{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T02:32:04.070Z","years_from_j2000":26.682,"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-12213","name":"UGC 12213","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":14.626,"mag_band":"B","abs_mag":-18.805049091227957,"abs_mag_band":"B","distance_ly":158356426.73055944,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":342.762665,"dec_deg":7.295993,"epoch_ra_deg":343.100942,"epoch_dec_deg":7.438302,"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":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-12213","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.626,"h_mag":13.121,"j_mag":13.728,"k_mag":12.931,"redshift":0.010742,"redshift_cmb":0.0112406408159044,"uncertainties":{"distance_ly":[31308375.01585454,31403016.966608845],"stellar_mass_solar":[373677681.7766525,373677681.7766525]},"stellar_mass_solar":560516522.6649787},"designations":[{"catalog":"2MASX","designation":"2MASX 22510303+0717455"},{"catalog":"PGC","designation":"PGC 69859"},{"catalog":"WISExSCOS","designation":"WISExSCOS J225103.01+071745"}],"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."}