The Dexes / Satellite Decay / 69570
CelestialObjectDex · Satellite Decay
SHIJIAN-31 (SJ-31)
69570 · 2026-06-16T20:21:12Z
Fixes
68
Observations
68
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-06-16T20:21:12.015072+00:00 |
|---|---|
| end_utc | 2026-08-07T11:25:59.347776+00:00 |
| family | celestialdex |
| norad_id | 69,570 |
| object_name | SHIJIAN-31 (SJ-31) |
| group | active |
| eccentricity_median | 0.694 |
| inclination_deg_median | 63.486 |
| n_snaps | 68 |
| span_days | 51.628 |
| mean_motion_first | 2.281 |
| mean_motion_last | 1.922 |
| delta_mean_motion | -0.359 |
| altitude_first_km | 17999.431 |
| altitude_last_km | 20944.702 |
| decay_rate_rev_day2 | -0.006 |
| altitude_decay_km_day | 52.302 |
| 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 | 2026-06-16T20:21:12.015072+00:00 |
| last_utc | 2026-08-07T11:25:59.347776+00:00 |
| last_fix_utc | 2026-08-07T11:25:59.347776+00:00 |
| provisional | false |
| track | [{"utc":"2026-06-16T20:21:12.015072+00:00","mean_motion":2.28095748,"altitude_km":17999.431,"eccentricity":0.7310406,"inclination_deg":63.4649},{"utc":"2026-06-16T20:21:12.015072+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/69570.json