UPSA Object Registry

Everything science has measured, on one card.

Astronomy keeps its knowledge in separate archives — one for what an object is, another for how precisely it was measured, others for planets, for small bodies, for galaxies. This register pulls them onto a single card per object and keeps every published value with the paper it came from.

Any identifier works — NGC 224, HIP 21421, Gaia DR3 2081900940499099136, 433 Eros. Coordinates open a cone search. A name we do not hold yet is fetched from the archives on the spot.

3,910,824objects held
265,550published values
7,030,745cross-identifiers
3,093citations
64,147catalogues indexed

Other ways to look

the same records, different geometry
The solar neighbourhood stars within 100 pc, from above Large-scale structure right ascension against redshift Cone search everything held around a point

Holdings by class

weekly refresh
Asteroid 1,556,250 Star 1,433,834 Quasar 448,659 Galaxy 285,795 Agn 104,892 Source 22,503 Nebula 13,753 Galaxy group 10,374 Cluster 10,280 Exoplanet 8,580 Transient 8,295 Comet 4,071 Gravitation 1,511 Other 961 Association 862 Moon 187 Dwarf planet 9 Planet 8

Most studied

by publication count
ObjectTypePapersV
LMC Galaxy 19,346 0.4
Galactic Center Region 16,570 —
M 31 AGN 13,768 3.44
SMC Galaxy 12,477 2.2
Local Group GroupG 9,473 —
Magellanic Clouds GroupG 8,115 —
M 87 AGN 7,919 8.63
Virgo Cluster ClG 7,192 —
M 1 SNRemnant 6,571 —
M 33 GtowardsGroup 6,283 5.72
M 82 AGN 6,199 8.41
3C 273 BLLac 6,052 14.83

Recently deepened

opened by a reader, then harvested
ObjectTypePapers
248839 Mazeikiai Asteroid 0
1709 Ukraina Asteroid 0
V* TW PsA BYDraV* 322
HD 225711 ** 9
CANDELS UDS F160W J021716.27-050753.4 EmissionG 6
LEDA 182737 EmissionG 6
LEDA 115275 Galaxy 5
LEDA 115270 Galaxy 6
LEDA 162761 EmissionG 10
LEDA 169915 GtowardsCl 15
LEDA 119170 Galaxy 7
LEDA 139889 Galaxy 9

How the register grows

  1. Seeded

    The whole Solar System, every confirmed exoplanet with its published parameter sets, and the well-cited part of SIMBAD are loaded and held here, not proxied.

  2. On demand

    Ask for something we do not hold and the registry queries SIMBAD, JPL and NED live, writes the answer into the register and keeps it. The catalogue thickens as it is used.

  3. Deepened

    Opening an object triggers a harvest: every SIMBAD measurement table, the Gaia DR3 row, NED redshifts and the VizieR spectral energy distribution.

  4. Refreshed weekly

    Archives publish continuously. A weekly pass re-reads them, adds what is new and re-harvests the records people read.

Ingest log

last passes
ArchivePassFinished (UTC)RowsStatus
registry dedupe 2026-08-14 17:51 12,657 ok
SIMBAD ident nbref>=12 2026-08-14 17:45 3,839,345 ok
SIMBAD allfluxes nbref>=5 2026-08-14 17:39 2,266,921 ok
SIMBAD basic nbref>=5 2026-08-14 17:28 0 ok
JPL SBDB small-bodies 2026-08-14 17:28 1,560,329 ok
JPL Horizons major-bodies 2026-08-14 17:11 197 ok
NASA Exoplanet Archive planets 2026-08-14 17:08 6,336 ok
VizieR catalog-index 2026-08-14 17:04 64,148 ok