{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T18:07:32.933Z","years_from_j2000":26.687,"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":"eso-434-028","name":"ESO 434-028","class":"lenticular_galaxy","category":"galaxy","object_type":"Lenticular galaxy","mag":12.71,"mag_band":"B","abs_mag":-19.70843094381076,"abs_mag_band":"B","distance_ly":99337234.20024647,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":146.054,"dec_deg":-28.84879,"epoch_ra_deg":146.351282,"epoch_dec_deg":-28.97182,"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":"Antlia","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-434-028","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.71,"h_mag":9.732,"j_mag":10.467,"k_mag":9.538,"redshift":0.00760095380048,"hubble_type":"-3.0","redshift_cmb":0.0070734358863204,"uncertainties":{"distance_ly":[6916716.325947723,6917178.990360183],"stellar_mass_solar":[2802656107.8215947,2802656107.8215947]},"major_axis_arcmin":0.91,"minor_axis_arcmin":0.673,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":85,"stellar_mass_solar":6539530918.250388},"designations":[{"catalog":"2MASX","designation":"2MASX 09441294-2850567"},{"catalog":"PGC","designation":"PGC 27882"}],"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":"2026-09-02T19:50:56.720Z","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."}