{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T17:18:24.450Z","years_from_j2000":26.665,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"pgc-4012467","name":"PGC 4012467","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":17.79,"mag_band":"B","abs_mag":-14.127408664262028,"abs_mag_band":"B","distance_ly":78869231.31300537,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":218.559,"dec_deg":3.25057,"epoch_ra_deg":218.897858,"epoch_dec_deg":3.132524,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-4012467","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":17.79,"redshift":0.00590373295187,"redshift_cmb":0.0056221527518262,"uncertainties":{"distance_ly":[17213963.429387458,17242497.892258093],"stellar_mass_solar":[8408045.157523924,8408045.157523924]},"stellar_mass_solar":14013408.595873207},"designations":[{"catalog":"PGC","designation":"PGC 4012467"},{"catalog":"SDSSJ","designation":"SDSSJ 143414.24+031501.6"},{"catalog":"WISExSCOS","designation":"WISExSCOS J143414.26+031501.6"}],"source":{"id":"glade_plus","name":"GLADE+ (Galaxy List for the Advanced Detector Era)","url":"https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/291","license":"VizieR terms; cite Dalya+ 2022 (2022MNRAS.514.1403D)"},"updated_at":"2026-08-30T09:56:50.739Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}