The Dexes / Satellite Decay / 37931
CelestialObjectDex · Satellite Decay
SHIYAN-4 (SY-4)
37931 · 2026-04-03T15:34:37Z
Fixes
246
Observations
246
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T15:34:37.476768+00:00 |
|---|---|
| end_utc | 2026-08-09T15:56:04.549056+00:00 |
| family | celestialdex |
| norad_id | 37,931 |
| object_name | SHIYAN-4 (SY-4) |
| group | active |
| eccentricity_median | 0.002 |
| inclination_deg_median | 98.695 |
| n_snaps | 246 |
| span_days | 128.015 |
| mean_motion_first | 14.311 |
| mean_motion_last | 14.311 |
| delta_mean_motion | 0.000 |
| altitude_first_km | 788.054 |
| altitude_last_km | 787.903 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.001 |
| 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 | 2026-04-03T15:34:37.476768+00:00 |
| last_utc | 2026-08-09T15:56:04.549056+00:00 |
| last_fix_utc | 2026-08-09T15:56:04.549056+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T15:34:37.476768+00:00","mean_motion":14.31100712,"altitude_km":788.054,"eccentricity":0.0023011,"inclination_deg":98.7012},{"utc":"2026-04-04T01:24:54.722016+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/37931.json