{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T21:53:49.960Z","years_from_j2000":26.676,"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":"ngc-3252","name":"NGC 3252","class":"barred_spiral_galaxy_sbcd","category":"galaxy","object_type":"Barred spiral galaxy SBcd","mag":14.1,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":55978906.42070088,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":158.59641666666667,"dec_deg":73.76497222222223,"epoch_ra_deg":159.132154,"epoch_dec_deg":73.626335,"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":"Draco","discovered":"1785","featured":false,"url":"https://spacecatalog.org/object/ngc-3252","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.1,"h_mag":10.49,"j_mag":11.18,"k_mag":10.26,"redshift":0.0038,"hubble_type":"SBcd","wikidata_id":"Q1103824","redshift_cmb":0.003995351576798756,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14200914.385612765,14200914.385612765]},"major_axis_arcmin":1.87,"minor_axis_arcmin":0.66,"position_angle_deg":36,"surface_brightness":23.3,"radial_velocity_km_s":1148},"designations":[{"catalog":"2MASX","designation":"2MASX J10342310+7345539"},{"catalog":"IRAS","designation":"IRAS 10303+7401"},{"catalog":"IRAS","designation":"IRAS F10303+7401"},{"catalog":"LEDA","designation":"LEDA 31278"},{"catalog":"MCG","designation":"MCG +12-10-049"},{"catalog":"NGC","designation":"NGC 3252"},{"catalog":"PGC","designation":"PGC 31278"},{"catalog":"UGC","designation":"UGC 5732"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"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."}