The Dexes / Satellite Decay / 28737
CelestialObjectDex · Satellite Decay
SJ-7
28737 · 2026-04-03T14:48:55Z
Fixes
210
Observations
210
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T14:48:55.386144+00:00 |
|---|---|
| end_utc | 2026-08-09T16:12:58.248288+00:00 |
| family | celestialdex |
| norad_id | 28,737 |
| object_name | SJ-7 |
| group | active |
| eccentricity_median | 0.002 |
| inclination_deg_median | 97.729 |
| n_snaps | 210 |
| span_days | 128.058 |
| mean_motion_first | 15.205 |
| mean_motion_last | 15.222 |
| delta_mean_motion | 0.018 |
| altitude_first_km | 504.482 |
| altitude_last_km | 499.060 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.044 |
| 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 | 2026-04-03T14:48:55.386144+00:00 |
| last_utc | 2026-08-09T16:12:58.248288+00:00 |
| last_fix_utc | 2026-08-09T16:12:58.248288+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T14:48:55.386144+00:00","mean_motion":15.20450168,"altitude_km":504.482,"eccentricity":0.00144217,"inclination_deg":97.736},{"utc":"2026-04-04T01:52:18.041376+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/28737.json