The Dexes / Satellite Decay / 22988
CelestialObjectDex · Satellite Decay
USA 99 (MILSTAR-1 1)
22988 · 2026-04-03T07:15:55Z
Fixes
108
Observations
108
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T07:15:55.109088+00:00 |
|---|---|
| end_utc | 2026-07-11T15:22:25.455360+00:00 |
| family | celestialdex |
| norad_id | 22,988 |
| object_name | USA 99 (MILSTAR-1 1) |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 17.605 |
| n_snaps | 108 |
| span_days | 99.338 |
| mean_motion_first | 1.003 |
| mean_motion_last | 0.987 |
| delta_mean_motion | -0.016 |
| altitude_first_km | 35786.258 |
| altitude_last_km | 36227.183 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 5.346 |
| 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 | 2026-04-03T07:15:55.109088+00:00 |
| last_utc | 2026-07-11T15:22:25.455360+00:00 |
| last_fix_utc | 2026-07-11T15:22:25.455360+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T07:15:55.109088+00:00","mean_motion":1.00272988,"altitude_km":35786.258,"eccentricity":0.00040134,"inclination_deg":17.5072},{"utc":"2026-04-07T04:29:32.923104+00:00","mean_motion" |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/22988.json