Interactive Astronomy Lab
Explore Siderust's capabilities live in your browser, powered entirely by WebAssembly, no backend required.
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Sky Plot
Track altitude and azimuth of celestial objects over a 24-hour window.
Observer
Target
3D planetarium view from an observer on Earth's surface. Drag to look around from the center, zoom with the wheel, and compare the target's path with the selected altitude threshold.
Events
Coordinate Playground
Transform directions and positions between reference frames using the full IAU model stack.
Direction Transform
Local Horizontal
Convert a celestial direction to altitude / azimuth for an observer.
Position Transform
Retrieve an ephemeris position and convert its center or frame.
Time Lab
Convert between UTC, Julian Date, Modified Julian Date, and explore observation periods.
UTC date & time
Julian Date
Modified Julian Date
Julian centuries (from J2000)
Julian years (from J2000)
UTC (round-trip)
Observation Period
Duration
MJD range
UTC (round-trip)
Intersection
All computations run entirely in your browser using Siderust's WASM engine, no data leaves your machine.
Engine version: