{"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":"2026-09-02T13:16:27.210Z","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-210758","name":"HD 210758","class":"k1iii_orange_giant","category":"star","object_type":"K1III orange giant","mag":8.95,"mag_band":"V","abs_mag":0.833,"abs_mag_band":"V","distance_ly":1370.4050552812641,"distance_method":"parallax","ra_deg":333.278025,"dec_deg":-29.538132,"epoch_ra_deg":333.661027,"epoch_dec_deg":-29.405592,"epoch_moved_arcsec":0.659,"pm_ra_mas_yr":10.9,"pm_dec_mas_yr":-22.18,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Piscis Austrinus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-210758","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":736539100,"mass_solar":2.356,"radius_solar":11.548,"spectral_type":"K1III","color_index_bv":1.169,"luminosity_solar":40.438962050781946,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality C)","surface_gravity_log_g":2.372,"surface_temperature_k":4564,"proper_motion_ra_mas_yr":10.9,"proper_motion_dec_mas_yr":-22.18,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":52.6084},"designations":[{"catalog":"HD","designation":"HD 210758"},{"catalog":"HIP","designation":"HIP 109684"}],"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."}