{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T20:48:56.197Z","years_from_j2000":26.67,"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-112357","name":"HD 112357","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":7.22,"mag_band":"V","abs_mag":2.643,"abs_mag_band":"V","distance_ly":268.4413758978771,"distance_method":"parallax","ra_deg":194.07171,"dec_deg":-19.631523,"epoch_ra_deg":194.427146,"epoch_dec_deg":-19.776884,"epoch_moved_arcsec":3.288,"pm_ra_mas_yr":-122.73,"pm_dec_mas_yr":11.53,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corvus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-112357","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":2166953800,"mass_solar":1.62,"radius_solar":3.333,"spectral_type":"K0III","uncertainties":{"metallicity_fe_h":[0.08,0.08]},"color_index_bv":0.891,"luminosity_solar":7.634841051830966,"metallicity_fe_h":-0.22,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":3.555,"surface_temperature_k":5588,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-122.73,"proper_motion_dec_mas_yr":11.53,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":8.5882},"designations":[{"catalog":"HD","designation":"HD 112357"},{"catalog":"HIP","designation":"HIP 63142"}],"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."}