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Spacecraft · evidence and sources

Lucy

NASA mission on a 12-year tour to visit multiple Trojan asteroids.

JPL Horizons · to Dec 2032 Trajectory basis, the same label the app shows on the selection card.

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Every aspect, with its origin

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.

ObservedCatalogComputedReconstructedIllustrativeUndocumented
Trajectory Catalog

Trajectory from Horizons state vectors

Lucy's position is interpolated between 137 heliocentric state-vector samples from JPL Horizons that run through 2032-12-18. Past the last sample the marker holds its final position.

SourceJPL Horizons · record lucy
Epoch2021-10-17 to 2032-12-18
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 Catalog

Bulk properties

Lucy: mass 1.550 × 10^3 kg. These values are bundled with the object record and drive the rendered size.

SourceJPL Horizons
Description Undocumented

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
LimitBackground reading is linked under Further reading; it is not the source of the displayed numbers.

Trajectory coverage: 2021-10-17 to 2032-12-18 (137 samples). Outside that window the marker holds its last known position.

What is not measured

Nothing on this page is a reconstruction or a schematic; every record above is observed, catalogued or computed.

Not yet documented

  • Appearance: no record. Space Time does not claim a source for this aspect.
  • Description: Background reading is linked under Further reading; it is not the source of the displayed numbers.

Dataset freshness

Snapshots this page depends on, read from the generated manifests at request time.
DatasetLast refreshedHorizonAutomated
Spacecraft trajectories (baked keyframes)
JPL Horizons
 no snapshot date Per craft: each evidence page states the first and last sample date No, refreshed by hand
scripts/bake-trajectories.mjs

Sources cited

Further reading

Wikipedia: Lucy (background only; not the source of the displayed numbers)

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