The Dexes / Satellite Decay / 40143
CelestialObjectDex · Satellite Decay
YAOGAN-21
40143 · 2026-04-03T14:20:36Z
Fixes
317
Observations
317
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T14:20:36.000960+00:00 |
|---|---|
| end_utc | 2026-08-09T20:11:26.203200+00:00 |
| family | celestialdex |
| norad_id | 40,143 |
| object_name | YAOGAN-21 |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 97.148 |
| n_snaps | 317 |
| span_days | 128.244 |
| mean_motion_first | 15.253 |
| mean_motion_last | 15.270 |
| delta_mean_motion | 0.017 |
| altitude_first_km | 489.765 |
| altitude_last_km | 484.672 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.041 |
| 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 | 2026-04-03T14:20:36.000960+00:00 |
| last_utc | 2026-08-09T20:11:26.203200+00:00 |
| last_fix_utc | 2026-08-09T20:11:26.203200+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T14:20:36.000960+00:00","mean_motion":15.25339874,"altitude_km":489.765,"eccentricity":0.0008265,"inclination_deg":97.1561},{"utc":"2026-04-03T20:38:28.053024+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/40143.json