The Dexes / Satellite Decay / 54752
CelestialObjectDex · Satellite Decay
SHIYAN-21 (SY-21)
54752 · 2026-04-03T15:04:47Z
Fixes
269
Observations
269
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T15:04:47.673984+00:00 |
|---|---|
| end_utc | 2026-08-07T10:10:43.992192+00:00 |
| family | celestialdex |
| norad_id | 54,752 |
| object_name | SHIYAN-21 (SY-21) |
| group | active |
| eccentricity_median | 0.002 |
| inclination_deg_median | 35.981 |
| n_snaps | 269 |
| span_days | 125.796 |
| mean_motion_first | 15.278 |
| mean_motion_last | 15.277 |
| delta_mean_motion | -0.001 |
| altitude_first_km | 482.518 |
| altitude_last_km | 482.698 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 0.017 |
| decay_note | mean_motion slope (rev/day^2) and altitude slope (km/day) from least-squares fit of measured GP elements; altitude from Kepler a=(GM/n^2)^(1/3) - R_earth |
| first_utc | 2026-04-03T15:04:47.673984+00:00 |
| last_utc | 2026-08-07T10:10:43.992192+00:00 |
| last_fix_utc | 2026-08-07T10:10:43.992192+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T15:04:47.673984+00:00","mean_motion":15.27757305,"altitude_km":482.518,"eccentricity":0.00209139,"inclination_deg":35.9765},{"utc":"2026-04-04T06:45:50.780736+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/54752.json