{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:50:25.234Z","years_from_j2000":26.665,"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-33908","name":"PGC 33908","class":"spiral_galaxy_scd","category":"galaxy","object_type":"Spiral galaxy Scd","mag":16.02,"mag_band":"B","abs_mag":-17.28327953623022,"abs_mag_band":"B","distance_ly":149307554.57490325,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":167.605,"dec_deg":40.05272,"epoch_ra_deg":167.977377,"epoch_dec_deg":39.907134,"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-33908","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.02,"h_mag":14.142,"j_mag":14.607,"k_mag":13.85,"redshift":0.010022045011,"hubble_type":"Scd","redshift_cmb":0.0106033973114513,"uncertainties":{"distance_ly":[29214891.519590855,29297247.969174217],"stellar_mass_solar":[186839590.0691705,186839590.0691705]},"major_axis_arcmin":0.694217,"minor_axis_arcmin":0.219095,"morphology_source":"SIMBAD (2015ApJS..217...27A, quality C)","position_angle_deg":31,"stellar_mass_solar":280259385.1037558},"designations":[{"catalog":"2MASX","designation":"2MASX 11102508+4003087"},{"catalog":"PGC","designation":"PGC 33908"}],"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."}