Orbital elements of ESSA 4
| Launched | 25 January 1967 |
| Flight ended | – |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 2657 |
| Alternative names |
TOS-B |
| 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 |
| 2026 Mar 06 18:56 | 2026 Mar 04 11:43:56 | 102.0889 | 0.00732 | 17.1209 | 124.5038 | 291.4878 | 12.69889 | 9.243 |
| 2026 Mar 05 18:56 | 2026 Mar 04 11:43:56 | 102.0889 | 0.00732 | 17.1209 | 124.5038 | 291.4878 | 12.69889 | 9.243 |
| 2026 Mar 04 18:57 | 2026 Mar 04 11:43:56 | 102.0889 | 0.00732 | 17.1209 | 124.5038 | 291.4878 | 12.69889 | 9.243 |
| 2026 Mar 03 18:56 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |
| 2026 Mar 02 18:57 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |
| 2026 Mar 01 18:57 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |
| 2026 Feb 28 18:56 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |
| 2026 Feb 27 19:05 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |
| 2026 Feb 26 20:45 | 2026 Feb 26 12:02:20 | 102.0887 | 0.00732 | 16.7020 | 136.1996 | 291.4878 | 12.69889 | 9.243 |