| Primary satellite | Secondary satellite |
| Name | Transit 4A | IRAS |
| Spacetrack catalog number | 116 | 13777 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2026 Jan 15 02:37 | 2026 Jan 15 09:12 |
| Time of closest approach (UTC) | 2025 Dec 21 04:41:52.066 |
| Minimum distance | 6.787 km |
| Height difference | 2.992 km |
| Relative speed | 14.367 km/s |
| Angle between velocity vectors | 150° |
| Geographic position | 57.1°N, 152.9°W |
| Height | 884 km |
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