The Dexes / Satellite Decay / 39509
CelestialObjectDex · Satellite Decay
ATHENA-FIDUS
39509 · 2026-04-03T14:43:03Z
Fixes
263
Observations
263
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T14:43:03.870336+00:00 |
|---|---|
| end_utc | 2026-08-09T17:28:41.230272+00:00 |
| family | celestialdex |
| norad_id | 39,509 |
| object_name | ATHENA-FIDUS |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 0.018 |
| n_snaps | 263 |
| span_days | 128.115 |
| mean_motion_first | 1.003 |
| mean_motion_last | 1.003 |
| delta_mean_motion | 0.000 |
| altitude_first_km | 35787.215 |
| altitude_last_km | 35787.034 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 0.000 |
| 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 | 2026-04-03T14:43:03.870336+00:00 |
| last_utc | 2026-08-09T17:28:41.230272+00:00 |
| last_fix_utc | 2026-08-09T17:28:41.230272+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T14:43:03.870336+00:00","mean_motion":1.00269573,"altitude_km":35787.215,"eccentricity":0.00015061,"inclination_deg":0.0108},{"utc":"2026-04-03T19:51:06.799392+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/39509.json