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Orbits


Tyneside, UK
2019 Nov 22
Friday, Day 326

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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)283752004-025K2019 Nov 21693 x 812 km, 99.9 min, 98°.4
01:08ESSA 220911966-016A2019 Nov 201354 x 1415 km, 113.4 min, 101°.2
01:24NOAA 20 (JPSS 1)430132017-073A2019 Nov 21826 x 828 km, 101.4 min, 98°.7
01:25Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2019 Nov 21826 x 828 km, 101.4 min, 98°.7
01:25WESTPAC253981998-043E2019 Nov 21815 x 816 km, 101.2 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2019 Nov 21702 x 703 km, 98.8 min, 98°.2
01:35OCO 2 (Orbiting Carbon Observatory)400592014-035A2019 Nov 21702 x 703 km, 98.8 min, 98°.2
01:44Aura (EOS Chem-1)283762004-026A2019 Nov 21702 x 703 km, 98.8 min, 98°.2
01:50Fedsat275982002-056B2019 Nov 21789 x 803 km, 100.8 min, 98°.5
01:53Calipso (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations)291082006-016B2019 Nov 21685 x 687 km, 98.5 min, 98°.2
01:54Cloudsat291072006-016A2019 Nov 21685 x 686 km, 98.5 min, 98°.2
02:06NOAA 17 (NOAA M)274532002-032A2019 Nov 21799 x 817 km, 101.0 min, 98°.6
02:16NOAA 9 (NOAA F)154271984-123A2019 Nov 21828 x 849 km, 101.7 min, 98°.9
02:30Oscar 8 (AO-8)107031978-026B2019 Nov 21891 x 902 km, 102.9 min, 99°.0
02:51ERTS 1 (ERTS A)61261972-058A2019 Nov 21897 x 908 km, 103.0 min, 99°.2
03:23NOAA 2 (ITOS D)62351972-082A2019 Nov 211448 x 1455 km, 114.9 min, 101°.8
03:25NOAA 4 (ITOS G)75291974-089A2019 Nov 211444 x 1459 km, 114.9 min, 101°.8
03:25Oscar 7 (AO-7)75301974-089B2019 Nov 211440 x 1459 km, 114.9 min, 101°.8
03:31NOAA 5 (ITOS H)90571976-077A2019 Nov 211508 x 1524 km, 116.3 min, 102°.0
03:32NOAA 3 (ITOS F)69201973-086A2019 Nov 211500 x 1510 km, 116.1 min, 102°.1
03:32Oscar 6 (AO-6)62361972-082B2019 Nov 201448 x 1455 km, 114.9 min, 101°.8
04:01USA 172 (DMSP 5D-3 F-16)280542003-048A2019 Nov 21841 x 853 km, 101.9 min, 98°.9
04:33NOAA 8 (NOAA E)139231983-022A2019 Nov 21784 x 808 km, 100.8 min, 98°.6
05:09NOAA 10 (NOAA G)169691986-073A2019 Nov 21790 x 807 km, 100.8 min, 98°.5
05:16NOAA 6 (NOAA A)114161979-057A2019 Nov 21772 x 788 km, 100.4 min, 98°.6
05:39USA 109 (DMSP 5D-2 F-13)235331995-015A2019 Nov 21834 x 844 km, 101.7 min, 98°.8
05:59SMAP (Soil Moisture Active Passive)403762015-003A2019 Nov 21682 x 683 km, 98.4 min, 98°.1
06:05Microsat 2A (Tintin A)432162018-020B2019 Nov 21496 x 512 km, 94.7 min, 97°.5
06:08Microsat 2B (Tintin B)432172018-020C2019 Nov 21496 x 512 km, 94.7 min, 97°.5
06:10QuakeSat278452003-031F2019 Nov 21812 x 824 km, 101.2 min, 98°.7
06:11Coriolis276402003-001A2019 Nov 21819 x 838 km, 101.5 min, 98°.7
06:21USA 249 (DMSP 5D-3 F-19)396302014-015A2019 Nov 21839 x 853 km, 101.8 min, 98°.8
06:25NOAA 12 (NOAA D)212631991-032A2019 Nov 21796 x 815 km, 101.0 min, 98°.5
06:30COBE203221989-089A2019 Nov 21871 x 883 km, 102.5 min, 98°.9
06:38USA 191 (DMSP 5D-3 F-17)295222006-050A2019 Nov 21838 x 853 km, 101.8 min, 98°.8
07:04NOAA 15 (NOAA K)253381998-030A2019 Nov 21797 x 813 km, 101.0 min, 98°.7
07:56WISE (Wide Field IR Explorer)361192009-071A2019 Nov 21474 x 479 km, 94.1 min, 97°.4
08:02USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2019 Oct 7261 x 450 km, 91.7 min, 96°.9
09:18ESSA 937641969-016A2019 Nov 201425 x 1505 km, 115.2 min, 101°.7
09:24TIROS-N110601978-096A2019 Nov 20824 x 838 km, 101.5 min, 98°.8
09:30Pathfinder 1417872016-059E2019 Nov 21660 x 702 km, 98.4 min, 98°.0
09:41USA 245 (KH- 11 Block-4 F3?/Crystal)392322013-043A2019 Oct 4266 x 999 km, 97.4 min, 97°.9
09:43CEPE (Cylindrical Electrostatic Probe Experiment)47941970-106B2019 Nov 201422 x 1480 km, 114.9 min, 101°.6
09:46Oscar 5 (Australis Oscar 5)43211970-008B2019 Nov 201434 x 1477 km, 115.0 min, 101°.6
09:55Landsat 7256821999-020A2019 Nov 21701 x 703 km, 98.8 min, 98°.1
10:06NOAA 1 (ITOS A)47931970-106A2019 Nov 211423 x 1472 km, 114.8 min, 101°.7
10:09ITOS 143201970-008A2019 Nov 201434 x 1478 km, 115.0 min, 101°.7
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2019 Nov 21702 x 703 km, 98.8 min, 98°.2
10:14Skysat 6 (Skysat C5)417722016-058C2019 Nov 21494 x 496 km, 94.5 min, 97°.4
10:16NOAA 16 (NOAA L)265362000-055A2019 Nov 21841 x 855 km, 101.9 min, 98°.8
10:16Skysat 7 (Skysat C4)417712016-058B2019 Nov 21494 x 496 km, 94.5 min, 97°.4
10:17Skysat 4 (Skysat C2)417732016-058D2019 Nov 21494 x 496 km, 94.5 min, 97°.4
10:17Skysat 5 (Skysat C3)417742016-058E2019 Nov 21494 x 496 km, 94.5 min, 97°.4
10:22STPSat-5437622018-099E2019 Nov 21569 x 590 km, 96.3 min, 97°.7
10:30Geoeye 1333312008-042A2019 Nov 21673 x 685 km, 98.3 min, 98°.1
10:30Terra (EOS AM-1)259941999-068A2019 Nov 21702 x 703 km, 98.8 min, 98°.2
10:31WorldView 2359462009-055A2019 Nov 21766 x 767 km, 100.2 min, 98°.4
10:43Worldview 3401152014-048A2019 Nov 21613 x 614 km, 97.0 min, 97°.8
10:45LKW-2 (Land Survey Satellite 2)430802017-084A2019 Nov 21490 x 501 km, 94.5 min, 97°.4
10:46Skysat 3 (Skysat Gen 2-1)416012016-040C2019 Nov 21494 x 497 km, 94.5 min, 97°.4
10:56Skysat 1394182013-066C2019 Nov 21556 x 585 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
12:59OrbView-2248831997-037A2019 Nov 20778 x 782 km, 100.5 min, 98°.6
13:08Skysat C10429882017-068B2019 Nov 21497 x 503 km, 94.6 min, 97°.4
13:08Skysat C11429872017-068A2019 Nov 21494 x 507 km, 94.6 min, 97°.4
13:09Skysat C8429902017-068D2019 Nov 21497 x 504 km, 94.6 min, 97°.4
13:09Skysat C9429892017-068C2019 Nov 21451 x 454 km, 93.6 min, 97°.2
13:10Skysat C6429922017-068F2019 Nov 21491 x 509 km, 94.6 min, 97°.4
13:10Skysat C7429912017-068E2019 Nov 21495 x 505 km, 94.6 min, 97°.4
13:31WorldView 1320602007-041A2019 Nov 21491 x 493 km, 94.5 min, 97°.4
13:54ACRIMSAT260331999-070B2019 Nov 21665 x 706 km, 98.5 min, 98°.1
13:56TOMS-EP239401996-037A2019 Nov 21688 x 729 km, 99.0 min, 98°.2
17:39IRIS (Interface Region Imaging Spectrometer)391972013-033A2019 Nov 21614 x 653 km, 97.4 min, 98°.0
17:49IRAS137771983-004A2019 Nov 21878 x 907 km, 102.8 min, 99°.0
17:57DMSP 5D-2 F-6137361982-118A2019 Nov 21788 x 800 km, 100.7 min, 98°.6
18:04USA 26 (DMSP 5D-2 F-8)181231987-053A2019 Nov 21821 x 839 km, 101.5 min, 98°.7
18:18TRACE252801998-020A2019 Nov 20511 x 542 km, 95.2 min, 97°.5
18:19DMSP 5C F-278161975-043A2019 Nov 21776 x 850 km, 101.1 min, 98°.8
18:23AMS 3 (DMSP 5D-1 F-3)108201978-042A2019 Nov 21768 x 780 km, 100.3 min, 98°.5
18:42DMSP 5C F-174111974-063A2019 Nov 21769 x 829 km, 100.8 min, 98°.7
19:02DMSP 5B F-362751972-089A2019 Nov 21773 x 824 km, 100.9 min, 98°.5
20:06DMSP 2 F-3 (DAPP 15)21251966-026A2019 Nov 21594 x 814 km, 98.9 min, 98°.1
20:14USA 216 (SBSS)371682010-048A2019 Nov 21624 x 625 km, 97.2 min, 97°.9
20:22DMSP 4A F-929201967-080A2019 Nov 21815 x 871 km, 101.8 min, 98°.9
20:24DMSP 5A F-132661968-042A2019 Nov 21803 x 879 km, 101.7 min, 98°.8
20:58USA 29 (DMSP 5D-2 F-9)188221988-006A2019 Nov 21797 x 805 km, 100.9 min, 98°.5
22:32Nimbus 6 (Nimbus F)79241975-052A2019 Nov 201101 x 1112 km, 107.4 min, 100°.1
23:09TOPO 143631970-025B2019 Nov 211083 x 1087 km, 106.9 min, 100°.0
23:18SECOR 13 (EGRS 13)38911969-037B2019 Nov 201069 x 1128 km, 107.2 min, 99°.9
23:21Nimbus 5 (Nimbus E)63051972-097A2019 Nov 201088 x 1100 km, 107.1 min, 99°.9
23:26Nimbus 3 (Nimbus B2)38901969-037A2019 Nov 211070 x 1130 km, 107.3 min, 99°.9
23:34Nimbus 4 (Nimbus D)43621970-025A2019 Nov 201086 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: 2019 Nov 20
SpaceTrack - updated: 2019 Nov 22

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