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Orbits


Tyneside, UK
2021 Dec 8
Wednesday, Day 342

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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
00:06Perseus-M 1400392014-033AF2021 Dec 7599 x 619 km, 96.9 min, 97°.9
00:13Perseus-M 2400372014-033AD2021 Dec 7598 x 618 km, 96.9 min, 97°.9
00:31ESSA 220911966-016A2021 Dec 71354 x 1415 km, 113.4 min, 101°.2
01:05Amsat Echo (AO-51)283752004-025K2021 Dec 7692 x 811 km, 99.9 min, 98°.5
01:24NOAA 20 (JPSS 1)430132017-073A2021 Dec 7826 x 827 km, 101.4 min, 98°.7
01:24Kepler 04 (Antilles)464982020-068N2021 Dec 7548 x 565 km, 95.8 min, 97°.7
01:24Kepler 05 (Amidala)464992020-068P2021 Dec 7548 x 565 km, 95.8 min, 97°.7
01:25Suomi NPP (Suomi National Polar-orbiting Partnership)378492011-061A2021 Dec 7826 x 828 km, 101.4 min, 98°.7
01:35Aqua (EOS PM-1)274242002-022A2021 Dec 7701 x 704 km, 98.8 min, 98°.2
01:36OCO 2 (Orbiting Carbon Observatory)400592014-035A2021 Dec 7702 x 703 km, 98.8 min, 98°.2
01:44Aura (EOS Chem-1)283762004-026A2021 Dec 7702 x 703 km, 98.8 min, 98°.2
01:51NOAA 17 (NOAA M)274532002-032A2021 Dec 7799 x 817 km, 101.0 min, 98°.6
02:38ESSA 836151968-114A2021 Dec 71414 x 1463 km, 114.6 min, 101°.5
02:44Oscar 8 (AO-8)107031978-026B2021 Dec 7891 x 901 km, 102.9 min, 99°.1
03:11El Camino Real (Momentus-X1)444082019-038Y2021 Dec 7510 x 544 km, 95.2 min, 97°.6
03:21NOAA 5 (ITOS H)90571976-077A2021 Dec 71508 x 1524 km, 116.3 min, 102°.1
03:57NOAA 4 (ITOS G)75291974-089A2021 Dec 71444 x 1458 km, 114.9 min, 101°.9
03:57Oscar 7 (AO-7)75301974-089B2021 Dec 71439 x 1459 km, 114.9 min, 101°.9
04:04NOAA 3 (ITOS F)69201973-086A2021 Dec 71500 x 1510 km, 116.1 min, 102°.2
04:17USA 210 (DMSP 5D-3 F-18)359512009-057A2021 Dec 7840 x 855 km, 101.9 min, 98°.7
04:39NOAA 10 (NOAA G)169691986-073A2021 Dec 7789 x 807 km, 100.8 min, 98°.5
04:46NOAA 8 (NOAA E)139231983-022A2021 Dec 7784 x 807 km, 100.8 min, 98°.7
05:41NOAA 12 (NOAA D)212631991-032A2021 Dec 7795 x 815 km, 101.0 min, 98°.5
05:51USA 109 (DMSP 5D-2 F-13)235331995-015A2021 Dec 7834 x 844 km, 101.7 min, 98°.8
05:58SMAP (Soil Moisture Active Passive)403762015-003A2021 Dec 7681 x 684 km, 98.4 min, 98°.1
06:01USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Dec 7839 x 853 km, 101.8 min, 98°.7
06:06QuakeSat278452003-031F2021 Dec 7811 x 823 km, 101.2 min, 98°.7
06:08Coriolis276402003-001A2021 Dec 7819 x 838 km, 101.5 min, 98°.7
06:16COBE203221989-089A2021 Dec 7870 x 883 km, 102.5 min, 98°.9
06:34USA 191 (DMSP 5D-3 F-17)295222006-050A2021 Dec 7838 x 853 km, 101.8 min, 98°.8
07:13USA 73 (DMSP 5D-2 F-11)217981991-082A2021 Dec 7828 x 846 km, 101.6 min, 98°.9
07:27NOAA 15 (NOAA K)253381998-030A2021 Dec 7797 x 813 km, 101.0 min, 98°.7
07:53WISE (Wide Field IR Explorer)361192009-071A2021 Dec 7471 x 472 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
08:44USA 106 (DMSP 5D-2 S-12)232331994-057A2021 Dec 7833 x 847 km, 101.7 min, 98°.9
09:14TIROS-N110601978-096A2021 Dec 7824 x 838 km, 101.5 min, 98°.7
09:29Kepler 15 (SudoRMRF)474612021-006BA2021 Dec 7524 x 533 km, 95.2 min, 97°.5
09:30Kepler 13 (Lucky)475442021-006AT2021 Dec 7521 x 531 km, 95.2 min, 97°.5
09:31Kepler 08 (Amarok)474762021-006BR2021 Dec 7523 x 533 km, 95.2 min, 97°.5
09:31Kepler 11 (Daneel)475032021-006CU2021 Dec 7522 x 533 km, 95.2 min, 97°.5
09:31XR-1475072021-006CY2021 Dec 7521 x 533 km, 95.2 min, 97°.5
09:31Kepler 09 (Artemis)475312021-006DX2021 Dec 7523 x 533 km, 95.2 min, 97°.5
09:32Kepler 12 (Boba)474462021-006AK2021 Dec 7517 x 532 km, 95.1 min, 97°.5
09:33Capella 4474812021-006BW2021 Dec 7514 x 526 km, 95.0 min, 97°.5
09:33Capella 3474892021-006CE2021 Dec 7515 x 526 km, 95.0 min, 97°.5
09:33Kepler 10 (Baby Yoda)475012021-006CS2021 Dec 7518 x 532 km, 95.1 min, 97°.5
09:40USA 245 (KH-11 Block-4 F3?/Crystal)392322013-043A2021 Nov 1267 x 1011 km, 97.5 min, 97°.9
09:41NOAA 16 (NOAA L)265362000-055A2021 Dec 7841 x 856 km, 101.9 min, 98°.7
09:46Orbcomm-X (Orbcomm-X)215761991-050C2021 Dec 7749 x 756 km, 99.9 min, 98°.5
09:53NOAA 1 (ITOS A)47931970-106A2021 Dec 71423 x 1472 km, 114.8 min, 101°.6
09:54ITOS 143201970-008A2021 Dec 71434 x 1478 km, 115.0 min, 101°.6
09:54Skysat 7 (Skysat C5)417722016-058C2021 Dec 7490 x 492 km, 94.4 min, 97°.3
10:00Skysat 6 (Skysat C4)417712016-058B2021 Dec 7444 x 446 km, 93.5 min, 97°.1
10:00SkySat 15 (Skysat C13)438022018-099AW2021 Dec 7458 x 463 km, 93.8 min, 97°.2
10:01Skysat 4 (Skysat C2)417732016-058D2021 Dec 7444 x 446 km, 93.5 min, 97°.1
10:01Skysat 5 (Skysat C3)417742016-058E2021 Dec 7444 x 446 km, 93.5 min, 97°.1
10:05Skysat 14 (Skysat C12)437972018-099AR2021 Dec 7443 x 447 km, 93.5 min, 97°.2
10:06Cesium 1A492612021-088B2021 Dec 7551 x 580 km, 96.0 min, 97°.6
10:06Cesium 1B492622021-088C2021 Dec 7550 x 580 km, 96.0 min, 97°.6
10:06BlackSky 2 (Global 2)438122018-099BG2021 Dec 7570 x 589 km, 96.3 min, 97°.6
10:07CUTE (Colorado Ultraviolet Transit Experiment)492632021-088D2021 Dec 7549 x 574 km, 95.9 min, 97°.6
10:07CuPID (Cusp Plasma Imaging Detector)492642021-088E2021 Dec 7549 x 574 km, 95.9 min, 97°.6
10:12STPSat-5437622018-099E2021 Dec 7568 x 588 km, 96.2 min, 97°.7
10:12Landsat 9492602021-088A2021 Dec 7702 x 703 km, 98.8 min, 98°.2
10:12Landsat 8 (Landsat Data Continuity Mission)390842013-008A2021 Dec 7702 x 703 km, 98.8 min, 98°.2
10:19ION mk01 SCV LUCAS (In Orbit Now Satellite Carrier Vehicle)462742020-061C2021 Dec 7513 x 524 km, 95.0 min, 97°.4
10:19Echostar Global 2462952020-061Z2021 Dec 7527 x 532 km, 95.2 min, 97°.5
10:20Athena462752020-061D2021 Dec 7514 x 518 km, 95.0 min, 97°.4
10:20Kepler 03 (Tars)463192020-061AZ2021 Dec 7527 x 533 km, 95.2 min, 97°.5
10:21Corvus BC3431182018-004H2021 Dec 7485 x 497 km, 94.4 min, 97°.4
10:24Terra (EOS AM-1)259941999-068A2021 Dec 7702 x 703 km, 98.8 min, 98°.2
10:27Arkyd 6A431302018-004V2021 Dec 7482 x 494 km, 94.4 min, 97°.4
10:29WorldView 2359462009-055A2021 Dec 7765 x 767 km, 100.2 min, 98°.5
10:29Skysat 1394182013-066C2021 Dec 7554 x 584 km, 96.0 min, 97°.6
10:29Worldview 3401152014-048A2021 Dec 7612 x 615 km, 97.0 min, 97°.9
10:30Geoeye 1333312008-042A2021 Dec 7672 x 686 km, 98.3 min, 98°.1
10:32LKW-2 (Land Survey Satellite 2)430802017-084A2021 Dec 7492 x 499 km, 94.5 min, 97°.3
10:37Skysat 3 (Skysat C1)416012016-040C2021 Dec 7443 x 446 km, 93.5 min, 97°.2
10:39CICERO 7 (Community Initiative for Cellular Earth Remote Observation)431432018-004AJ2021 Dec 7475 x 483 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
13:17Skysat 11 (Skysat C9)429892017-068C2021 Dec 7441 x 444 km, 93.4 min, 97°.3
13:19Skysat 13 (Skysat C11)429872017-068A2021 Dec 7438 x 448 km, 93.4 min, 97°.3
13:20Skysat 12 (Skysat C10)429882017-068B2021 Dec 7442 x 444 km, 93.4 min, 97°.3
13:21Skysat 10 (Skysat C8)429902017-068D2021 Dec 7442 x 443 km, 93.4 min, 97°.3
13:22Skysat 9 (Skysat C7)429912017-068E2021 Dec 7441 x 444 km, 93.4 min, 97°.3
13:23Skysat 8 (Skysat C6)429922017-068F2021 Dec 7440 x 445 km, 93.4 min, 97°.3
13:27TIROS 1014301965-051A2021 Dec 7717 x 798 km, 100.0 min, 98°.4
13:28WorldView 1320602007-041A2021 Dec 7489 x 494 km, 94.4 min, 97°.4
13:38ACRIMSat (Active Cavity Radiometer Irradiance Monitor Satellite)260331999-070B2021 Dec 7666 x 704 km, 98.5 min, 98°.1
14:04TOMS-EP239401996-037A2021 Dec 7689 x 727 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 Dec 7520 x 535 km, 95.2 min, 97°.5
14:06YAM 2 (Yet Another Mission)489112021-059AJ2021 Dec 7518 x 536 km, 95.2 min, 97°.5
14:06YAM 3 (Yet Another Mission)489152021-059AN2021 Dec 7518 x 536 km, 95.2 min, 97°.5
14:06Hawkeye (Cluster 3 #2)489312021-059BE2021 Dec 7512 x 535 km, 95.1 min, 97°.5
14:07Lynk 06 (Shannon)489382021-059BM2021 Dec 7511 x 536 km, 95.1 min, 97°.5
14:07Sherpa LTE-1489412021-059BQ2021 Dec 7509 x 534 km, 95.1 min, 97°.5
14:07Tiger 2 (Ayan 21)489442021-059BT2021 Dec 7511 x 534 km, 95.1 min, 97°.5
14:07Hawkeye (Cluster 3 #3)489452021-059BX2021 Dec 7506 x 531 km, 95.0 min, 97°.5
14:07Tenzing (Tanker-001)489512021-059CA2021 Dec 7511 x 537 km, 95.1 min, 97°.5
14:07Arthur 1489532021-059CC2021 Dec 7511 x 533 km, 95.1 min, 97°.5
14:07Hawkeye (Cluster 3 #1)489572021-059CG2021 Dec 7511 x 536 km, 95.1 min, 97°.5
14:07Sherpa FX-2489582021-059CH2021 Dec 7511 x 536 km, 95.1 min, 97°.5
14:09Starlink 3003488792021-059A2021 Dec 7513 x 523 km, 95.0 min, 97°.5
14:09Starlink 3004488802021-059B2021 Dec 7515 x 521 km, 95.0 min, 97°.5
14:09Starlink 3005488812021-059C2021 Dec 7515 x 521 km, 95.0 min, 97°.5
14:32Dragracer (Augury)469552020-085AC2021 Dec 7494 x 515 km, 94.7 min, 97°.4
14:36Electron kick stage469292020-085A2021 Dec 7487 x 504 km, 94.5 min, 97°.4
14:37Corvus BC5469312020-085C2021 Dec 7485 x 506 km, 94.5 min, 97°.4
17:21ANDESITE (nonsensical acronym)457262020-037D2021 Dec 7581 x 600 km, 96.5 min, 97°.7
17:32IRAS137771983-004A2021 Dec 7880 x 905 km, 102.8 min, 99°.0
17:50IRIS (Interface Region Imaging Spectrometer)391972013-033A2021 Dec 7614 x 651 km, 97.4 min, 98°.0
17:54DMSP 5D-2 F-6 (Defense Meteorological Satellite Program)137361982-118A2021 Dec 7788 x 800 km, 100.7 min, 98°.6
17:59USA 26 (DMSP 5D-2 F-8)181231987-053A2021 Dec 7821 x 838 km, 101.5 min, 98°.7
18:02TRACE252801998-020A2021 Dec 7506 x 539 km, 95.1 min, 97°.5
18:07Echostar Global 1462672020-059C2021 Dec 7596 x 607 km, 96.7 min, 97°.9
18:08GNOMES 1 (GNSS Navigation and Occultation Measurement Satellites)462662020-059B2021 Dec 7599 x 608 km, 96.8 min, 97°.9
18:33AMS 3 (DMSP 5D-1 F-3)108201978-042A2021 Dec 7767 x 780 km, 100.3 min, 98°.5
18:55DMSP 5C F-2 (Defense Meteorological Satellite Program)78161975-043A2021 Dec 7775 x 850 km, 101.1 min, 98°.8
19:07DMSP 5C F-1 (Defense Meteorological Satellite Program)74111974-063A2021 Dec 7768 x 828 km, 100.8 min, 98°.7
20:12USA 216 (SBSS)371682010-048A2021 Dec 7623 x 625 km, 97.2 min, 97°.8
20:16DMSP 5A F-1 (Defense Meteorological Satellite Program)32661968-042A2021 Dec 7803 x 880 km, 101.7 min, 98°.7
20:34DMSP 5A F-3 (Defense Meteorological Satellite Program)40471969-062A2021 Dec 7763 x 829 km, 100.8 min, 98°.7
20:44DMSP 4A F-9 (Defense Meteorological Satellite Program)29201967-080A2021 Dec 7815 x 871 km, 101.8 min, 98°.8
22:54Kepler 06 (Rocinante)479552021-022Z2021 Dec 7531 x 563 km, 95.6 min, 97°.5
22:57SECOR 13 (EGRS 13)38911969-037B2021 Dec 71069 x 1128 km, 107.2 min, 99°.8
23:07Nimbus 6 (Nimbus F)79241975-052A2021 Dec 71101 x 1112 km, 107.4 min, 100°.1
23:10Nimbus 3 (Nimbus B2)38901969-037A2021 Dec 71070 x 1130 km, 107.3 min, 99°.9
23:23Nimbus 5 (Nimbus E)63051972-097A2021 Dec 71088 x 1100 km, 107.1 min, 99°.9
23:29TOPO 143631970-025B2021 Dec 71083 x 1087 km, 106.9 min, 99°.9
23:49Nimbus 4 (Nimbus D)43621970-025A2021 Dec 71086 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 Dec 8, 02:47 UTC

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