{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T20:04:40.189Z","years_from_j2000":26.668,"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-9734","name":"HD 9734","class":"k5v_orange_dwarf","category":"star","object_type":"K5V orange dwarf","mag":9.88,"mag_band":"V","abs_mag":6.68,"abs_mag_band":"V","distance_ly":142.36432346595905,"distance_method":"parallax","ra_deg":23.48001,"dec_deg":-55.523622,"epoch_ra_deg":23.739581,"epoch_dec_deg":-55.387205,"epoch_moved_arcsec":5.382,"pm_ra_mas_yr":-41.5,"pm_dec_mas_yr":-197.5,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-9734","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01339-5531","companions":[{"measured":2022,"magnitude":12.76,"components":null,"discoverer_code":"RST1221","separation_arcsec":2.4,"position_angle_deg":328}],"spectral_type":"K5V","color_index_bv":1.072,"luminosity_solar":0.1853531623414811,"variable_mag_max":9.817,"variable_mag_min":9.927,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1972AJ.....77..486U, quality C)","proper_motion_ra_mas_yr":-41.5,"proper_motion_dec_mas_yr":-197.5},"designations":[{"catalog":"HD","designation":"HD 9734"},{"catalog":"HIP","designation":"HIP 7290"}],"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."}