The Dexes / Satellite Decay / 39635
CelestialObjectDex · Satellite Decay
IRNSS-1B
39635 · 2026-04-02T11:25:21Z
Fixes
179
Sensor hits
0
Observations
179
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-02T11:25:21.931392+00:00 |
|---|---|
| end_utc | 2026-08-07T03:25:38.671680+00:00 |
| family | celestialdex |
| norad_id | 39,635 |
| object_name | IRNSS-1B |
| group | active |
| eccentricity_median | 0.002 |
| inclination_deg_median | 28.973 |
| n_snaps | 179 |
| span_days | 126.667 |
| mean_motion_first | 1.003 |
| mean_motion_last | 1.003 |
| delta_mean_motion | -0.000 |
| altitude_first_km | 35784.178 |
| altitude_last_km | 35786.455 |
| decay_rate_rev_day2 | -0.000 |
| altitude_decay_km_day | 0.013 |
| 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 | 2026-04-02T11:25:21.931392+00:00 |
| last_utc | 2026-08-07T03:25:38.671680+00:00 |
| last_fix_utc | 2026-08-07T03:25:38.671680+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-02T11:25:21.931392+00:00","mean_motion":1.00280407,"altitude_km":35784.178,"eccentricity":0.00220748,"inclination_deg":29.0593},{"utc":"2026-04-03T23:21:34.185312+00:00","mean_motion" |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/39635.json