{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T17:00:22.748Z","years_from_j2000":26.684,"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-3795a","name":"NGC 3795A","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":14.26,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":60844469.35594462,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":174.83879166666668,"dec_deg":58.26869444444444,"epoch_ra_deg":175.207681,"epoch_dec_deg":58.119875,"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/ngc-3795a","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.26,"redshift":0.003827,"hubble_type":"SABc","wikidata_id":"Q1106508","redshift_cmb":0.004341478371518548,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14236985.227685452,14236985.227685452]},"major_axis_arcmin":2.03,"minor_axis_arcmin":1.48,"position_angle_deg":71,"surface_brightness":24.33,"radial_velocity_km_s":1145},"designations":[{"catalog":"IRAS","designation":"IRAS F11366+5832"},{"catalog":"LEDA","designation":"LEDA 36137"},{"catalog":"MCG","designation":"MCG +10-17-035"},{"catalog":"NGC","designation":"NGC 3795A"},{"catalog":"PGC","designation":"PGC 36137"},{"catalog":"SDSS","designation":"SDSS J113921.31+581607.3"},{"catalog":"SDSS","designation":"SDSS J113921.32+581607.2"},{"catalog":"UGC","designation":"UGC 6616"}],"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."}