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Orbits


Tyneside, UK
2020 Feb 20
Thursday, Day 51

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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
00:54Amsat Echo (AO-51)283752004-025K2020 Feb 19694 x 810 km, 99.9 min, 98°.4
01:03ESSA 220911966-016A2020 Feb 191355 x 1414 km, 113.4 min, 101°.2
01:24Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2020 Feb 19826 x 827 km, 101.4 min, 98°.7
01:25NOAA 20 (JPSS 1)430132017-073A2020 Feb 19826 x 828 km, 101.4 min, 98°.7
01:27WESTPAC253981998-043E2020 Feb 19814 x 817 km, 101.2 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2020 Feb 19701 x 704 km, 98.8 min, 98°.2
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2020 Feb 19702 x 703 km, 98.8 min, 98°.2
01:44Aura (EOS Chem-1)283762004-026A2020 Feb 19702 x 703 km, 98.8 min, 98°.2
01:48Fedsat275982002-056B2020 Feb 19790 x 802 km, 100.8 min, 98°.6
01:56Calipso (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations)291082006-016B2020 Feb 19685 x 686 km, 98.5 min, 98°.2
01:57Cloudsat291072006-016A2020 Feb 19684 x 687 km, 98.5 min, 98°.2
02:03NOAA 17 (NOAA M)274532002-032A2020 Feb 19800 x 816 km, 101.0 min, 98°.6
02:30Oscar 8 (AO-8)107031978-026B2020 Feb 19891 x 901 km, 102.9 min, 99°.0
03:26NOAA 2 (ITOS D)62351972-082A2020 Feb 191448 x 1454 km, 114.9 min, 101°.8
03:28NOAA 4 (ITOS G)75291974-089A2020 Feb 191445 x 1458 km, 114.9 min, 101°.8
03:28NOAA 5 (ITOS H)90571976-077A2020 Feb 191508 x 1524 km, 116.3 min, 102°.0
03:28Oscar 7 (AO-7)75301974-089B2020 Feb 191440 x 1459 km, 114.9 min, 101°.8
03:34NOAA 3 (ITOS F)69201973-086A2020 Feb 191500 x 1510 km, 116.1 min, 102°.1
03:36Oscar 6 (AO-6)62361972-082B2020 Feb 191448 x 1454 km, 114.9 min, 101°.9
04:04USA 172 (DMSP 5D-3 F-16)280542003-048A2020 Feb 19842 x 852 km, 101.9 min, 98°.9
04:33NOAA 8 (NOAA E)139231983-022A2020 Feb 19785 x 807 km, 100.8 min, 98°.6
05:05NOAA 10 (NOAA G)169691986-073A2020 Feb 19790 x 806 km, 100.8 min, 98°.5
05:21NOAA 6 (NOAA A)114161979-057A2020 Feb 19773 x 787 km, 100.4 min, 98°.7
05:40USA 109 (DMSP 5D-2 F-13)235331995-015A2020 Feb 19835 x 843 km, 101.7 min, 98°.8
05:59SMAP (Soil Moisture Active Passive)403762015-003A2020 Feb 19681 x 683 km, 98.4 min, 98°.1
06:06Microsat 2A (Tintin A)432162018-020B2020 Feb 19496 x 511 km, 94.7 min, 97°.5
06:09Microsat 2B (Tintin B)432172018-020C2020 Feb 19496 x 511 km, 94.7 min, 97°.5
06:09QuakeSat278452003-031F2020 Feb 19811 x 825 km, 101.2 min, 98°.7
06:11Coriolis276402003-001A2020 Feb 19818 x 839 km, 101.5 min, 98°.7
06:19NOAA 12 (NOAA D)212631991-032A2020 Feb 19796 x 815 km, 101.0 min, 98°.5
06:19USA 249 (DMSP 5D-3 F-19)396302014-015A2020 Feb 19839 x 853 km, 101.8 min, 98°.8
06:29COBE203221989-089A2020 Feb 19870 x 884 km, 102.5 min, 98°.9
06:38USA 191 (DMSP 5D-3 F-17)295222006-050A2020 Feb 19838 x 853 km, 101.8 min, 98°.8
07:08NOAA 15 (NOAA K)253381998-030A2020 Feb 19798 x 812 km, 101.0 min, 98°.7
07:57WISE (Wide Field IR Explorer)361192009-071A2020 Feb 19473 x 479 km, 94.1 min, 97°.3
08:02USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2019 Oct 7261 x 450 km, 91.7 min, 96°.9
09:14ESSA 937641969-016A2020 Feb 191425 x 1505 km, 115.2 min, 101°.6
09:24TIROS-N110601978-096A2020 Feb 19823 x 840 km, 101.5 min, 98°.8
09:26Pathfinder 1417872016-059E2020 Feb 19660 x 702 km, 98.4 min, 98°.0
09:40CEPE (Cylindrical Electrostatic Probe Experiment)47941970-106B2020 Feb 191422 x 1480 km, 114.9 min, 101°.6
09:41USA 245 (KH- 11 Block-4 F3?/Crystal)392322013-043A2019 Oct 4266 x 999 km, 97.4 min, 97°.9
09:42Oscar 5 (Australis Oscar 5)43211970-008B2020 Feb 191433 x 1477 km, 115.0 min, 101°.6
09:50Landsat 7256821999-020A2020 Feb 19702 x 703 km, 98.8 min, 98°.1
10:06NOAA 1 (ITOS A)47931970-106A2020 Feb 191423 x 1473 km, 114.8 min, 101°.7
10:09ITOS 143201970-008A2020 Feb 191433 x 1479 km, 115.0 min, 101°.7
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2020 Feb 19702 x 703 km, 98.8 min, 98°.2
10:13NOAA 16 (NOAA L)265362000-055A2020 Feb 19840 x 857 km, 101.9 min, 98°.7
10:13Skysat 6 (Skysat C5)417722016-058C2020 Feb 19494 x 496 km, 94.5 min, 97°.4
10:15Skysat 7 (Skysat C4)417712016-058B2020 Feb 19494 x 496 km, 94.5 min, 97°.4
10:16Skysat 4 (Skysat C2)417732016-058D2020 Feb 19494 x 496 km, 94.5 min, 97°.4
10:16Skysat 5 (Skysat C3)417742016-058E2020 Feb 19493 x 496 km, 94.5 min, 97°.4
10:22STPSat-5437622018-099E2020 Feb 19570 x 589 km, 96.3 min, 97°.7
10:29Terra (EOS AM-1)259941999-068A2020 Feb 19702 x 704 km, 98.8 min, 98°.2
10:29WorldView 2359462009-055A2020 Feb 19765 x 767 km, 100.2 min, 98°.4
10:30Geoeye 1333312008-042A2020 Feb 19672 x 686 km, 98.3 min, 98°.1
10:40Worldview 3401152014-048A2020 Feb 19612 x 614 km, 97.0 min, 97°.8
10:45LKW-2 (Land Survey Satellite 2)430802017-084A2020 Feb 19489 x 502 km, 94.5 min, 97°.4
10:45Skysat 3 (Skysat Gen 2-1)416012016-040C2020 Feb 19494 x 496 km, 94.5 min, 97°.4
10:54Skysat 1394182013-066C2020 Feb 19557 x 584 km, 96.1 min, 97°.6
12:01USA 205 (STSS-ATRR)349032009-023A2019 Sep 27866 x 876 km, 102.4 min, 98°.9
12:56USA 224 (KH- 11 Block-4 F2?/Crystal)373482011-002A2019 Aug 27259 x 1010 km, 97.4 min, 97°.9
13:02OrbView-2248831997-037A2020 Feb 19777 x 782 km, 100.5 min, 98°.6
13:08Skysat C9429892017-068C2020 Feb 19450 x 454 km, 93.6 min, 97°.2
13:09Skysat C10429882017-068B2020 Feb 19449 x 457 km, 93.6 min, 97°.2
13:10Skysat C11429872017-068A2020 Feb 19462 x 477 km, 94.0 min, 97°.3
13:11Skysat C6429922017-068F2020 Feb 19450 x 455 km, 93.6 min, 97°.2
13:11Skysat C7429912017-068E2020 Feb 19450 x 454 km, 93.6 min, 97°.2
13:11Skysat C8429902017-068D2020 Feb 19449 x 455 km, 93.6 min, 97°.2
13:32WorldView 1320602007-041A2020 Feb 19492 x 494 km, 94.5 min, 97°.4
13:50ACRIMSAT260331999-070B2020 Feb 19665 x 706 km, 98.5 min, 98°.1
13:56TOMS-EP239401996-037A2020 Feb 19688 x 729 km, 98.9 min, 98°.2
17:40IRIS (Interface Region Imaging Spectrometer)391972013-033A2020 Feb 19615 x 652 km, 97.4 min, 98°.0
17:47IRAS137771983-004A2020 Feb 19879 x 906 km, 102.8 min, 99°.0
17:56DMSP 5D-2 F-6137361982-118A2020 Feb 19789 x 799 km, 100.7 min, 98°.6
18:04USA 26 (DMSP 5D-2 F-8)181231987-053A2020 Feb 19821 x 839 km, 101.5 min, 98°.7
18:16TRACE252801998-020A2020 Feb 19511 x 541 km, 95.2 min, 97°.5
18:24AMS 3 (DMSP 5D-1 F-3)108201978-042A2020 Feb 19767 x 781 km, 100.3 min, 98°.5
18:24DMSP 5C F-278161975-043A2020 Feb 19774 x 851 km, 101.1 min, 98°.8
18:46DMSP 5C F-174111974-063A2020 Feb 19769 x 828 km, 100.8 min, 98°.7
18:56DMSP 5B F-362751972-089A2020 Feb 19774 x 824 km, 100.8 min, 98°.5
20:01DMSP 2 F-3 (DAPP 15)21251966-026A2020 Feb 19595 x 813 km, 98.9 min, 98°.1
20:15USA 216 (SBSS)371682010-048A2020 Feb 19624 x 625 km, 97.2 min, 97°.9
20:25DMSP 5A F-132661968-042A2020 Feb 19802 x 880 km, 101.7 min, 98°.8
20:27DMSP 4A F-929201967-080A2020 Feb 19815 x 872 km, 101.8 min, 98°.9
20:41NOOR 1A448272019-084D2020 Feb 19342 x 394 km, 91.9 min, 97°.0
20:53USA 29 (DMSP 5D-2 F-9)188221988-006A2020 Feb 19796 x 806 km, 100.9 min, 98°.5
22:37Nimbus 6 (Nimbus F)79241975-052A2020 Feb 191100 x 1113 km, 107.4 min, 100°.1
23:12TOPO 143631970-025B2020 Feb 191084 x 1086 km, 106.9 min, 100°.0
23:16SECOR 13 (EGRS 13)38911969-037B2020 Feb 191069 x 1129 km, 107.2 min, 99°.9
23:22Nimbus 5 (Nimbus E)63051972-097A2020 Feb 191087 x 1101 km, 107.1 min, 99°.9
23:25Nimbus 3 (Nimbus B2)38901969-037A2020 Feb 191071 x 1129 km, 107.3 min, 99°.9
23:37Nimbus 4 (Nimbus D)43621970-025A2020 Feb 191087 x 1097 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: 2020 Feb 19
SpaceTrack - updated: 2020 Feb 20

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