RIGIDSPHERE 2 (LCS 4) is a payload in LEO orbit, operated by United States Army / Lincoln Labs, Mass. Inst of Technology, launched 1971.
| Orbit class | LEO |
| Inclination | 87.6230° |
| Eccentricity | 0.0060569 |
| Period | 100.1 min |
| Apogee | 809 km |
| Perigee | 722 km |
| Mean motion | 14.37894435 rev/day |
| RAAN | 333.2602° |
| Arg of perigee | 164.4970° |
| Mean anomaly | 195.8103° |
| B* | 2.2024e-4 |
| Rev at epoch | 87,675 |
1 05398U 71067E 26188.16473233 .00000697 00000-0 22024-3 0 99952 05398 87.6230 333.2602 0060569 164.4970 195.8103 14.37894435876757{
"OBJECT_NAME": "RIGIDSPHERE 2 (LCS 4)",
"OBJECT_ID": "1971-067E",
"EPOCH": "2026-07-07T03:57:12.873+00:00",
"MEAN_MOTION": 14.37894435,
"ECCENTRICITY": 0.0060569,
"INCLINATION": 87.623,
"RA_OF_ASC_NODE": 333.2602,
"ARG_OF_PERICENTER": 164.497,
"MEAN_ANOMALY": 195.8103,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 5398,
"REV_AT_EPOCH": 87675,
"BSTAR": 0.00022024,
"MEAN_MOTION_DOT": 0.00000697,
"MEAN_MOTION_DDOT": 0
}Reconstructed from CelesTrak OMM mean-elements (element-set number is a placeholder). TLE/OMM data is approximate. Not for operational use or collision avoidance.
| Name | RIGIDSPHERE 2 (LCS 4) |
| Operator | United States Army / Lincoln Labs, Mass. Inst of TechnologyHIGHvia GCAT — Jonathan McDowell's General Catalog |
| Country | United States |
| Launch date | |
| Launch mass (kg) | |
| Mission purpose | — |
| Object class | PAYLOADHIGH |
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.
| Orbital regime |
| Status |