{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T20:42:37.507Z","years_from_j2000":26.681,"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-5864","name":"UGC 5864","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":15.422,"mag_band":"B","abs_mag":-20.38156841739392,"abs_mag_band":"B","distance_ly":472214761.09350014,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":161.266937,"dec_deg":10.18552,"epoch_ra_deg":161.620041,"epoch_dec_deg":10.04446,"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":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-5864","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.422,"h_mag":12.237,"j_mag":13.023,"k_mag":11.901,"redshift":0.0333,"redshift_cmb":0.0329851625100903,"uncertainties":{"distance_ly":[24525093.002350446,24536154.64337496],"stellar_mass_solar":[9340665176.13273,9340665176.13273]},"stellar_mass_solar":28021995528.39819},"designations":[{"catalog":"2MASX","designation":"2MASX 10450406+1011078"},{"catalog":"WISExSCOS","designation":"WISExSCOS J104504.04+101107.8"}],"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."}