The Dexes / Satellite Decay / 57757
CelestialObjectDex · Satellite Decay
BB4
57757 · 2026-03-31T17:10:43Z
Fixes
221
Sensor hits
0
Observations
221
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-03-31T17:10:43.944960+00:00 |
|---|---|
| end_utc | 2026-08-09T17:16:55.110720+00:00 |
| family | celestialdex |
| norad_id | 57,757 |
| object_name | BB4 |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 81.000 |
| n_snaps | 221 |
| span_days | 131.004 |
| mean_motion_first | 14.121 |
| mean_motion_last | 14.704 |
| delta_mean_motion | 0.582 |
| altitude_first_km | 852.027 |
| altitude_last_km | 659.830 |
| decay_rate_rev_day2 | 0.004 |
| altitude_decay_km_day | -1.463 |
| 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 | 2026-03-31T17:10:43.944960+00:00 |
| last_utc | 2026-08-09T17:16:55.110720+00:00 |
| last_fix_utc | 2026-08-09T17:16:55.110720+00:00 |
| provisional | false |
| track | [{"utc":"2026-03-31T17:10:43.944960+00:00","mean_motion":14.12149186,"altitude_km":852.027,"eccentricity":0.00094379,"inclination_deg":81.0001},{"utc":"2026-04-10T01:17:31.446816+00:00","mean_motion": |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/57757.json