Orbital elements of YAOGAN-21
| Launched | 7 September 2014 |
| Flight ended | – |
| Launch site | Taiyuan Space Center, PRC |
| Owner | People's Republic of China |
| NORAD ID | 40143 |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| 2025 Sep 12 17:57 | 2025 Sep 11 22:35:40 | 97.1904 | 0.00142 | 20.1430 | 39.2496 | 320.9765 | 15.23431 | – |
| 2025 Sep 11 17:57 | 2025 Sep 11 06:49:49 | 97.1904 | 0.00142 | 20.1011 | 41.4074 | 320.9765 | 15.23431 | – |
| 2025 Sep 10 17:56 | 2025 Sep 10 07:11:03 | 97.1905 | 0.00143 | 20.0381 | 44.6075 | 320.9765 | 15.23431 | – |
| 2025 Sep 08 17:57 | 2025 Sep 08 06:18:52 | 97.1914 | 0.00145 | 19.9081 | 51.2045 | 320.9765 | 15.23431 | – |
| 2025 Sep 07 17:56 | 2025 Sep 07 06:40:03 | 97.1918 | 0.00146 | 19.8451 | 54.3639 | 320.9765 | 15.23431 | – |
| 2025 Sep 06 20:41 | 2025 Sep 06 07:01:13 | 97.1923 | 0.00147 | 19.7821 | 57.4193 | 320.9765 | 15.23431 | – |
| 2025 Sep 03 17:57 | 2025 Sep 03 08:05:08 | 97.1930 | 0.00125 | 19.5932 | 75.2786 | 320.9765 | 15.23431 | – |
| 2025 Sep 02 17:56 | 2025 Sep 02 06:52:20 | 97.1929 | 0.00125 | 19.5260 | 78.3052 | 320.9765 | 15.23431 | – |
| 2025 Sep 01 17:56 | 2025 Sep 01 07:14:04 | 97.1927 | 0.00126 | 19.4630 | 81.4210 | 320.9765 | 15.23431 | – |
| 2025 Aug 31 17:56 | 2025 Aug 31 07:35:46 | 97.1927 | 0.00127 | 19.4001 | 84.4437 | 320.9765 | 15.23431 | – |
| 2025 Aug 30 17:56 | 2025 Aug 30 07:57:27 | 97.1927 | 0.00127 | 19.3371 | 87.4639 | 320.9765 | 15.23431 | – |
| 2025 Aug 29 17:56 | 2025 Aug 29 06:44:33 | 97.1925 | 0.00127 | 19.2699 | 90.5518 | 320.9765 | 15.23431 | – |
| 2025 Aug 28 17:57 | 2025 Aug 27 23:13:23 | 97.1926 | 0.00128 | 19.1859 | 94.5814 | 320.9765 | 15.23431 | – |
| 2025 Aug 27 17:56 | 2025 Aug 27 07:27:48 | 97.1926 | 0.00128 | 19.1439 | 96.5962 | 320.9765 | 15.23431 | – |
| 2025 Aug 26 17:56 | 2025 Aug 25 22:22:02 | 97.1929 | 0.00128 | 19.0558 | 100.7373 | 320.9765 | 15.23431 | – |
| 2025 Aug 25 17:56 | 2025 Aug 24 22:43:37 | 97.1932 | 0.00128 | 18.9928 | 103.6733 | 320.9765 | 15.23431 | – |
| 2025 Aug 24 17:56 | 2025 Aug 23 23:05:11 | 97.1936 | 0.00128 | 18.9298 | 106.6251 | 320.9765 | 15.23431 | – |
| 2025 Aug 23 17:56 | 2025 Aug 22 13:59:22 | 97.1940 | 0.00128 | 18.8416 | 110.7260 | 320.9765 | 15.23431 | – |
| 2025 Aug 22 17:56 | 2025 Aug 20 21:00:42 | 97.1947 | 0.00128 | 18.7324 | 115.9752 | 320.9765 | 15.23431 | – |
| 2025 Aug 20 17:56 | 2025 Aug 20 11:33:18 | 97.1948 | 0.00127 | 18.7072 | 117.1171 | 320.9765 | 15.23431 | – |
| 2025 Aug 19 17:56 | 2025 Aug 19 11:54:49 | 97.1948 | 0.00127 | 18.6442 | 120.0743 | 320.9765 | 15.23431 | – |
| 2025 Aug 18 17:56 | 2025 Aug 18 12:16:19 | 97.1948 | 0.00126 | 18.5812 | 123.0605 | 320.9765 | 15.23431 | – |