The Dexes / Satellite Decay / 39474
CelestialObjectDex · Satellite Decay
SMDC ONE 2.3
39474 · 2026-04-03T06:03:52Z
Fixes
260
Observations
260
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T06:03:52.034976+00:00 |
|---|---|
| end_utc | 2026-08-09T20:48:40.450176+00:00 |
| family | celestialdex |
| norad_id | 39,474 |
| object_name | SMDC ONE 2.3 |
| group | active |
| eccentricity_median | 0.007 |
| inclination_deg_median | 120.448 |
| n_snaps | 260 |
| span_days | 128.614 |
| mean_motion_first | 15.529 |
| mean_motion_last | 15.820 |
| delta_mean_motion | 0.292 |
| altitude_first_km | 408.369 |
| altitude_last_km | 324.648 |
| decay_rate_rev_day2 | 0.002 |
| altitude_decay_km_day | -0.641 |
| 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 | 2026-04-03T06:03:52.034976+00:00 |
| last_utc | 2026-08-09T20:48:40.450176+00:00 |
| last_fix_utc | 2026-08-09T20:48:40.450176+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T06:03:52.034976+00:00","mean_motion":15.52863961,"altitude_km":408.369,"eccentricity":0.0066758,"inclination_deg":120.451},{"utc":"2026-04-03T18:25:33.278592+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/39474.json