{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T19:53:31.217Z","years_from_j2000":26.679,"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-548-044","name":"ESO 548-044","class":"lenticular_galaxy_s0_a","category":"galaxy","object_type":"Lenticular galaxy S0/a","mag":13.82,"mag_band":"B","abs_mag":-17.82136778192546,"abs_mag_band":"B","distance_ly":69454346.85622254,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":53.580128,"dec_deg":-19.424381,"epoch_ra_deg":53.882365,"epoch_dec_deg":-19.33407,"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":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-548-044","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.82,"h_mag":10.78,"j_mag":11.444,"k_mag":10.563,"redshift":0.00517,"hubble_type":"S0/a","redshift_cmb":0.0049535257502251,"uncertainties":{"distance_ly":[7818475.936693043,7818604.632044568],"stellar_mass_solar":[373692479.4595487,373692479.4595487]},"major_axis_arcmin":1.95294,"minor_axis_arcmin":0.808519,"morphology_source":"SIMBAD (2015MNRAS.452.1128M, quality D)","position_angle_deg":57,"stellar_mass_solar":747384958.9190974},"designations":[{"catalog":"2MASX","designation":"2MASX 03341923-1925277"},{"catalog":"PGC","designation":"PGC 13220"},{"catalog":"WISExSCOS","designation":"WISExSCOS J033419.27-192527.4"}],"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."}