{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T20:20:33.427Z","years_from_j2000":26.668,"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":"intercrus","name":"Intercrus","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":5.4,"mag_band":"V","abs_mag":0.732,"abs_mag_band":"V","distance_ly":279.9625237843433,"distance_method":"parallax","ra_deg":142.16662499999998,"dec_deg":45.601483,"epoch_ra_deg":142.605383,"epoch_dec_deg":45.483547,"epoch_moved_arcsec":3.423,"pm_ra_mas_yr":-6.4,"pm_dec_mas_yr":-128.2,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/intercrus","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"09287+4536","age_years":502862500,"companions":[{"measured":2017,"magnitude":7.8,"components":"AB","discoverer_code":"S   598","separation_arcsec":69.7,"position_angle_deg":160},{"measured":2015,"magnitude":10.93,"components":"AC","discoverer_code":"S   598","separation_arcsec":83.7,"position_angle_deg":73}],"mass_solar":2.7,"radius_solar":10.53,"spectral_type":"K0III","uncertainties":{"metallicity_fe_h":[0.064,0.064]},"color_index_bv":0.993,"luminosity_solar":44.38129803081385,"metallicity_fe_h":-0.24,"radial_velocity_km_s":39,"spectral_type_source":"SIMBAD (1990A&AS...85.1069S, quality C)","surface_gravity_log_g":2.688,"surface_temperature_k":5026,"metallicity_fe_h_source":"Median of 7 spectroscopic determinations in 8 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-6.4,"proper_motion_dec_mas_yr":-128.2,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":61.4101},"designations":[{"catalog":"Common name","designation":"Intercrus"},{"catalog":"HD","designation":"HD 81688"},{"catalog":"HIP","designation":"HIP 46471"},{"catalog":"HR","designation":"HR 3743"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}