{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T22:35:31.086Z","years_from_j2000":26.665,"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":"electra","name":"Electra","class":"b6iiie_blue_white_giant","category":"star","object_type":"B6IIIe blue-white giant","mag":3.72,"mag_band":"V","abs_mag":-1.748,"abs_mag_band":"V","distance_ly":404.660587051275,"distance_method":"parallax","ra_deg":56.218905,"dec_deg":24.113339,"epoch_ra_deg":56.61832,"epoch_dec_deg":24.197607,"epoch_moved_arcsec":1.329,"pm_ra_mas_yr":21.55,"pm_dec_mas_yr":-44.92,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/electra","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03449+2407","companions":[{"measured":1988,"magnitude":7.5,"components":"Aa,Ac","discoverer_code":"OCC 424","separation_arcsec":0.2,"position_angle_deg":-1},{"measured":1987,"magnitude":7,"components":"Aa,Ab","discoverer_code":"OCC 424","separation_arcsec":1.5,"position_angle_deg":-1},{"measured":2011,"magnitude":13,"components":"AB","discoverer_code":"HL    7","separation_arcsec":99.1,"position_angle_deg":144},{"measured":2011,"magnitude":13.75,"components":"AC","discoverer_code":"HL    7","separation_arcsec":142.9,"position_angle_deg":121},{"measured":2011,"magnitude":11.47,"components":"AE","discoverer_code":"HL    7","separation_arcsec":186.8,"position_angle_deg":346},{"measured":2011,"magnitude":11,"components":"AD","discoverer_code":"HL    7","separation_arcsec":216.2,"position_angle_deg":193}],"wikidata_id":"Q13429","spectral_type":"B6IIIe","color_index_bv":-0.105,"luminosity_solar":435.7124805030843,"wikipedia_article":"Electra (star)","radial_velocity_km_s":12,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":3.03,"surface_temperature_k":14655,"proper_motion_ra_mas_yr":21.55,"proper_motion_dec_mas_yr":-44.92,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"17 Tau"},{"catalog":"Common name","designation":"Electra"},{"catalog":"HD","designation":"HD 23302"},{"catalog":"HIP","designation":"HIP 17499"},{"catalog":"HR","designation":"HR 1142"},{"catalog":"IRAS","designation":"IRAS 03418+2357"}],"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."}