{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T08:49:30.480Z","years_from_j2000":26.669,"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-46867","name":"HD 46867","class":"b0_5iii_iv_blue_white_giant","category":"star","object_type":"B0.5III-IV blue-white giant","mag":8.3,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":98.97975,"dec_deg":5.309775,"epoch_ra_deg":99.337467,"epoch_dec_deg":5.288259,"epoch_moved_arcsec":0.04,"pm_ra_mas_yr":-1.47,"pm_dec_mas_yr":-0.36,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Monoceros","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-46867","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06359+0519","companions":[{"measured":2017,"magnitude":9.2,"components":"AB","discoverer_code":"STF 939","separation_arcsec":30.3,"position_angle_deg":107},{"measured":2017,"magnitude":12.07,"components":"AD","discoverer_code":"ABH  47","separation_arcsec":34.9,"position_angle_deg":304},{"measured":2017,"magnitude":9.4,"components":"AC","discoverer_code":"STF 939","separation_arcsec":39.6,"position_angle_deg":51}],"spectral_type":"B0.5III-IV","color_index_bv":0.22,"radial_velocity_km_s":19,"spectral_type_source":"SIMBAD (quality C)","proper_motion_ra_mas_yr":-1.47,"proper_motion_dec_mas_yr":-0.36},"designations":[{"catalog":"HD","designation":"HD 46867"},{"catalog":"HIP","designation":"HIP 31513"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","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."}