Orbital elements of OPS 6157
| Launched | 11 June 1973 |
| Flight ended | – |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 6691 |
| Alternative names |
DSP 4 |
| 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 18 17:56 | 2025 Sep 14 23:10:40 | 1.5132 | 0.00070 | 16.3456 | 23.0189 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 15 17:56 | 2025 Sep 14 23:10:40 | 1.5132 | 0.00070 | 16.3456 | 23.0189 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 12 17:57 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 11 17:57 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 10 17:56 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 08 17:57 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 07 17:56 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 06 20:41 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 03 17:57 | 2025 Sep 03 06:14:27 | 1.5428 | 0.00061 | 16.3887 | 22.2790 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 02 17:56 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Sep 01 17:56 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 31 17:56 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 30 17:56 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 29 17:56 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 28 17:57 | 2025 Aug 27 18:04:36 | 1.5571 | 0.00060 | 16.4107 | 23.0283 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 27 17:56 | 2025 Aug 23 05:43:38 | 1.5672 | 0.00060 | 16.4262 | 23.3333 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 26 17:56 | 2025 Aug 23 05:43:38 | 1.5672 | 0.00060 | 16.4262 | 23.3333 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 25 17:56 | 2025 Aug 23 05:43:38 | 1.5672 | 0.00060 | 16.4262 | 23.3333 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 24 17:56 | 2025 Aug 23 05:43:38 | 1.5672 | 0.00060 | 16.4262 | 23.3333 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 23 17:56 | 2025 Aug 23 05:43:38 | 1.5672 | 0.00060 | 16.4262 | 23.3333 | 166.6935 | 0.99813 | 5.243 |
| 2025 Aug 22 17:56 | 2025 Aug 17 22:05:17 | 1.5801 | 0.00060 | 16.4446 | 23.2706 | 166.6935 | 0.99813 | 5.243 |