{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T13:00:05.768Z","years_from_j2000":26.664,"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":"rigel","name":"Rigel","class":"b8ia_blue_white_supergiant","category":"star","object_type":"B8Ia blue-white supergiant","mag":0.18,"mag_band":"V","abs_mag":-6.933,"abs_mag_band":"V","distance_ly":862.8476757187779,"distance_method":"parallax","ra_deg":78.63447,"dec_deg":-8.20164,"epoch_ra_deg":78.957428,"epoch_dec_deg":-8.170325,"epoch_moved_arcsec":0.052,"pm_ra_mas_yr":1.87,"pm_dec_mas_yr":-0.56,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Orion","discovered":"Antiquity","featured":true,"url":"https://spacecatalog.org/object/rigel","radius_km":null,"radius_kind":null,"data_quality":null,"description":"A blue supergiant tens of thousands of times more luminous than the Sun, lighting the Witch Head Nebula from twelve light-years away.","properties":{"wds_id":"05145-0812","companions":[{"measured":2023,"magnitude":6.8,"components":"A,BC","discoverer_code":"STF 668","separation_arcsec":9.4,"position_angle_deg":204},{"measured":2017,"magnitude":15.4,"components":"AD","discoverer_code":"BU  555","separation_arcsec":44.5,"position_angle_deg":1}],"wikidata_id":"Q12126","also_known_as":["Beta Ori","Beta Orionis","Beta Orionis A","bet Ori A","β Ori","β Ori A","β Orionis","β Orionis A"],"spectral_type":"B8Ia","color_index_bv":-0.03,"luminosity_solar":51665.42425669497,"wikipedia_article":"Rigel","radial_velocity_km_s":21,"spectral_type_source":"SIMBAD (2024A&A...690A.176N, quality C)","surface_gravity_log_g":1.75,"surface_temperature_k":12115,"proper_motion_ra_mas_yr":1.87,"proper_motion_dec_mas_yr":-0.56,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"19 Beta Ori"},{"catalog":"Common name","designation":"Rigel"},{"catalog":"HD","designation":"HD 34085"},{"catalog":"HIP","designation":"HIP 24436"},{"catalog":"HR","designation":"HR 1713"},{"catalog":"IRAS","designation":"IRAS 05121-0815"}],"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."}