The Dexes / Satellite Decay / 51990
CelestialObjectDex · Satellite Decay
STARLINK-3657
51990 · 2026-04-02T12:37:39Z
Fixes
214
Sensor hits
0
Observations
214
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-02T12:37:39.403200+00:00 |
|---|---|
| end_utc | 2026-08-09T20:00:01.999008+00:00 |
| family | celestialdex |
| norad_id | 51,990 |
| object_name | STARLINK-3657 |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 53.165 |
| n_snaps | 214 |
| span_days | 129.307 |
| mean_motion_first | 15.088 |
| mean_motion_last | 15.353 |
| delta_mean_motion | 0.265 |
| altitude_first_km | 539.739 |
| altitude_last_km | 459.894 |
| decay_rate_rev_day2 | 0.001 |
| altitude_decay_km_day | -0.439 |
| 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 | 2026-04-02T12:37:39.403200+00:00 |
| last_utc | 2026-08-09T20:00:01.999008+00:00 |
| last_fix_utc | 2026-08-09T20:00:01.999008+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-02T12:37:39.403200+00:00","mean_motion":15.08841383,"altitude_km":539.739,"eccentricity":0.00013578,"inclination_deg":53.2158},{"utc":"2026-04-03T17:14:34.436832+00:00","mean_motion": |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/51990.json