{"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":"2026-09-06T19:11:04.162Z","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-11722","name":"UGC 11722","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":14.44,"mag_band":"B","abs_mag":-20.027004957028574,"abs_mag_band":"B","distance_ly":255168385.99947828,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":319.909637,"dec_deg":21.972088,"epoch_ra_deg":320.214299,"epoch_dec_deg":22.085292,"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":"Vulpecula","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-11722","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.44,"h_mag":10.708,"j_mag":11.464,"k_mag":10.441,"redshift":0.0165236482618,"hubble_type":"Sb","redshift_cmb":0.0180211532446045,"uncertainties":{"distance_ly":[12909025.667786608,12911582.204680746],"stellar_mass_solar":[7473234868.210383,7473234868.210383]},"major_axis_arcmin":0.89,"minor_axis_arcmin":0.409,"morphology_source":"SIMBAD (2003A&A...412...45P, quality E)","position_angle_deg":105,"stellar_mass_solar":16814778453.473362},"designations":[{"catalog":"2MASX","designation":"2MASX 21193831+2158195"},{"catalog":"PGC","designation":"PGC 66558"},{"catalog":"WISExSCOS","designation":"WISExSCOS J211938.26+215817.5"}],"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."}