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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 - Meteorology by LTDN

This a list of satellites in sun-synchronous orbit shown in the order they lie around the Earth. 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.

Cubesats less than 6U in size are excluded from the list because the vast majority reached space by hitch hiking and their final orbit was not important. Listing them would create an unnecessarily long page.

The menu on the left leads to some, hopefully useful, sub-lists of the satellites on this page.


LTDN Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
00:32ESSA 220911966-016A2021 Oct 271354 x 1415 km, 113.4 min, 101°.2
01:24NOAA 20 (JPSS 1)430132017-073A2021 Oct 27826 x 828 km, 101.4 min, 98°.7
01:41Fengyun 3D430102017-072A2021 Oct 27824 x 828 km, 101.4 min, 98°.8
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
02:50Meteor M2-2443872019-038A2021 Oct 27812 x 813 km, 101.1 min, 98°.7
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
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
05:40Fengyun 3E490082021-062A2021 Oct 27825 x 827 km, 101.4 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
06:03USA 249 (DMSP 5D-3 F-19)396302014-015A2021 Oct 27838 x 853 km, 101.8 min, 98°.7
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
09:15TIROS-N110601978-096A2021 Oct 27823 x 839 km, 101.5 min, 98°.7
09:30MetOp-B387712012-049A2021 Oct 27819 x 821 km, 101.3 min, 98°.7
09:31MetOp-C436892018-087A2021 Oct 27818 x 822 km, 101.3 min, 98°.7
09:43NOAA 16 (NOAA L)265362000-055A2021 Oct 27840 x 857 km, 101.9 min, 98°.7
09:55NOAA 1 (ITOS A)47931970-106A2021 Oct 271423 x 1473 km, 114.8 min, 101°.6
13:29TIROS 1014301965-051A2021 Oct 27716 x 798 km, 100.0 min, 98°.4
15:04Meteor 3M-1 (Meteor-3M 17Ф45 № 101)270012001-056A2021 Oct 27994 x 1013 km, 105.2 min, 99°.6
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
18:32AMS 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
20:18DMSP 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
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
23:48Nimbus 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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