{"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":"2026-09-02T11:02:46.720Z","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-12869","name":"12 κ Ari","class":"ka1vmf2iii_ivsr_white_main_sequence_star","category":"star","object_type":"kA1VmF2III/IVSr white main-sequence star","mag":5.03,"mag_band":"V","abs_mag":1.302,"abs_mag_band":"V","distance_ly":181.6015880180387,"distance_method":"parallax","ra_deg":31.641345,"dec_deg":22.648317,"epoch_ra_deg":32.017696,"epoch_dec_deg":22.776263,"epoch_moved_arcsec":1.103,"pm_ra_mas_yr":20.62,"pm_dec_mas_yr":-35.84,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aries","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-12869","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"kA1VmF2III/IVSr","color_index_bv":0.121,"luminosity_solar":26.254273189937003,"radial_velocity_km_s":12,"spectral_type_source":"SIMBAD (1991JApA...12..133S, quality C)","proper_motion_ra_mas_yr":20.62,"proper_motion_dec_mas_yr":-35.84},"designations":[{"catalog":"Bayer/Flamsteed","designation":"12 Kappa Ari"},{"catalog":"HD","designation":"HD 12869"},{"catalog":"HIP","designation":"HIP 9836"},{"catalog":"HR","designation":"HR 613"}],"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."}