{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T14:04:32.506Z","years_from_j2000":26.667,"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-28360","name":"PGC 28360","class":"spiral_galaxy_s","category":"galaxy","object_type":"Spiral galaxy S","mag":16.5,"mag_band":"B","abs_mag":-17.414824213386517,"abs_mag_band":"B","distance_ly":197874904.32621074,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":147.751953,"dec_deg":30.6043,"epoch_ra_deg":148.143896,"epoch_dec_deg":30.478849,"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":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-28360","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.5,"h_mag":13.867,"j_mag":14.551,"k_mag":13.572,"redshift":0.014497987249,"hubble_type":"S","redshift_cmb":0.0140166055919143,"uncertainties":{"distance_ly":[42095977.004858844,42269104.19748502],"stellar_mass_solar":[653924515.6341614,653924515.6341614]},"major_axis_arcmin":0.752957,"minor_axis_arcmin":0.165575,"morphology_source":"SIMBAD (quality D)","position_angle_deg":164,"stellar_mass_solar":1027595667.4251105},"designations":[{"catalog":"2MASX","designation":"2MASX 09510046+3036154"},{"catalog":"PGC","designation":"PGC 28360"},{"catalog":"WISExSCOS","designation":"WISExSCOS J095100.49+303614.7"}],"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."}