The Dexes / Satellite Decay / 63833
CelestialObjectDex · Satellite Decay
HERMES-4
63833 · 2026-04-03T05:28:36Z
Fixes
177
Observations
177
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T05:28:36.664032+00:00 |
|---|---|
| end_utc | 2026-08-09T16:39:48.798720+00:00 |
| family | celestialdex |
| norad_id | 63,833 |
| object_name | HERMES-4 |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 97.389 |
| n_snaps | 177 |
| span_days | 128.466 |
| mean_motion_first | 15.278 |
| mean_motion_last | 15.315 |
| delta_mean_motion | 0.037 |
| altitude_first_km | 482.399 |
| altitude_last_km | 471.345 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.090 |
| 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 | 2026-04-03T05:28:36.664032+00:00 |
| last_utc | 2026-08-09T16:39:48.798720+00:00 |
| last_fix_utc | 2026-08-09T16:39:48.798720+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T05:28:36.664032+00:00","mean_motion":15.27797291,"altitude_km":482.399,"eccentricity":0.0004844,"inclination_deg":97.397},{"utc":"2026-04-03T16:28:48.222336+00:00","mean_motion":15 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/63833.json