| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | deb Delta 139 |
| Spacetrack catalog number | 23088 | 12165 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2025 Jun 20 12:21 | 2025 Jun 20 07:44 |
| Time of closest approach (UTC) | 2025 May 18 08:02:25.386 |
| Minimum distance | 13.036 km |
| Height difference | -2.200 km |
| Relative speed | 14.668 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 53.7°S, 178.0°W |
| Height | 864 km |
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