{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T04:34:22.441Z","years_from_j2000":26.671,"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-34318","name":"HD 34318","class":"a2_3v_g8iii_k1iii_white_main_sequence_star","category":"star","object_type":"A2/3V+G8III+K1III white main-sequence star","mag":6.45,"mag_band":"V","abs_mag":-0.343,"abs_mag_band":"V","distance_ly":744.6492567469854,"distance_method":"parallax","ra_deg":79.044,"dec_deg":-11.352553,"epoch_ra_deg":79.35868,"epoch_dec_deg":-11.322255,"epoch_moved_arcsec":0.119,"pm_ra_mas_yr":-0.3,"pm_dec_mas_yr":4.45,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lepus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-34318","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05162-1121","companions":[{"measured":2025,"magnitude":7.1,"components":null,"discoverer_code":"CHR 225","separation_arcsec":0.1,"position_angle_deg":56}],"spectral_type":"A2/3V+G8III+K1III","color_index_bv":0.67,"luminosity_solar":119.45380829338862,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality C)","proper_motion_ra_mas_yr":-0.3,"proper_motion_dec_mas_yr":4.45},"designations":[{"catalog":"HD","designation":"HD 34318"},{"catalog":"HIP","designation":"HIP 24560"}],"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."}