{"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":"2026-09-01T23:19:20.465Z","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-96097","name":"63 χ Leo","class":"f2iii_yellow_white_giant","category":"star","object_type":"F2III yellow-white giant","mag":4.62,"mag_band":"V","abs_mag":2.308,"abs_mag_band":"V","distance_ly":94.56545399881487,"distance_method":"parallax","ra_deg":166.254285,"dec_deg":7.336007,"epoch_ra_deg":166.600465,"epoch_dec_deg":7.190907,"epoch_moved_arcsec":9.271,"pm_ra_mas_yr":-344.41,"pm_dec_mas_yr":-47.4,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-96097","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"11050+0720","companions":[{"measured":2018,"magnitude":11,"components":"AB","discoverer_code":"KUI  54","separation_arcsec":4.9,"position_angle_deg":268},{"measured":2015,"magnitude":10.6,"components":"AC","discoverer_code":"STT 572","separation_arcsec":253.7,"position_angle_deg":310},{"measured":2015,"magnitude":11.74,"components":"AD","discoverer_code":"DIC   2","separation_arcsec":289.9,"position_angle_deg":298}],"spectral_type":"F2III","color_index_bv":0.332,"luminosity_solar":10.394413751488006,"radial_velocity_km_s":5,"spectral_type_source":"SIMBAD (2001AJ....121.2148G, quality C)","proper_motion_ra_mas_yr":-344.41,"proper_motion_dec_mas_yr":-47.4},"designations":[{"catalog":"Bayer/Flamsteed","designation":"63 Chi Leo"},{"catalog":"HD","designation":"HD 96097"},{"catalog":"HIP","designation":"HIP 54182"},{"catalog":"HR","designation":"HR 4310"}],"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."}