The Dexes / Satellite Decay / 55015
CelestialObjectDex · Satellite Decay
BIRKELAND
55015 · 2026-04-03T14:07:39Z
Fixes
324
Observations
324
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T14:07:39.958752+00:00 |
|---|---|
| end_utc | 2026-08-23T22:56:27.677760+00:00 |
| family | celestialdex |
| norad_id | 55,015 |
| object_name | BIRKELAND |
| group | active |
| eccentricity_median | 0.001 |
| inclination_deg_median | 97.335 |
| n_snaps | 324 |
| span_days | 142.367 |
| mean_motion_first | 15.387 |
| mean_motion_last | 15.411 |
| delta_mean_motion | 0.024 |
| altitude_first_km | 449.857 |
| altitude_last_km | 442.878 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.050 |
| 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 | 2026-04-03T14:07:39.958752+00:00 |
| last_utc | 2026-08-23T22:56:27.677760+00:00 |
| last_fix_utc | 2026-08-23T22:56:27.677760+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T14:07:39.958752+00:00","mean_motion":15.38732255,"altitude_km":449.857,"eccentricity":0.00070942,"inclination_deg":97.34},{"utc":"2026-04-03T20:22:14.522016+00:00","mean_motion":15 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/55015.json