{"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":"2026-09-02T22:54:49.867Z","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-124309","name":"HD 124309","class":"k1iiicnib_ii_orange_giant","category":"star","object_type":"K1IIICNIb/II orange giant","mag":7.76,"mag_band":"V","abs_mag":1.139,"abs_mag_band":"V","distance_ly":688.0937408509021,"distance_method":"parallax","ra_deg":213.541965,"dec_deg":-48.577473,"epoch_ra_deg":213.977963,"epoch_dec_deg":-48.703079,"epoch_moved_arcsec":0.543,"pm_ra_mas_yr":-19.03,"pm_dec_mas_yr":-7.19,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-124309","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"mass_solar":4.002,"radius_solar":19.318,"spectral_type":"K1IIICNIb/II","color_index_bv":1.237,"luminosity_solar":30.507034978225157,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","surface_gravity_log_g":2.375,"surface_temperature_k":4772,"proper_motion_ra_mas_yr":-19.03,"proper_motion_dec_mas_yr":-7.19,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":171.4635},"designations":[{"catalog":"HD","designation":"HD 124309"},{"catalog":"HIP","designation":"HIP 69542"}],"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."}