Utilities
Satellite tools
A set of quick utilities for satellite and orbital work — parse a TLE, convert between time standards, and convert observer coordinates. Everything runs in your browser.
TLE comprehension
Paste a two-line element set to see its derived orbital parameters and current sub-satellite point.
NORAD ID25544
Int'l designator—
Inclination51.64°
Eccentricity0.0004999
Period92.9 min
Mean motion15.5010 rev/day
Apogee420 km
Perigee413 km
Semi-major axis6795 km
RAAN92.83°
Arg. of perigee77.76°
Epoch2024-03-19 01:51:42.567Z
Now: -49.87°, -98.91° at 239 km, 7.76 km/s
Time converter
Enter any date/time (ISO 8601, RFC, or leave blank for now) to convert across formats.
UTC2026-07-20T11:53:47.731Z
LocalMon Jul 20 2026 11:53:47 GMT+0000 (Coordinated Universal Time)
Unix (s)1784548427
Julian Date2461241.99569
GPS time2026-07-20T11:54:05.731Z
Day of year2026-201
Observer location
Convert between latitude/longitude and Maidenhead grid square.
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