{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T07:55:53.377Z","years_from_j2000":26.669,"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":"ugc-596","name":"UGC 596","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":14.742,"mag_band":"B","abs_mag":-21.483569788153265,"abs_mag_band":"B","distance_ly":573508465.4715526,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":14.416171,"dec_deg":8.092572,"epoch_ra_deg":14.765259,"epoch_dec_deg":8.237804,"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":"Pisces","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-596","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.742,"h_mag":11.369,"j_mag":12.07,"k_mag":10.973,"redshift":0.0391,"redshift_cmb":0.0398619936051903,"uncertainties":{"distance_ly":[30686203.141228236,30700538.864155617],"stellar_mass_solar":[9340262235.650887,9340262235.650887]},"stellar_mass_solar":84062360120.85799},"designations":[{"catalog":"2MASX","designation":"2MASX 00573988+0805332"},{"catalog":"WISExSCOS","designation":"WISExSCOS J005739.86+080533.3"}],"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":"2026-09-01T22:58:55.274Z","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."}