{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T11:40:46.979Z","years_from_j2000":26.667,"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-810","name":"NGC 810","class":"elliptical_galaxy_e5","category":"galaxy","object_type":"Elliptical galaxy E5","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":31.37041666666667,"dec_deg":13.251388888888888,"epoch_ra_deg":31.732443,"epoch_dec_deg":13.379967,"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":"Aries","discovered":"1871","featured":false,"url":"https://spacecatalog.org/object/ngc-810","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"hubble_type":"E5","wikidata_id":"Q1039357","discovered_by":"Édouard Stephan","ngc_type_code":"GPair","major_axis_arcmin":1.4,"minor_axis_arcmin":1.04389,"morphology_source":"SIMBAD (2021A&A...648A..64K, quality C)","wikipedia_article":"NGC 810","position_angle_deg":27},"designations":[{"catalog":"LEDA","designation":"LEDA 7965"},{"catalog":"NGC","designation":"NGC 810"},{"catalog":"NGC","designation":"NGC 810-1"},{"catalog":"PGC","designation":"PGC 7965"},{"catalog":"UGC","designation":"UGC 1583"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"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."}