{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.778","julian_year":2026.778,"time":"2026-10-11T23:42:50.457Z","years_from_j2000":26.778,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, 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. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. 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-7788","name":"κ Tuc","class":"f6v_yellow_white_main_sequence_star","category":"star","object_type":"F6V yellow-white main-sequence star","mag":4.25,"mag_band":"V","abs_mag":2.643,"abs_mag_band":"V","distance_ly":68.34802588880989,"distance_method":"parallax","ra_deg":18.94056,"dec_deg":-68.875927,"epoch_ra_deg":19.173407,"epoch_dec_deg":-68.732508,"epoch_moved_arcsec":11.525,"pm_ra_mas_yr":411.11,"pm_dec_mas_yr":127.43,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Tucana","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-7788","source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0","attribution":"HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01158-6853","companions":[{"measured":2017,"magnitude":7.54,"components":"AB","discoverer_code":"HJ 3423","separation_arcsec":4.6,"position_angle_deg":315},{"measured":2010,"magnitude":7.23,"components":"A,CD","discoverer_code":"HJ 3423","separation_arcsec":319.2,"position_angle_deg":310}],"spectral_type":"F6V","color_index_bv":0.48,"luminosity_solar":7.634841051830966,"radial_velocity_km_s":4,"spectral_type_source":"SIMBAD (1955AJ.....60...65E)","proper_motion_ra_mas_yr":411.11,"proper_motion_dec_mas_yr":127.43},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Kappa Tuc"},{"catalog":"Gliese","designation":"Gl 55.3A"},{"catalog":"HD","designation":"HD 7788"},{"catalog":"HIP","designation":"HIP 5896"},{"catalog":"HR","designation":"HR 377"}],"updated_at":"2026-10-01T09:42:28.932Z","attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}