The Dexes / Satellite Decay / 27663
CelestialObjectDex · Satellite Decay
NAVSTAR 51 (USA 166)
27663 · 2026-04-02T08:02:55Z
Fixes
147
Sensor hits
0
Observations
147
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-02T08:02:55.567968+00:00 |
|---|---|
| end_utc | 2026-08-09T19:09:59.999040+00:00 |
| family | celestialdex |
| norad_id | 27,663 |
| object_name | NAVSTAR 51 (USA 166) |
| group | active |
| eccentricity_median | 0.015 |
| inclination_deg_median | 54.885 |
| n_snaps | 147 |
| span_days | 129.463 |
| mean_motion_first | 2.006 |
| mean_motion_last | 2.006 |
| delta_mean_motion | -0.000 |
| altitude_first_km | 20182.114 |
| altitude_last_km | 20182.723 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 0.005 |
| 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 | 2026-04-02T08:02:55.567968+00:00 |
| last_utc | 2026-08-09T19:09:59.999040+00:00 |
| last_fix_utc | 2026-08-09T19:09:59.999040+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-02T08:02:55.567968+00:00","mean_motion":2.00564702,"altitude_km":20182.114,"eccentricity":0.01484895,"inclination_deg":54.8996},{"utc":"2026-04-05T07:51:03.752928+00:00","mean_motion" |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/27663.json