The Dexes / Satellite Decay / 53251
CelestialObjectDex · Satellite Decay
STARLINK-4129
53251 · 2026-04-03T09:50:08Z
Fixes
195
Observations
195
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T09:50:08.263968+00:00 |
|---|---|
| end_utc | 2026-08-09T07:27:04.525056+00:00 |
| family | celestialdex |
| norad_id | 53,251 |
| object_name | STARLINK-4129 |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 53.165 |
| n_snaps | 195 |
| span_days | 127.901 |
| mean_motion_first | 15.088 |
| mean_motion_last | 15.294 |
| delta_mean_motion | 0.205 |
| altitude_first_km | 539.723 |
| altitude_last_km | 477.735 |
| decay_rate_rev_day2 | 0.002 |
| altitude_decay_km_day | -0.632 |
| 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 | 2026-04-03T09:50:08.263968+00:00 |
| last_utc | 2026-08-09T07:27:04.525056+00:00 |
| last_fix_utc | 2026-08-09T07:27:04.525056+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T09:50:08.263968+00:00","mean_motion":15.08846737,"altitude_km":539.723,"eccentricity":0.00012698,"inclination_deg":53.2169},{"utc":"2026-04-03T16:11:40.685280+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/53251.json