Orbital elements of DELTA 1 DEB
| Launched | 11 June 1975 | 
| Flight ended | – | 
| Launch site | Air Force Western Test Range, California, USA | 
| Owner | United States | 
| NORAD ID | 21388 | 
| 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 Oct 30 18:57 | 2025 Oct 29 05:56:06 | 99.5525 | 0.00724 | 12.2843 | 117.3945 | 11.5327 | 13.50619 | – | 
| 2025 Oct 29 18:57 | 2025 Oct 29 05:56:06 | 99.5525 | 0.00724 | 12.2843 | 117.3945 | 11.5327 | 13.50619 | – | 
| 2025 Oct 28 18:57 | 2025 Oct 23 05:55:14 | 99.5530 | 0.00722 | 11.9002 | 132.2848 | 11.5327 | 13.50619 | – | 
| 2025 Oct 27 18:57 | 2025 Oct 23 05:55:14 | 99.5530 | 0.00722 | 11.9002 | 132.2848 | 11.5327 | 13.50619 | – | 
| 2025 Oct 26 18:57 | 2025 Oct 23 05:55:14 | 99.5530 | 0.00722 | 11.9002 | 132.2848 | 11.5327 | 13.50619 | – | 
| 2025 Oct 25 17:57 | 2025 Oct 23 05:55:14 | 99.5530 | 0.00722 | 11.9002 | 132.2848 | 11.5327 | 13.50619 | – | 
| 2025 Oct 24 17:57 | 2025 Oct 23 05:55:14 | 99.5530 | 0.00722 | 11.9002 | 132.2848 | 11.5327 | 13.50619 | – | 
| 2025 Oct 22 17:56 | 2025 Oct 18 03:09:35 | 99.5536 | 0.00721 | 11.5728 | 144.9956 | 11.5327 | 13.50619 | – | 
| 2025 Oct 21 17:56 | 2025 Oct 18 03:09:35 | 99.5536 | 0.00721 | 11.5728 | 144.9956 | 11.5327 | 13.50619 | – | 
| 2025 Oct 20 17:56 | 2025 Oct 18 03:09:35 | 99.5536 | 0.00721 | 11.5728 | 144.9956 | 11.5327 | 13.50619 | – | 
| 2025 Oct 19 17:56 | 2025 Oct 18 03:09:35 | 99.5536 | 0.00721 | 11.5728 | 144.9956 | 11.5327 | 13.50619 | – | 
| 2025 Oct 18 17:56 | 2025 Oct 18 03:09:35 | 99.5536 | 0.00721 | 11.5728 | 144.9956 | 11.5327 | 13.50619 | – | 
| 2025 Oct 17 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 16 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 15 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 14 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 12 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 11 17:57 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 09 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 08 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 07 17:56 | 2025 Oct 07 05:54:15 | 99.5551 | 0.00717 | 10.8759 | 172.1160 | 11.5327 | 13.50619 | – | 
| 2025 Oct 05 17:56 | 2025 Sep 26 04:58:02 | 99.5571 | 0.00713 | 10.1691 | 199.7958 | 11.5327 | 13.50619 | – | 
| 2025 Oct 04 17:57 | 2025 Sep 26 04:58:02 | 99.5571 | 0.00713 | 10.1691 | 199.7958 | 11.5327 | 13.50619 | – | 
| 2025 Oct 03 17:57 | 2025 Sep 26 04:58:02 | 99.5571 | 0.00713 | 10.1691 | 199.7958 | 11.5327 | 13.50619 | – |