{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T09:13:01.682Z","years_from_j2000":26.675,"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":"pgc-2675503","name":"PGC 2675503","class":"spiral_galaxy_sc","category":"galaxy","object_type":"Spiral galaxy Sc","mag":16.98,"mag_band":"B","abs_mag":-17.933107554355924,"abs_mag_band":"B","distance_ly":313362761.72823256,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":152.537399,"dec_deg":65.214035,"epoch_ra_deg":153.033512,"epoch_dec_deg":65.082124,"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/pgc-2675503","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.98,"h_mag":14.789,"j_mag":15.673,"k_mag":14.941,"redshift":0.022425911213,"hubble_type":"Sc","redshift_cmb":0.0220648924503819,"uncertainties":{"distance_ly":[65852777.60349966,66263031.90481446],"stellar_mass_solar":[747304484.5447619,747304484.5447619]},"major_axis_arcmin":0.47634,"minor_axis_arcmin":0.150381,"morphology_source":"SIMBAD (2006A&A...445..765K, quality D)","position_angle_deg":88,"stellar_mass_solar":1214369787.385238},"designations":[{"catalog":"2MASX","designation":"2MASX 10100897+6512505"},{"catalog":"PGC","designation":"PGC 2675503"},{"catalog":"WISExSCOS","designation":"WISExSCOS J101008.95+651251.5"}],"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."}