The Dexes / Satellite Decay / 57519
CelestialObjectDex · Satellite Decay
HJ-2F
57519 · 2026-04-03T14:54:37Z
Fixes
312
Observations
312
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T14:54:37.964736+00:00 |
|---|---|
| end_utc | 2026-08-09T21:02:22.756992+00:00 |
| family | celestialdex |
| norad_id | 57,519 |
| object_name | HJ-2F |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 97.385 |
| n_snaps | 312 |
| span_days | 128.255 |
| mean_motion_first | 15.213 |
| mean_motion_last | 15.230 |
| delta_mean_motion | 0.017 |
| altitude_first_km | 502.001 |
| altitude_last_km | 496.791 |
| 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 | 2026-04-03T14:54:37.964736+00:00 |
| last_utc | 2026-08-09T21:02:22.756992+00:00 |
| last_fix_utc | 2026-08-09T21:02:22.756992+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T14:54:37.964736+00:00","mean_motion":15.21272552,"altitude_km":502.001,"eccentricity":0.00070878,"inclination_deg":97.387},{"utc":"2026-04-03T21:13:30.247968+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/57519.json