{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T21:15:50.562Z","years_from_j2000":26.684,"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-5680","name":"UGC 5680","class":"barred_spiral_galaxy_sb_xa","category":"galaxy","object_type":"Barred spiral galaxy SB_xa","mag":14.634,"mag_band":"B","abs_mag":-20.352918754531558,"abs_mag_band":"B","distance_ly":324197473.5638073,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":157.358597,"dec_deg":60.295635,"epoch_ra_deg":157.80631,"epoch_dec_deg":60.158232,"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":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-5680","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.634,"h_mag":10.719,"j_mag":11.453,"k_mag":10.458,"redshift":0.0233,"hubble_type":"SB_xa","redshift_cmb":0.0228151578454918,"uncertainties":{"distance_ly":[17128104.21081125,17133514.56007269],"stellar_mass_solar":[8407135813.194359,8407135813.194359]},"major_axis_arcmin":1.3606,"minor_axis_arcmin":0.425052,"morphology_source":"SIMBAD (2019MNRAS.488.2175B, quality C)","position_angle_deg":164,"stellar_mass_solar":62586455498.22467},"designations":[{"catalog":"2MASX","designation":"2MASX 10292606+6017442"},{"catalog":"PGC","designation":"PGC 30898"},{"catalog":"WISExSCOS","designation":"WISExSCOS J102926.00+601744.1"}],"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."}