The Dexes / Satellite Decay / 66515
CelestialObjectDex · Satellite Decay
SZ-21 MODULE
66515 · 2026-05-18T16:03:22Z
Fixes
109
Observations
109
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-05-18T16:03:22.541760+00:00 |
|---|---|
| end_utc | 2026-08-09T14:31:11.284608+00:00 |
| family | celestialdex |
| norad_id | 66,515 |
| object_name | SZ-21 MODULE |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 41.473 |
| n_snaps | 109 |
| span_days | 82.936 |
| mean_motion_first | 15.738 |
| mean_motion_last | 15.813 |
| delta_mean_motion | 0.074 |
| altitude_first_km | 347.982 |
| altitude_last_km | 326.847 |
| decay_rate_rev_day2 | 0.001 |
| altitude_decay_km_day | -0.254 |
| 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 | 2026-05-18T16:03:22.541760+00:00 |
| last_utc | 2026-08-09T14:31:11.284608+00:00 |
| last_fix_utc | 2026-08-09T14:31:11.284608+00:00 |
| provisional | false |
| track | [{"utc":"2026-05-18T16:03:22.541760+00:00","mean_motion":15.73823259,"altitude_km":347.982,"eccentricity":0.0003838,"inclination_deg":41.4718},{"utc":"2026-05-18T23:40:15.240000+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/66515.json