1112 km, 107.4 min, 100°.1
23:08SECOR 13 (EGRS 13)38911969-037B2021 Jan 241069 x 1128 km, 107.2 min, 99°.9
23:18Nimbus 3 (Nimbus B2)38901969-037A2021 Jan 241070 x 1130 km, 107.3 min, 99°.9
23:22TOPO 143631970-025B2021 Jan 241083 x 1087 km, 106.9 min, 99°.9
23:24Nimbus 5 (Nimbus E)63051972-097A2021 Jan 241088 x 1100 km, 107.1 min, 99°.9
23:43Nimbus 4 (Nimbus D)43621970-025A2021 Jan 241086 x 1098 km, 107.1 min, 100°.0

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 Jan 23
SpaceTrack - updated: 2021 Jan 25

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