The Dexes / Satellite Decay / 37818
CelestialObjectDex · Satellite Decay
TACSAT 4
37818 · 2026-04-03T03:49:57Z
Fixes
144
Observations
144
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T03:49:57.671328+00:00 |
|---|---|
| end_utc | 2026-08-07T21:17:47.895360+00:00 |
| family | celestialdex |
| norad_id | 37,818 |
| object_name | TACSAT 4 |
| group | active |
| eccentricity_median | 0.463 |
| inclination_deg_median | 62.825 |
| n_snaps | 144 |
| span_days | 126.728 |
| mean_motion_first | 6.152 |
| mean_motion_last | 6.157 |
| delta_mean_motion | 0.004 |
| altitude_first_km | 6202.668 |
| altitude_last_km | 6196.716 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.047 |
| 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 | 2026-04-03T03:49:57.671328+00:00 |
| last_utc | 2026-08-07T21:17:47.895360+00:00 |
| last_fix_utc | 2026-08-07T21:17:47.895360+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T03:49:57.671328+00:00","mean_motion":6.15233713,"altitude_km":6202.668,"eccentricity":0.46265472,"inclination_deg":62.8143},{"utc":"2026-04-04T03:14:16.947168+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/37818.json