{"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":"2026-09-01T21:59:39.002Z","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":"belel","name":"Belel","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":7.55,"mag_band":"V","abs_mag":2.331,"abs_mag_band":"V","distance_ly":360.792554248373,"distance_method":"parallax","ra_deg":290.26764,"dec_deg":-23.619572,"epoch_ra_deg":290.672783,"epoch_dec_deg":-23.569698,"epoch_moved_arcsec":1.464,"pm_ra_mas_yr":-45.15,"pm_dec_mas_yr":-31.23,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/belel","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":6331349000,"mass_solar":1.19,"wikidata_id":"Q4039880","radius_solar":5.547,"spectral_type":"K0III","uncertainties":{"metallicity_fe_h":[0.045,0.045]},"color_index_bv":1.022,"luminosity_solar":10.17653662620533,"metallicity_fe_h":0.2,"wikipedia_article":"HD 181342","radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":2.907,"surface_temperature_k":4785,"metallicity_fe_h_source":"Median of 8 spectroscopic determinations in 6 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-45.15,"proper_motion_dec_mas_yr":-31.23,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":14.6091},"designations":[{"catalog":"Common name","designation":"Belel"},{"catalog":"HD","designation":"HD 181342"},{"catalog":"HIP","designation":"HIP 95124"},{"catalog":"IRAS","designation":"IRAS 19179-2342"}],"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."}