{"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":"2026-09-02T16:17:42.265Z","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":"hip-70779","name":"HIP 70779","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":9.89,"mag_band":"V","abs_mag":2.719,"abs_mag_band":"V","distance_ly":886.2944054000791,"distance_method":"parallax","ra_deg":217.12935,"dec_deg":38.261498,"epoch_ra_deg":217.403371,"epoch_dec_deg":38.141115,"epoch_moved_arcsec":0.606,"pm_ra_mas_yr":-22.35,"pm_dec_mas_yr":-4.07,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Boötes","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-70779","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":502791640,"mass_solar":2.701,"radius_solar":10.029,"spectral_type":"K0III","color_index_bv":0.966,"luminosity_solar":7.118688672622804,"variable_mag_max":9.836,"variable_mag_min":9.946,"radial_velocity_km_s":0,"surface_gravity_log_g":2.719,"surface_temperature_k":5037,"proper_motion_ra_mas_yr":-22.35,"proper_motion_dec_mas_yr":-4.07,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":59.7422},"designations":[{"catalog":"HIP","designation":"HIP 70779"}],"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."}