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Orbits


Tyneside, UK
2021 Oct 25
Monday, Day 298

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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
00:04Perseus-M 1400392014-033AF2021 Oct 24599 x 620 km, 96.9 min, 97°.9
00:12Perseus-M 2400372014-033AD2021 Oct 24597 x 619 km, 96.9 min, 97°.9
00:33ESSA 220911966-016A2021 Oct 241354 x 1415 km, 113.4 min, 101°.2
01:04Amsat Echo (AO-51)283752004-025K2021 Oct 24693 x 811 km, 99.9 min, 98°.5
01:22Kepler 04 (Antilles)464982020-068N2021 Oct 24548 x 567 km, 95.8 min, 97°.7
01:22Kepler 05 (Amidala)464992020-068P2021 Oct 24548 x 567 km, 95.8 min, 97°.7
01:24NOAA 20 (JPSS 1)430132017-073A2021 Oct 24826 x 828 km, 101.4 min, 98°.7
01:25Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2021 Oct 24827 x 827 km, 101.4 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2021 Oct 24702 x 703 km, 98.8 min, 98°.2
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2021 Oct 24701 x 704 km, 98.8 min, 98°.2
01:44Aura (EOS Chem-1)283762004-026A2021 Oct 24702 x 703 km, 98.8 min, 98°.2
01:51NOAA 17 (NOAA M)274532002-032A2021 Oct 24800 x 816 km, 101.0 min, 98°.6
02:41ESSA 836151968-114A2021 Oct 241413 x 1464 km, 114.6 min, 101°.5
02:42Oscar 8 (AO-8)107031978-026B2021 Oct 24892 x 901 km, 102.9 min, 99°.1
03:09El Camino Real (Momentus-X1)444082019-038Y2021 Oct 24512 x 543 km, 95.2 min, 97°.6
03:20NOAA 5 (ITOS H)90571976-077A2021 Oct 241509 x 1524 km, 116.3 min, 102°.1
03:54NOAA 4 (ITOS G)75291974-089A2021 Oct 241444 x 1458 km, 114.9 min, 101°.9
03:55Oscar 7 (AO-7)75301974-089B2021 Oct 241440 x 1459 km, 114.9 min, 101°.9
04:02NOAA 3 (ITOS F)69201973-086A2021 Oct 241500 x 1510 km, 116.1 min, 102°.2
04:19USA 210 (DMSP 5D-3 F-18)359512009-057A2021 Oct 24839 x 856 km, 101.9 min, 98°.7
04:40NOAA 10 (NOAA G)169691986-073A2021 Oct 24790 x 806 km, 100.8 min, 98°.5
04:44NOAA 8 (NOAA E)139231983-022A2021 Oct 24785 x 807 km, 100.8 min, 98°.7
05:43NOAA 12 (NOAA D)212631991-032A2021 Oct 24796 x 814 km, 101.0 min, 98°.5
05:50USA 109 (DMSP 5D-2 F-13)235331995-015A2021 Oct 24835 x 844 km, 101.7 min, 98°.8
05:58SMAP (Soil Moisture Active Passive)403762015-003A2021 Oct 24682 x 683 km, 98.4 min, 98°.1
06:03USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Oct 24838 x 853 km, 101.8 min, 98°.7
06:07QuakeSat278452003-031F2021 Oct 24810 x 824 km, 101.2 min, 98°.7
06:08Coriolis276402003-001A2021 Oct 24818 x 839 km, 101.5 min, 98°.7
06:17COBE203221989-089A2021 Oct 24870 x 884 km, 102.5 min, 98°.9
06:34USA 191 (DMSP 5D-3 F-17)295222006-050A2021 Oct 24839 x 852 km, 101.8 min, 98°.8
07:11USA 73 (DMSP 5D-2 F-11)217981991-082A2021 Oct 24827 x 847 km, 101.6 min, 98°.9
07:26NOAA 15 (NOAA K)253381998-030A2021 Oct 24798 x 812 km, 101.0 min, 98°.7
07:54WISE (Wide Field IR Explorer)361192009-071A2021 Oct 24469 x 475 km, 94.0 min, 97°.3
08:04USA 186 (KH- 11 Block-4 F1?/Crystal)288882005-042A2021 Oct 10260 x 424 km, 91.4 min, 96°.9
09:15TIROS-N110601978-096A2021 Oct 24823 x 839 km, 101.5 min, 98°.7
09:31Kepler 15 (SudoRMRF)474612021-006BA2021 Oct 24523 x 535 km, 95.2 min, 97°.5
09:31Kepler 13 (Lucky)475442021-006AT2021 Oct 24521 x 533 km, 95.2 min, 97°.5
09:32Kepler 12 (Boba)474462021-006AK2021 Oct 24517 x 534 km, 95.1 min, 97°.5
09:32Kepler 08 (Amarok)474762021-006BR2021 Oct 24522 x 535 km, 95.2 min, 97°.5
09:32Kepler 11 (Daneel)475032021-006CU2021 Oct 24521 x 535 km, 95.2 min, 97°.5
09:32XR-1475072021-006CY2021 Oct 24521 x 535 km, 95.2 min, 97°.5
09:32Kepler 09 (Artemis)475312021-006DX2021 Oct 24522 x 535 km, 95.2 min, 97°.5
09:33Capella 4474812021-006BW2021 Oct 24515 x 529 km, 95.1 min, 97°.5
09:33Kepler 10 (Baby Yoda)475012021-006CS2021 Oct 24518 x 534 km, 95.2 min, 97°.5
09:34Capella 3474892021-006CE2021 Oct 24516 x 529 km, 95.1 min, 97°.5
09:36Starlink 2199474132021-006A2021 Oct 24520 x 526 km, 95.1 min, 97°.5
09:41USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2021 Oct 21268 x 1012 km, 97.5 min, 97°.9
09:44Orbcomm-X (Orbcomm-X)215761991-050C2021 Oct 24751 x 755 km, 99.9 min, 98°.5
09:44NOAA 16 (NOAA L)265362000-055A2021 Oct 24840 x 856 km, 101.9 min, 98°.7
09:55ITOS 143201970-008A2021 Oct 241434 x 1478 km, 115.0 min, 101°.6
09:55NOAA 1 (ITOS A)47931970-106A2021 Oct 241423 x 1473 km, 114.8 min, 101°.6
09:56Skysat 7 (Skysat C5)417722016-058C2021 Oct 24490 x 492 km, 94.4 min, 97°.3
10:01Skysat 6 (Skysat C4)417712016-058B2021 Oct 24445 x 448 km, 93.5 min, 97°.2
10:02Skysat 5 (Skysat C3)417742016-058E2021 Oct 24445 x 448 km, 93.5 min, 97°.2
10:02SkySat 15 (Skysat C13)438022018-099AW2021 Oct 24457 x 466 km, 93.8 min, 97°.2
10:03Skysat 4 (Skysat C2)417732016-058D2021 Oct 24445 x 448 km, 93.5 min, 97°.2
10:07Skysat 14 (Skysat C12)437972018-099AR2021 Oct 24446 x 447 km, 93.5 min, 97°.2
10:07Cesium 1A492612021-088B2021 Oct 24550 x 582 km, 96.0 min, 97°.6
10:07Cesium 1B492622021-088C2021 Oct 24549 x 581 km, 96.0 min, 97°.6
10:07CUTE (Colorado Ultraviolet Transit Experiment)492632021-088D2021 Oct 24549 x 574 km, 95.9 min, 97°.6
10:08Global-2438122018-099BG2021 Oct 24571 x 589 km, 96.3 min, 97°.6
10:11Landsat 9492602021-088A2021 Oct 24683 x 691 km, 98.5 min, 98°.2
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2021 Oct 24702 x 704 km, 98.8 min, 98°.2
10:13STPSat-5437622018-099E2021 Oct 24569 x 587 km, 96.2 min, 97°.7
10:20ION mk01 SCV LUCAS (In Orbit Now Satellite Carrier Vehicle)462742020-061C2021 Oct 24515 x 522 km, 95.0 min, 97°.4
10:21Corvus BC3431182018-004H2021 Oct 24484 x 500 km, 94.4 min, 97°.4
10:21Athena462752020-061D2021 Oct 24516 x 517 km, 95.0 min, 97°.4
10:21Echostar Global 2462952020-061Z2021 Oct 24529 x 532 km, 95.2 min, 97°.5
10:21Kepler 03 (Tars)463192020-061AZ2021 Oct 24530 x 532 km, 95.2 min, 97°.5
10:25Terra (EOS AM-1)259941999-068A2021 Oct 24702 x 703 km, 98.8 min, 98°.2
10:26Arkyd 6A431302018-004V2021 Oct 24482 x 496 km, 94.4 min, 97°.4
10:28WorldView 2359462009-055A2021 Oct 24765 x 767 km, 100.2 min, 98°.5
10:29Geoeye 1333312008-042A2021 Oct 24674 x 684 km, 98.3 min, 98°.1
10:29Worldview 3401152014-048A2021 Oct 24611 x 615 km, 97.0 min, 97°.8
10:31Skysat 1394182013-066C2021 Oct 24556 x 583 km, 96.0 min, 97°.6
10:33LKW-2 (Land Survey Satellite 2)430802017-084A2021 Oct 24491 x 500 km, 94.5 min, 97°.3
10:37CICERO 7 (Community Initiative for Cellular Earth Remote Observation)431432018-004AJ2021 Oct 24475 x 486 km, 94.2 min, 97°.4
10:38Skysat 3 (Skysat C1)416012016-040C2021 Oct 24444 x 447 km, 93.5 min, 97°.2
12:03USA 205 (STSS-ATRR)349032009-023A2021 Sep 1864 x 877 km, 102.4 min, 98°.9
13:01USA 314 (KH-11 Block-5 F-2/Crystal)482472021-032A2021 Sep 8549 x 772 km, 98.0 min, 98°.1
13:15Skysat 11 (Skysat C9)429892017-068C2021 Oct 24444 x 445 km, 93.5 min, 97°.3
13:18Skysat 13 (Skysat C11)429872017-068A2021 Oct 24437 x 451 km, 93.5 min, 97°.3
13:18Skysat 12 (Skysat C10)429882017-068B2021 Oct 24442 x 447 km, 93.5 min, 97°.3
13:19Skysat 10 (Skysat C8)429902017-068D2021 Oct 24442 x 446 km, 93.5 min, 97°.3
13:20Skysat 9 (Skysat C7)429912017-068E2021 Oct 24442 x 445 km, 93.5 min, 97°.3
13:21Skysat 8 (Skysat C6)429922017-068F2021 Oct 24444 x 444 km, 93.5 min, 97°.3
13:28WorldView 1320602007-041A2021 Oct 24491 x 494 km, 94.5 min, 97°.4
13:29TIROS 1014301965-051A2021 Oct 24717 x 798 km, 100.0 min, 98°.4
13:29OrbView-2248831997-037A2021 Oct 24777 x 782 km, 100.4 min, 98°.7
13:38ACRIMSat (Active Cavity Radiometer Irradiance Monitor Satellite)260331999-070B2021 Oct 24665 x 705 km, 98.5 min, 98°.1
14:03TOMS-EP239401996-037A2021 Oct 24687 x 728 km, 98.9 min, 98°.3
14:05TROPICS Pathfinder (Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats)489012021-059Y2021 Oct 24521 x 535 km, 95.2 min, 97°.5
14:05YAM 3 (Yet Another Mission)489152021-059AN2021 Oct 24519 x 536 km, 95.2 min, 97°.5
14:06YAM 2 (Yet Another Mission)489112021-059AJ2021 Oct 24520 x 536 km, 95.2 min, 97°.5
14:06Hawkeye (Cluster 3 #2)489312021-059BE2021 Oct 24513 x 535 km, 95.1 min, 97°.5
14:06Lynk 06 (Shannon)489382021-059BM2021 Oct 24512 x 535 km, 95.1 min, 97°.5
14:06Sherpa LTE-1489412021-059BQ2021 Oct 24512 x 536 km, 95.1 min, 97°.5
14:06Tenzing (Tanker-001)489512021-059CA2021 Oct 24513 x 536 km, 95.1 min, 97°.5
14:06Arthur 1489532021-059CC2021 Oct 24513 x 533 km, 95.1 min, 97°.5
14:06Hawkeye (Cluster 3 #1)489572021-059CG2021 Oct 24512 x 536 km, 95.1 min, 97°.5
14:06Sherpa FX-2489582021-059CH2021 Oct 24512 x 535 km, 95.1 min, 97°.5
14:07Tiger 2 (Ayan 21)489442021-059BT2021 Oct 24512 x 534 km, 95.1 min, 97°.5
14:07Hawkeye (Cluster 3 #3)489452021-059BX2021 Oct 24509 x 533 km, 95.0 min, 97°.5
14:08Starlink 3003488792021-059A2021 Oct 24512 x 524 km, 95.0 min, 97°.5
14:08Starlink 3004488802021-059B2021 Oct 24510 x 523 km, 94.9 min, 97°.5
14:08Starlink 3005488812021-059C2021 Oct 24517 x 519 km, 95.0 min, 97°.5
14:32Dragracer (Augury)469552020-085AC2021 Oct 24496 x 513 km, 94.7 min, 97°.4
14:36Electron kick stage469292020-085A2021 Oct 24489 x 504 km, 94.5 min, 97°.4
14:36Corvus BC5469312020-085C2021 Oct 24486 x 507 km, 94.5 min, 97°.4
17:22ANDESITE (nonsensical acronym)457262020-037D2021 Oct 24580 x 602 km, 96.5 min, 97°.7
17:33IRAS137771983-004A2021 Oct 24879 x 905 km, 102.8 min, 99°.0
17:49IRIS (Interface Region Imaging Spectrometer)391972013-033A2021 Oct 24613 x 653 km, 97.4 min, 98°.0
17:55DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2021 Oct 24789 x 798 km, 100.7 min, 98°.6
18:00USA 26 (DMSP 5D-2 F-8)181231987-053A2021 Oct 24820 x 839 km, 101.5 min, 98°.7
18:03TRACE252801998-020A2021 Oct 24508 x 538 km, 95.1 min, 97°.5
18:05Echostar Global 1462672020-059C2021 Oct 24598 x 606 km, 96.7 min, 97°.9
18:07GNOMES 1 (GNSS Navigation and Occultation Measurement Satellites)462662020-059B2021 Oct 24600 x 607 km, 96.8 min, 97°.9
18:32AMS 3 (DMSP 5D-1 F-3)108201978-042A2021 Oct 24767 x 781 km, 100.3 min, 98°.5
18:53DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2021 Oct 24774 x 851 km, 101.1 min, 98°.8
19:06DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2021 Oct 24769 x 828 km, 100.8 min, 98°.7
20:13USA 216 (SBSS)371682010-048A2021 Oct 24623 x 626 km, 97.2 min, 97°.8
20:18DMSP 5A F-1 (Defense Meteorological Satellite Program)32661968-042A2021 Oct 24802 x 880 km, 101.7 min, 98°.7
20:33DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2021 Oct 24764 x 828 km, 100.8 min, 98°.7
20:44DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2021 Oct 24815 x 871 km, 101.8 min, 98°.8
22:55Kepler 06 (Rocinante)479552021-022Z2021 Oct 24534 x 562 km, 95.6 min, 97°.5
22:59SECOR 13 (EGRS 13)38911969-037B2021 Oct 241068 x 1129 km, 107.2 min, 99°.8
23:05Nimbus 6 (Nimbus F)79241975-052A2021 Oct 241101 x 1113 km, 107.4 min, 100°.1
23:11Nimbus 3 (Nimbus B2)38901969-037A2021 Oct 241070 x 1130 km, 107.3 min, 99°.9
23:23Nimbus 5 (Nimbus E)63051972-097A2021 Oct 241088 x 1100 km, 107.1 min, 99°.9
23:28TOPO 143631970-025B2021 Oct 241083 x 1086 km, 106.9 min, 99°.9
23:48Nimbus 4 (Nimbus D)43621970-025A2021 Oct 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 their observing, and particularly to Mike McCants for archiving the derived orbits.

Updated: 2021 Oct 25, 01:47 UTC

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