{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-02T22:18:19.262Z","years_from_j2000":26.671,"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-74010","name":"HD 74010","class":"ka8hf2mf2_yellow_white_star","category":"star","object_type":"kA8hF2mF2 yellow-white star","mag":7.69,"mag_band":"V","abs_mag":1.906,"abs_mag_band":"V","distance_ly":467.94307823776614,"distance_method":"parallax","ra_deg":130.85596500000003,"dec_deg":48.861635,"epoch_ra_deg":131.329663,"epoch_dec_deg":48.764737,"epoch_moved_arcsec":2.344,"pm_ra_mas_yr":-71.13,"pm_dec_mas_yr":-51.61,"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-74010","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08435+4852","age_years":1499947700,"companions":[{"measured":2021,"magnitude":7.87,"components":null,"discoverer_code":"STF1258","separation_arcsec":10.2,"position_angle_deg":331}],"mass_solar":1.656,"radius_solar":2.285,"spectral_type":"kA8hF2mF2","color_index_bv":0.362,"luminosity_solar":15.052200686321289,"radial_velocity_km_s":22.2,"spectral_type_source":"SIMBAD (2008ApJS..176..216A, quality D)","surface_gravity_log_g":3.852,"surface_temperature_k":6891,"proper_motion_ra_mas_yr":-71.13,"proper_motion_dec_mas_yr":-51.61,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":10.6782},"designations":[{"catalog":"HD","designation":"HD 74010"},{"catalog":"HIP","designation":"HIP 42812"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","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."}