{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T06:20:34.478Z","years_from_j2000":26.677,"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-7604","name":"UGC 7604","class":"spiral_galaxy_s","category":"galaxy","object_type":"Spiral galaxy S","mag":15.19,"mag_band":"B","abs_mag":-19.505492931675903,"abs_mag_band":"B","distance_ly":283481329.9248162,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":187.151,"dec_deg":31.48182,"epoch_ra_deg":187.484896,"epoch_dec_deg":31.333218,"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":"Canes Venatici","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-7604","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.19,"redshift":0.0225073912537,"hubble_type":"S","redshift_cmb":0.0199914887941559,"uncertainties":{"distance_ly":[65857024.10667507,66271455.48885762],"stellar_mass_solar":[934142782.2016878,934142782.2016878]},"major_axis_arcmin":1.24226,"minor_axis_arcmin":0.161866,"morphology_source":"SIMBAD (2019MNRAS.488..590B, quality C)","position_angle_deg":15,"stellar_mass_solar":1868285564.4033756},"designations":[{"catalog":"PGC","designation":"PGC 41051"},{"catalog":"WISExSCOS","designation":"WISExSCOS J122836.19+312855.1"}],"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."}