The Dexes / Satellite Decay / 42812
CelestialObjectDex · Satellite Decay
IRIDIUM 121
42812 · 2026-04-03T07:20:42Z
Fixes
227
Observations
227
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T07:20:42.707904+00:00 |
|---|---|
| end_utc | 2026-08-09T19:40:18.987744+00:00 |
| family | celestialdex |
| norad_id | 42,812 |
| object_name | IRIDIUM 121 |
| group | active |
| eccentricity_median | 0.000 |
| inclination_deg_median | 86.400 |
| n_snaps | 227 |
| span_days | 128.514 |
| mean_motion_first | 14.342 |
| mean_motion_last | 14.342 |
| delta_mean_motion | 0.000 |
| altitude_first_km | 777.671 |
| altitude_last_km | 777.668 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.000 |
| 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 | 2026-04-03T07:20:42.707904+00:00 |
| last_utc | 2026-08-09T19:40:18.987744+00:00 |
| last_fix_utc | 2026-08-09T19:40:18.987744+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T07:20:42.707904+00:00","mean_motion":14.34216476,"altitude_km":777.671,"eccentricity":0.00021184,"inclination_deg":86.4007},{"utc":"2026-04-03T20:44:26.765088+00:00","mean_motion": |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/42812.json