Evidence
Is it right? Check our numbers.
We measured how far each target moved between two SPHEREx observing seasons, from the images alone. Then we compared that with the best independent prediction: Gaia DR3, or published astrometry where Gaia has none. Here is every target, including the ones we could not measure.
Numbered tests: was it tested, and is it right?
Each test was run in a separate test round on the final code. The pass thresholds were fixed before the run. Tests that did not pass stay in the list, in their place; a re-test will update this page.
Loading the test results…
Measured motion against the catalogue
One row per target. The big numbers are the speed per year: our fit of all images against the catalogue. The small lines give the shift between two seasons seen with the same telescope orientation, about a year apart; the pass rule (fixed before testing) is on that shift.
Loading the measurements…
Why you can trust this
Control: stars that should not move
Known asteroids found blindly
We searched 24 ecliptic fields without being told where to look, then matched what we found to the known asteroids (SkyBoT, positions moved to where SPHEREx was). 217 known asteroids recovered: V<17 47 of 53, V<18 101 of 132. Median position offset 0.68″. 47 objects were linked into tracks; their speed agrees with the orbit prediction to a median 0.36 %. All asteroid results.
The challenge, item by item
What we cannot explain yet
These are open questions, not results. We list them so you can judge the numbers above.