{"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":"2026-08-27T20:45:35.345Z","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":"hd-80081","name":"38 Lyn","class":"a1v_white_main_sequence_star","category":"star","object_type":"A1V white main-sequence star","mag":3.82,"mag_band":"V","abs_mag":0.906,"abs_mag_band":"V","distance_ly":124.82069806495315,"distance_method":"parallax","ra_deg":139.711035,"dec_deg":36.802597,"epoch_ra_deg":140.127841,"epoch_dec_deg":36.688824,"epoch_moved_arcsec":3.412,"pm_ra_mas_yr":-32.61,"pm_dec_mas_yr":-123.78,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lynx","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-80081","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"09188+3648","companions":[{"measured":2022,"magnitude":6.09,"components":"AB","discoverer_code":"STF1334","separation_arcsec":2.5,"position_angle_deg":222},{"measured":2022,"magnitude":14.7,"components":"AE","discoverer_code":"DRS  44","separation_arcsec":101.1,"position_angle_deg":52}],"spectral_type":"A1V","color_index_bv":0.066,"luminosity_solar":37.80941866832965,"radial_velocity_km_s":4,"spectral_type_source":"SIMBAD (1995ApJS...99..135A, quality C)","surface_temperature_k":9183,"proper_motion_ra_mas_yr":-32.61,"proper_motion_dec_mas_yr":-123.78,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"38 Lyn"},{"catalog":"HD","designation":"HD 80081"},{"catalog":"HIP","designation":"HIP 45688"},{"catalog":"HR","designation":"HR 3690"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}