{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T11:04:35.281Z","years_from_j2000":26.669,"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-82285","name":"HD 82285","class":"f5_yellow_white_star","category":"star","object_type":"F5 yellow-white star","mag":8.26,"mag_band":"V","abs_mag":1.492,"abs_mag_band":"V","distance_ly":736.2445330496028,"distance_method":"parallax","ra_deg":143.581425,"dec_deg":66.795028,"epoch_ra_deg":144.134392,"epoch_dec_deg":66.675476,"epoch_moved_arcsec":0.946,"pm_ra_mas_yr":-22.37,"pm_dec_mas_yr":-27.51,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-82285","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"09343+6648","age_years":1553210400,"companions":[{"measured":2021,"magnitude":8.31,"components":"AB","discoverer_code":"STF1350","separation_arcsec":10.3,"position_angle_deg":69},{"measured":2015,"magnitude":9.16,"components":"AC","discoverer_code":"STF1350","separation_arcsec":131,"position_angle_deg":216}],"mass_solar":1.748,"radius_solar":2.919,"spectral_type":"F5","color_index_bv":0.453,"luminosity_solar":22.03941181810109,"radial_velocity_km_s":-54,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":3.714,"surface_temperature_k":6506,"proper_motion_ra_mas_yr":-22.37,"proper_motion_dec_mas_yr":-27.51,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":13.9649},"designations":[{"catalog":"HD","designation":"HD 82285"},{"catalog":"HIP","designation":"HIP 46964"}],"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."}