{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T09:22:58.756Z","years_from_j2000":26.666,"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":"hd-36404","name":"HD 36404","class":"b9iiip_hg_blue_white_giant","category":"star","object_type":"B9IIIp:(Hg?) blue-white giant","mag":6.55,"mag_band":"V","abs_mag":-2.15,"abs_mag_band":"V","distance_ly":1792.0678481465354,"distance_method":"parallax","ra_deg":83.36968499999999,"dec_deg":42.108958,"epoch_ra_deg":83.847777,"epoch_dec_deg":42.127875,"epoch_moved_arcsec":0.153,"pm_ra_mas_yr":4.86,"pm_dec_mas_yr":-3.07,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Auriga","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-36404","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"B9IIIp:(Hg?)","color_index_bv":-0.015,"luminosity_solar":630.9573444801937,"radial_velocity_km_s":1,"spectral_type_source":"SIMBAD (1972AJ.....77..750C, quality C)","proper_motion_ra_mas_yr":4.86,"proper_motion_dec_mas_yr":-3.07},"designations":[{"catalog":"HD","designation":"HD 36404"},{"catalog":"HIP","designation":"HIP 26057"},{"catalog":"HR","designation":"HR 1846"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","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."}