The Dexes / Satellite Decay / 21805
CelestialObjectDex · Satellite Decay
USA 75 (DSP 16)
21805 · 2026-04-03T02:16:38Z
Fixes
42
Observations
42
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T02:16:38.812224+00:00 |
|---|---|
| end_utc | 2026-05-17T11:13:52.258080+00:00 |
| family | celestialdex |
| norad_id | 21,805 |
| object_name | USA 75 (DSP 16) |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 14.030 |
| n_snaps | 42 |
| span_days | 44.373 |
| mean_motion_first | 0.992 |
| mean_motion_last | 0.992 |
| delta_mean_motion | 0.000 |
| altitude_first_km | 36093.446 |
| altitude_last_km | 36093.352 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.037 |
| 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 | 2026-04-03T02:16:38.812224+00:00 |
| last_utc | 2026-05-17T11:13:52.258080+00:00 |
| last_fix_utc | 2026-05-17T11:13:52.258080+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T02:16:38.812224+00:00","mean_motion":0.99187076,"altitude_km":36093.446,"eccentricity":0.00039186,"inclination_deg":14.0444},{"utc":"2026-04-04T03:36:38.691648+00:00","mean_motion" |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/21805.json