{"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":"2026-08-27T19:36:45.468Z","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-12703","name":"HD 12703","class":"f3_5v_yellow_white_main_sequence_star","category":"star","object_type":"F3/5V yellow-white main-sequence star","mag":8.71,"mag_band":"V","abs_mag":2.734,"abs_mag_band":"V","distance_ly":511.2168541204682,"distance_method":"parallax","ra_deg":31.029045,"dec_deg":-12.305959,"epoch_ra_deg":31.356703,"epoch_dec_deg":-12.177023,"epoch_moved_arcsec":0.452,"pm_ra_mas_yr":10.15,"pm_dec_mas_yr":-13.58,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-12703","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02041-1218","age_years":2321540400,"companions":[{"measured":2017,"magnitude":11.18,"components":null,"discoverer_code":"RST3365","separation_arcsec":1.3,"position_angle_deg":146}],"mass_solar":1.387,"radius_solar":1.77,"spectral_type":"F3/5V","color_index_bv":0.4,"luminosity_solar":7.021016602403144,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality D)","surface_gravity_log_g":4.021,"surface_temperature_k":6533,"proper_motion_ra_mas_yr":10.15,"proper_motion_dec_mas_yr":-13.58,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":4.9811},"designations":[{"catalog":"HD","designation":"HD 12703"},{"catalog":"HIP","designation":"HIP 9653"}],"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."}