{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T23:17:24.097Z","years_from_j2000":26.682,"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-502-012","name":"ESO 502-012","class":"spiral_galaxy","category":"galaxy","object_type":"Spiral galaxy","mag":13.382,"mag_band":"B","abs_mag":-20.19586897808584,"abs_mag_band":"B","distance_ly":169433651.62231258,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":165.708847,"dec_deg":-23.591579,"epoch_ra_deg":166.036104,"epoch_dec_deg":-23.736063,"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":"Crater","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-502-012","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.382,"h_mag":11.28,"j_mag":11.844,"k_mag":10.973,"redshift":0.01214,"hubble_type":"2.0","redshift_cmb":0.0120199071359951,"uncertainties":{"distance_ly":[9741830.170173546,9743170.94847011],"stellar_mass_solar":[1868379207.9840662,1868379207.9840662]},"major_axis_arcmin":0.833,"minor_axis_arcmin":0.4,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":30,"stellar_mass_solar":3736758415.9681325},"designations":[{"catalog":"2MASX","designation":"2MASX 11025012-2335296"},{"catalog":"PGC","designation":"PGC 33349"},{"catalog":"WISExSCOS","designation":"WISExSCOS J110250.15-233529.9"}],"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."}