MONITOR-4 (RS57S) is a payload in SSO orbit, operated by Moscow State University, launched 2023.
| Orbit class | SSO |
| Inclination | 97.5064° |
| Eccentricity | 0.0011856 |
| Period | 94.2 min |
| Apogee | 489 km |
| Perigee | 473 km |
| Mean motion | 15.28351604 rev/day |
| RAAN | 251.7181° |
| Arg of perigee | 37.5552° |
| Mean anomaly | 322.6514° |
| B* | 2.8720e-4 |
| Rev at epoch | 16,734 |
1 57182U 23091S 26188.14926705 .00007869 00000-0 28720-3 0 99992 57182 97.5064 251.7181 0011856 37.5552 322.6514 15.28351604167348{
"OBJECT_NAME": "MONITOR-4 (RS57S)",
"OBJECT_ID": "2023-091S",
"EPOCH": "2026-07-07T03:34:56.673+00:00",
"MEAN_MOTION": 15.28351604,
"ECCENTRICITY": 0.0011856,
"INCLINATION": 97.5064,
"RA_OF_ASC_NODE": 251.7181,
"ARG_OF_PERICENTER": 37.5552,
"MEAN_ANOMALY": 322.6514,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 57182,
"REV_AT_EPOCH": 16734,
"BSTAR": 0.0002872,
"MEAN_MOTION_DOT": 0.00007869,
"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 | MONITOR-4 (RS57S) |
| Operator | |
| Country | Russia |
| Launch date | |
| Launch mass (kg) | |
| Mission purpose | — |
| Object class |
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.
| Orbital regime |
| Status |