{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T13:10:10.676Z","years_from_j2000":26.664,"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-49486","name":"PGC 49486","class":"spiral_galaxy_sc","category":"galaxy","object_type":"Spiral galaxy Sc","mag":16.226,"mag_band":"B","abs_mag":-17.722868025878704,"abs_mag_band":"B","distance_ly":201001584.22119367,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":208.810257,"dec_deg":1.907791,"epoch_ra_deg":209.151962,"epoch_dec_deg":1.775925,"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/pgc-49486","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.226,"h_mag":14.012,"j_mag":14.551,"k_mag":13.502,"redshift":0.01476,"hubble_type":"Sc","redshift_cmb":0.0142357538026618,"uncertainties":{"distance_ly":[10506922.500855947,10509158.384439595],"stellar_mass_solar":[280252973.5121804,280252973.5121804]},"major_axis_arcmin":0.636473,"minor_axis_arcmin":0.177067,"morphology_source":"SIMBAD (2006A&A...445..765K, quality D)","position_angle_deg":42,"stellar_mass_solar":560505947.0243608},"designations":[{"catalog":"2MASX","designation":"2MASX 13551446+0154280"},{"catalog":"PGC","designation":"PGC 49486"},{"catalog":"WISExSCOS","designation":"WISExSCOS J135514.59+015430"}],"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":"2026-08-30T09:56:50.739Z","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."}