{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T02:16:05.257Z","years_from_j2000":26.685,"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-8787","name":"UGC 8787","class":"spiral_galaxy_sa","category":"galaxy","object_type":"Spiral galaxy SA","mag":13.77,"mag_band":"B","abs_mag":-20.056071831124218,"abs_mag_band":"B","distance_ly":189950412.68358615,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":208.208878,"dec_deg":2.263803,"epoch_ra_deg":208.550508,"epoch_dec_deg":2.131094,"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":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-8787","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.77,"h_mag":11.566,"j_mag":12.272,"k_mag":11.232,"redshift":0.0138572769286,"hubble_type":"SA","redshift_cmb":0.0134608629987658,"uncertainties":{"distance_ly":[10350200.535198925,10352078.292079449],"stellar_mass_solar":[1868362323.5075948,1868362323.5075948]},"major_axis_arcmin":1.39008,"minor_axis_arcmin":0.371846,"morphology_source":"SIMBAD (2019MNRAS.488..590B, quality C)","position_angle_deg":144,"stellar_mass_solar":4670905808.768987},"designations":[{"catalog":"2MASX","designation":"2MASX 13525013+0215496"},{"catalog":"PGC","designation":"PGC 49303"},{"catalog":"WISExSCOS","designation":"WISExSCOS J135250.16+021549.1"}],"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."}