The Dexes / Satellite Decay / 20776
CelestialObjectDex · Satellite Decay
SKYNET 4C
20776 · 2026-04-02T19:52:27Z
Fixes
181
Observations
181
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-02T19:52:27.318144+00:00 |
|---|---|
| end_utc | 2026-08-09T19:02:04.112160+00:00 |
| family | celestialdex |
| norad_id | 20,776 |
| object_name | SKYNET 4C |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 13.342 |
| n_snaps | 181 |
| span_days | 128.965 |
| mean_motion_first | 1.003 |
| mean_motion_last | 0.986 |
| delta_mean_motion | -0.017 |
| altitude_first_km | 35785.448 |
| altitude_last_km | 36268.499 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 5.488 |
| 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 | 2026-04-02T19:52:27.318144+00:00 |
| last_utc | 2026-08-09T19:02:04.112160+00:00 |
| last_fix_utc | 2026-08-09T19:02:04.112160+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-02T19:52:27.318144+00:00","mean_motion":1.00275876,"altitude_km":35785.448,"eccentricity":0.00035177,"inclination_deg":13.3642},{"utc":"2026-04-03T19:49:59.407392+00:00","mean_motion" |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/20776.json