{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T22:06:35.221Z","years_from_j2000":26.679,"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-3765","name":"NGC 3765","class":"barred_spiral_galaxy_sbbc","category":"galaxy","object_type":"Barred spiral galaxy SBbc","mag":14.89,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":503790280.05844027,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":174.26741666666666,"dec_deg":24.096249999999998,"epoch_ra_deg":174.619061,"epoch_dec_deg":23.94763,"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":"1832","featured":false,"url":"https://spacecatalog.org/object/ngc-3765","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.89,"h_mag":11.17,"j_mag":11.9,"k_mag":10.9,"redshift":0.03405,"hubble_type":"SBbc","wikidata_id":"Q780861","redshift_cmb":0.035135892441662486,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[24855222.195424456,24855222.195424456]},"major_axis_arcmin":0.85,"minor_axis_arcmin":0.57,"position_angle_deg":61,"surface_brightness":22.92,"radial_velocity_km_s":10034},"designations":[{"catalog":"2MASX","designation":"2MASX J11370417+2405467"},{"catalog":"LEDA","designation":"LEDA 35956"},{"catalog":"MCG","designation":"MCG +04-28-001"},{"catalog":"NGC","designation":"NGC 3765"},{"catalog":"PGC","designation":"PGC 35956"},{"catalog":"SDSS","designation":"SDSS J113704.17+240546.4"},{"catalog":"SDSS","designation":"SDSS J113704.18+240546.5"}],"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."}