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Orbits


Tyneside, UK
2021 Oct 28
Thursday, Day 301

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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
00:05Perseus-M 1400392014-033AF2021 Oct 27599 x 620 km, 96.9 min, 97°.9
00:12Perseus-M 2400372014-033AD2021 Oct 27597 x 619 km, 96.9 min, 97°.9
00:32ESSA 220911966-016A2021 Oct 271354 x 1415 km, 113.4 min, 101°.2
01:04Amsat Echo (AO-51)283752004-025K2021 Oct 27693 x 811 km, 99.9 min, 98°.5
01:22Kepler 04 (Antilles)464982020-068N2021 Oct 27548 x 567 km, 95.8 min, 97°.7
01:22Kepler 05 (Amidala)464992020-068P2021 Oct 27548 x 567 km, 95.8 min, 97°.7
01:24NOAA 20 (JPSS 1)430132017-073A2021 Oct 27826 x 828 km, 101.4 min, 98°.7
01:25Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2021 Oct 27827 x 827 km, 101.4 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2021 Oct 27702 x 703 km, 98.8 min, 98°.2
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2021 Oct 27701 x 704 km, 98.8 min, 98°.2
01:44Aura (EOS Chem-1)283762004-026A2021 Oct 27702 x 703 km, 98.8 min, 98°.2
01:51NOAA 17 (NOAA M)274532002-032A2021 Oct 27800 x 816 km, 101.0 min, 98°.6
02:41ESSA 836151968-114A2021 Oct 271414 x 1464 km, 114.6 min, 101°.5
02:42Oscar 8 (AO-8)107031978-026B2021 Oct 27892 x 901 km, 102.9 min, 99°.1
03:09El Camino Real (Momentus-X1)444082019-038Y2021 Oct 27512 x 543 km, 95.2 min, 97°.6
03:20NOAA 5 (ITOS H)90571976-077A2021 Oct 271509 x 1524 km, 116.3 min, 102°.1
03:54NOAA 4 (ITOS G)75291974-089A2021 Oct 271444 x 1458 km, 114.9 min, 101°.9
03:55Oscar 7 (AO-7)75301974-089B2021 Oct 271440 x 1459 km, 114.9 min, 101°.9
04:02NOAA 3 (ITOS F)69201973-086A2021 Oct 271500 x 1510 km, 116.1 min, 102°.2
04:19USA 210 (DMSP 5D-3 F-18)359512009-057A2021 Oct 27839 x 856 km, 101.9 min, 98°.7
04:40NOAA 10 (NOAA G)169691986-073A2021 Oct 27790 x 806 km, 100.8 min, 98°.5
04:44NOAA 8 (NOAA E)139231983-022A2021 Oct 27785 x 807 km, 100.8 min, 98°.7
05:43NOAA 12 (NOAA D)212631991-032A2021 Oct 27796 x 814 km, 101.0 min, 98°.5
05:50USA 109 (DMSP 5D-2 F-13)235331995-015A2021 Oct 27835 x 843 km, 101.7 min, 98°.8
05:58SMAP (Soil Moisture Active Passive)403762015-003A2021 Oct 27682 x 683 km, 98.4 min, 98°.1
06:03USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Oct 27838 x 853 km, 101.8 min, 98°.7
06:07QuakeSat278452003-031F2021 Oct 27810 x 824 km, 101.2 min, 98°.7
06:08Coriolis276402003-001A2021 Oct 27818 x 839 km, 101.5 min, 98°.7
06:17COBE203221989-089A2021 Oct 27870 x 884 km, 102.5 min, 98°.9
06:34USA 191 (DMSP 5D-3 F-17)295222006-050A2021 Oct 27839 x 852 km, 101.8 min, 98°.8
07:11USA 73 (DMSP 5D-2 F-11)217981991-082A2021 Oct 27827 x 847 km, 101.6 min, 98°.9
07:26NOAA 15 (NOAA K)253381998-030A2021 Oct 27798 x 812 km, 101.0 min, 98°.7
07:54WISE (Wide Field IR Explorer)361192009-071A2021 Oct 27469 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 27823 x 839 km, 101.5 min, 98°.7
09:30Kepler 15 (SudoRMRF)474612021-006BA2021 Oct 27523 x 535 km, 95.2 min, 97°.5
09:31Kepler 13 (Lucky)475442021-006AT2021 Oct 27521 x 533 km, 95.2 min, 97°.5
09:32Kepler 12 (Boba)474462021-006AK2021 Oct 27518 x 533 km, 95.1 min, 97°.5
09:32Kepler 08 (Amarok)474762021-006BR2021 Oct 27522 x 535 km, 95.2 min, 97°.5
09:32Kepler 11 (Daneel)475032021-006CU2021 Oct 27521 x 535 km, 95.2 min, 97°.5
09:32XR-1475072021-006CY2021 Oct 27521 x 535 km, 95.2 min, 97°.5
09:32Kepler 09 (Artemis)475312021-006DX2021 Oct 27522 x 535 km, 95.2 min, 97°.5
09:33Capella 4474812021-006BW2021 Oct 27515 x 529 km, 95.1 min, 97°.5
09:33Kepler 10 (Baby Yoda)475012021-006CS2021 Oct 27518 x 533 km, 95.2 min, 97°.5
09:34Capella 3474892021-006CE2021 Oct 27516 x 529 km, 95.1 min, 97°.5
09:36Starlink 2199474132021-006A2021 Oct 27520 x 526 km, 95.1 min, 97°.5
09:40USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2021 Oct 25268 x 1011 km, 97.5 min, 97°.9
09:43NOAA 16 (NOAA L)265362000-055A2021 Oct 27840 x 857 km, 101.9 min, 98°.7
09:44Orbcomm-X (Orbcomm-X)215761991-050C2021 Oct 27751 x 755 km, 99.9 min, 98°.5
09:55ITOS 143201970-008A2021 Oct 271434 x 1478 km, 115.0 min, 101°.6
09:55NOAA 1 (ITOS A)47931970-106A2021 Oct 271423 x 1473 km, 114.8 min, 101°.6
09:56Skysat 7 (Skysat C5)417722016-058C2021 Oct 27490 x 492 km, 94.4 min, 97°.3
10:01Skysat 6 (Skysat C4)417712016-058B2021 Oct 27445 x 448 km, 93.5 min, 97°.2
10:02Skysat 5 (Skysat C3)417742016-058E2021 Oct 27445 x 448 km, 93.5 min, 97°.2
10:02SkySat 15 (Skysat C13)438022018-099AW2021 Oct 27457 x 466 km, 93.8 min, 97°.2
10:03Skysat 4 (Skysat C2)417732016-058D2021 Oct 27445 x 447 km, 93.5 min, 97°.2
10:07Skysat 14 (Skysat C12)437972018-099AR2021 Oct 27446 x 447 km, 93.5 min, 97°.2
10:07Cesium 1A492612021-088B2021 Oct 27549 x 582 km, 96.0 min, 97°.6
10:07Cesium 1B492622021-088C2021 Oct 27549 x 581 km, 96.0 min, 97°.6
10:07CUTE (Colorado Ultraviolet Transit Experiment)492632021-088D2021 Oct 27549 x 575 km, 95.9 min, 97°.6
10:07CuPID (Cusp Plasma Imaging Detector)492642021-088E2021 Oct 27549 x 574 km, 95.9 min, 97°.6
10:08Global-2438122018-099BG2021 Oct 27571 x 589 km, 96.3 min, 97°.6
10:11Landsat 9492602021-088A2021 Oct 27690 x 694 km, 98.6 min, 98°.2
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2021 Oct 27701 x 704 km, 98.8 min, 98°.2
10:13STPSat-5437622018-099E2021 Oct 27569 x 587 km, 96.2 min, 97°.7
10:20ION mk01 SCV LUCAS (In Orbit Now Satellite Carrier Vehicle)462742020-061C2021 Oct 27515 x 522 km, 95.0 min, 97°.4
10:20Echostar Global 2462952020-061Z2021 Oct 27529 x 532 km, 95.2 min, 97°.5
10:21Corvus BC3431182018-004H2021 Oct 27484 x 500 km, 94.4 min, 97°.4
10:21Athena462752020-061D2021 Oct 27516 x 517 km, 95.0 min, 97°.4
10:21Kepler 03 (Tars)463192020-061AZ2021 Oct 27530 x 532 km, 95.2 min, 97°.5
10:25Terra (EOS AM-1)259941999-068A2021 Oct 27702 x 703 km, 98.8 min, 98°.2
10:26Arkyd 6A431302018-004V2021 Oct 27481 x 496 km, 94.4 min, 97°.4
10:28WorldView 2359462009-055A2021 Oct 27765 x 767 km, 100.2 min, 98°.5
10:29Geoeye 1333312008-042A2021 Oct 27674 x 684 km, 98.3 min, 98°.1
10:29Worldview 3401152014-048A2021 Oct 27611 x 615 km, 97.0 min, 97°.8
10:31Skysat 1394182013-066C2021 Oct 27556 x 582 km, 96.0 min, 97°.6
10:33LKW-2 (Land Survey Satellite 2)430802017-084A2021 Oct 27491 x 499 km, 94.5 min, 97°.3
10:37Skysat 3 (Skysat C1)416012016-040C2021 Oct 27444 x 447 km, 93.5 min, 97°.2
10:38CICERO 7 (Community Initiative for Cellular Earth Remote Observation)431432018-004AJ2021 Oct 27475 x 486 km, 94.2 min, 97°.4
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 27444 x 445 km, 93.5 min, 97°.3
13:18Skysat 13 (Skysat C11)429872017-068A2021 Oct 27437 x 451 km, 93.5 min, 97°.3
13:18Skysat 12 (Skysat C10)429882017-068B2021 Oct 27441 x 447 km, 93.5 min, 97°.3
13:20Skysat 10 (Skysat C8)429902017-068D2021 Oct 27442 x 445 km, 93.5 min, 97°.3
13:20Skysat 9 (Skysat C7)429912017-068E2021 Oct 27442 x 445 km, 93.5 min, 97°.3
13:21Skysat 8 (Skysat C6)429922017-068F2021 Oct 27444 x 444 km, 93.5 min, 97°.3
13:28WorldView 1320602007-041A2021 Oct 27490 x 494 km, 94.5 min, 97°.4
13:29TIROS 1014301965-051A2021 Oct 27716 x 798 km, 100.0 min, 98°.4
13:29OrbView-2248831997-037A2021 Oct 27777 x 782 km, 100.4 min, 98°.7
13:38ACRIMSat (Active Cavity Radiometer Irradiance Monitor Satellite)260331999-070B2021 Oct 27665 x 705 km, 98.5 min, 98°.1
14:03TOMS-EP239401996-037A2021 Oct 27687 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 27521 x 535 km, 95.2 min, 97°.5
14:05YAM 3 (Yet Another Mission)489152021-059AN2021 Oct 27519 x 536 km, 95.2 min, 97°.5
14:06YAM 2 (Yet Another Mission)489112021-059AJ2021 Oct 27520 x 536 km, 95.2 min, 97°.5
14:06Hawkeye (Cluster 3 #2)489312021-059BE2021 Oct 27513 x 535 km, 95.1 min, 97°.5
14:06Lynk 06 (Shannon)489382021-059BM2021 Oct 27512 x 535 km, 95.1 min, 97°.5
14:06Sherpa LTE-1489412021-059BQ2021 Oct 27511 x 536 km, 95.1 min, 97°.5
14:06Tenzing (Tanker-001)489512021-059CA2021 Oct 27513 x 536 km, 95.1 min, 97°.5
14:06Arthur 1489532021-059CC2021 Oct 27512 x 533 km, 95.1 min, 97°.5
14:06Hawkeye (Cluster 3 #1)489572021-059CG2021 Oct 27512 x 536 km, 95.1 min, 97°.5
14:06Sherpa FX-2489582021-059CH2021 Oct 27512 x 536 km, 95.1 min, 97°.5
14:07Tiger 2 (Ayan 21)489442021-059BT2021 Oct 27512 x 534 km, 95.1 min, 97°.5
14:07Hawkeye (Cluster 3 #3)489452021-059BX2021 Oct 27508 x 533 km, 95.0 min, 97°.5
14:08Starlink 3003488792021-059A2021 Oct 27512 x 524 km, 95.0 min, 97°.5
14:08Starlink 3004488802021-059B2021 Oct 27510 x 523 km, 95.0 min, 97°.5
14:08Starlink 3005488812021-059C2021 Oct 27517 x 519 km, 95.0 min, 97°.5
14:32Dragracer (Augury)469552020-085AC2021 Oct 27496 x 513 km, 94.7 min, 97°.4
14:36Electron kick stage469292020-085A2021 Oct 27488 x 505 km, 94.5 min, 97°.4
14:36Corvus BC5469312020-085C2021 Oct 27486 x 507 km, 94.5 min, 97°.4
17:22ANDESITE (nonsensical acronym)457262020-037D2021 Oct 27580 x 602 km, 96.5 min, 97°.7
17:33IRAS137771983-004A2021 Oct 27879 x 905 km, 102.8 min, 99°.0
17:49IRIS (Interface Region Imaging Spectrometer)391972013-033A2021 Oct 27613 x 653 km, 97.4 min, 98°.0
17:55DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2021 Oct 27789 x 798 km, 100.7 min, 98°.6
18:00USA 26 (DMSP 5D-2 F-8)181231987-053A2021 Oct 27820 x 839 km, 101.5 min, 98°.7
18:03TRACE252801998-020A2021 Oct 27508 x 538 km, 95.1 min, 97°.5
18:05Echostar Global 1462672020-059C2021 Oct 27598 x 606 km, 96.7 min, 97°.9
18:07GNOMES 1 (GNSS Navigation and Occultation Measurement Satellites)462662020-059B2021 Oct 27600 x 607 km, 96.8 min, 97°.9
18:32AMS 3 (DMSP 5D-1 F-3)108201978-042A2021 Oct 27767 x 780 km, 100.3 min, 98°.5
18:53DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2021 Oct 27774 x 851 km, 101.1 min, 98°.8
19:07DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2021 Oct 27769 x 828 km, 100.8 min, 98°.7
20:13USA 216 (SBSS)371682010-048A2021 Oct 27622 x 626 km, 97.2 min, 97°.8
20:18DMSP 5A F-1 (Defense Meteorological Satellite Program)32661968-042A2021 Oct 27802 x 880 km, 101.7 min, 98°.7
20:33DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2021 Oct 27764 x 828 km, 100.8 min, 98°.7
20:44DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2021 Oct 27815 x 871 km, 101.8 min, 98°.8
22:55Kepler 06 (Rocinante)479552021-022Z2021 Oct 27534 x 562 km, 95.6 min, 97°.5
22:58SECOR 13 (EGRS 13)38911969-037B2021 Oct 271068 x 1129 km, 107.2 min, 99°.8
23:05Nimbus 6 (Nimbus F)79241975-052A2021 Oct 271101 x 1113 km, 107.4 min, 100°.1
23:11Nimbus 3 (Nimbus B2)38901969-037A2021 Oct 271070 x 1130 km, 107.3 min, 99°.9
23:23Nimbus 5 (Nimbus E)63051972-097A2021 Oct 271088 x 1100 km, 107.1 min, 99°.9
23:28TOPO 143631970-025B2021 Oct 271083 x 1086 km, 106.9 min, 99°.9
23:48Nimbus 4 (Nimbus D)43621970-025A2021 Oct 271086 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 28, 01:47 UTC

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