{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T13:10:22.420Z","years_from_j2000":26.664,"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":"gudja","name":"Gudja","class":"m0_5iiiab_red_giant","category":"star","object_type":"M0.5IIIab red giant","mag":4.09,"mag_band":"V","abs_mag":-1.253,"abs_mag_band":"V","distance_ly":381.9160720511979,"distance_method":"parallax","ra_deg":237.184905,"dec_deg":18.141564,"epoch_ra_deg":237.487757,"epoch_dec_deg":18.058288,"epoch_moved_arcsec":2.739,"pm_ra_mas_yr":-51.78,"pm_dec_mas_yr":-88.72,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Serpens","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/gudja","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"M0.5IIIab","color_index_bv":1.616,"luminosity_solar":276.18494420752944,"radial_velocity_km_s":-39,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","surface_temperature_k":3575,"proper_motion_ra_mas_yr":-51.78,"proper_motion_dec_mas_yr":-88.72,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"35 Kappa Ser"},{"catalog":"Common name","designation":"Gudja"},{"catalog":"HD","designation":"HD 141477"},{"catalog":"HIP","designation":"HIP 77450"},{"catalog":"HR","designation":"HR 5879"}],"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."}