{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T13:49:51.096Z","years_from_j2000":26.67,"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-3285b","name":"NGC 3285B","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":13.2,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":158790547.10282144,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":158.65366666666665,"dec_deg":-27.652944444444444,"epoch_ra_deg":158.968159,"epoch_dec_deg":-27.79148,"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":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ngc-3285b","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.82,"h_mag":10.71,"j_mag":11.64,"k_mag":10.28,"v_mag":13.2,"redshift":0.01012,"hubble_type":"Sb","wikidata_id":"Q1104055","redshift_cmb":0.01127119748563521,"ngc_type_code":"G","uncertainties":{"distance_ly":[15481373.482548933,15481373.482548933]},"major_axis_arcmin":1.64,"minor_axis_arcmin":1.04,"wikipedia_article":"NGC 3285B","position_angle_deg":52,"surface_brightness":23.27,"radial_velocity_km_s":3019},"designations":[{"catalog":"2MASX","designation":"2MASX J10343687-2739108"},{"catalog":"ESO","designation":"ESO 501-018"},{"catalog":"ESO","designation":"ESO 501-18"},{"catalog":"ESO-LV","designation":"ESO-LV 501-0180"},{"catalog":"IRAS","designation":"IRAS 10322-2723"},{"catalog":"LEDA","designation":"LEDA 31293"},{"catalog":"MCG","designation":"MCG -04-25-022"},{"catalog":"NGC","designation":"NGC 3285B"},{"catalog":"PGC","designation":"PGC 31293"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}