{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T01:50:06.843Z","years_from_j2000":26.674,"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-58017","name":"HD 58017","class":"b9v_blue_white_main_sequence_star","category":"star","object_type":"B9V blue-white main-sequence star","mag":6.83,"mag_band":"V","abs_mag":-0.049,"abs_mag_band":"V","distance_ly":774.7182655214475,"distance_method":"parallax","ra_deg":110.34234000000001,"dec_deg":-48.527061,"epoch_ra_deg":110.526726,"epoch_dec_deg":-48.576945,"epoch_moved_arcsec":0.69,"pm_ra_mas_yr":-13.2,"pm_dec_mas_yr":22.25,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Puppis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-58017","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07214-4832","companions":[{"measured":2025,"magnitude":7.74,"components":null,"discoverer_code":"DUN  45","separation_arcsec":22.8,"position_angle_deg":157}],"spectral_type":"B9V","color_index_bv":-0.068,"luminosity_solar":91.11712330429192,"variable_mag_max":6.7,"variable_mag_min":6.88,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","proper_motion_ra_mas_yr":-13.2,"proper_motion_dec_mas_yr":22.25},"designations":[{"catalog":"HD","designation":"HD 58017"},{"catalog":"HIP","designation":"HIP 35648"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","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."}