The Dexes / Satellite Decay / 63490
CelestialObjectDex · Satellite Decay
HYDRA-W
63490 · 2026-04-03T06:07:07Z
Fixes
25
Observations
25
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T06:07:07.398336+00:00 |
|---|---|
| end_utc | 2026-04-22T06:20:43.628640+00:00 |
| family | celestialdex |
| norad_id | 63,490 |
| object_name | HYDRA-W |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 97.381 |
| n_snaps | 25 |
| span_days | 19.009 |
| mean_motion_first | 15.779 |
| mean_motion_last | 16.088 |
| delta_mean_motion | 0.309 |
| altitude_first_km | 336.429 |
| altitude_last_km | 250.167 |
| decay_rate_rev_day2 | 0.014 |
| altitude_decay_km_day | -3.896 |
| 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 | 2026-04-03T06:07:07.398336+00:00 |
| last_utc | 2026-04-22T06:20:43.628640+00:00 |
| last_fix_utc | 2026-04-22T06:20:43.628640+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T06:07:07.398336+00:00","mean_motion":15.7788676,"altitude_km":336.429,"eccentricity":0.0006,"inclination_deg":97.3843},{"utc":"2026-04-03T16:46:16.204224+00:00","mean_motion":15.78 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/63490.json