{"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":"2026-08-31T12:31:36.496Z","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":"maia","name":"Maia","class":"b8iii_blue_white_giant","category":"star","object_type":"B8III blue-white giant","mag":3.87,"mag_band":"V","abs_mag":-1.48,"abs_mag_band":"V","distance_ly":383.26244557841255,"distance_method":"parallax","ra_deg":56.456685,"dec_deg":24.367748,"epoch_ra_deg":56.856906,"epoch_dec_deg":24.451504,"epoch_moved_arcsec":1.326,"pm_ra_mas_yr":21.09,"pm_dec_mas_yr":-45.03,"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/maia","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03458+2422","companions":[{"measured":2015,"magnitude":13.72,"components":"AB","discoverer_code":"HL   11","separation_arcsec":113.4,"position_angle_deg":73}],"wikidata_id":"Q13434","spectral_type":"B8III","color_index_bv":-0.063,"luminosity_solar":340.4081897010009,"metallicity_fe_h":1.1,"wikipedia_article":"Maia (star)","radial_velocity_km_s":8,"surface_gravity_log_g":3.5,"surface_temperature_k":13786,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":21.09,"proper_motion_dec_mas_yr":-45.03,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"20 Tau"},{"catalog":"Common name","designation":"Maia"},{"catalog":"HR","designation":"HR 1149"},{"catalog":"IRAS","designation":"IRAS 03428+2412"}],"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."}