{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T17:42:11.518Z","years_from_j2000":26.654,"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":"chara","name":"Chara","class":"g0v_yellow_main_sequence_star","category":"star","object_type":"G0V yellow main-sequence star","mag":4.24,"mag_band":"V","abs_mag":4.608,"abs_mag_band":"V","distance_ly":27.52596749740456,"distance_method":"parallax","ra_deg":188.43616500000002,"dec_deg":41.35748,"epoch_ra_deg":188.755555,"epoch_dec_deg":41.211537,"epoch_moved_arcsec":20.35,"pm_ra_mas_yr":-705.06,"pm_dec_mas_yr":292.93,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Canes Venatici","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/chara","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"12337+4121","companions":[{"measured":1978,"magnitude":null,"components":"Aa,Ab","discoverer_code":"BNU   4","separation_arcsec":0.1,"position_angle_deg":43},{"measured":2015,"magnitude":10.7,"components":"AB","discoverer_code":"BU 1433","separation_arcsec":265.7,"position_angle_deg":199}],"spectral_type":"G0V","color_index_bv":0.588,"luminosity_solar":1.2496833972112191,"radial_velocity_km_s":6.6,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","proper_motion_ra_mas_yr":-705.06,"proper_motion_dec_mas_yr":292.93},"designations":[{"catalog":"Bayer/Flamsteed","designation":"8 Beta CVn"},{"catalog":"Common name","designation":"Chara"},{"catalog":"Gliese","designation":"Gl 475"},{"catalog":"HD","designation":"HD 109358"},{"catalog":"HIP","designation":"HIP 61317"},{"catalog":"HR","designation":"HR 4785"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T16:03:54.983Z","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."}