One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.
Trajectory from Horizons state vectors
99942 Apophis's position is interpolated between 937 heliocentric state-vector samples from JPL Horizons that run through 2032-01-01. Past the last sample the marker holds its final position.
Epoch2026-06-01 to 2032-01-01
MethodJ2000 equatorial, Sun-centred position samples baked at author time by scripts/bake-trajectories.mjs; the app interpolates linearly between adjacent samples.
UncertaintyHorizons state vectors are precise to the metre scale; linear interpolation between samples adds an error that grows with the sample spacing (days for cruise, minutes around flybys).
LimitPosition only. Spacecraft attitude (which way it points) is not modelled, and no covariance is stored.
Physical data
Undocumented
Bulk properties
99942 Apophis: mean radius 0.2 km; mass 6.100 × 10^10 kg. These values are bundled with the object record and drive the rendered size.
SourceBundled object record
LimitThe object catalog does not record where these values came from; treat them as unverified until the record is completed.
Close-up appearance
The surface is a procedural shape unless a source record above says otherwise. It is not a measured shape model.
SourceSpace Time rendering contract
LimitNot a resolved observation.
Description and facts
The short description and the fact list are written by the Space Time authors for orientation. They are not quoted from a catalog field and carry no citation of their own.
SourceSpace Time editorial text
Trajectory coverage: 2026-06-01 to 2032-01-01 (937 samples). Outside that window the marker holds its last known position.
Space Time