{"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":"2026-09-02T19:03:33.411Z","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-31337","name":"HD 31337","class":"f8v_g0v_yellow_white_main_sequence_star","category":"star","object_type":"F8V+G0V yellow-white main-sequence star","mag":8.36,"mag_band":"V","abs_mag":3.654,"abs_mag_band":"V","distance_ly":284.85258635545046,"distance_method":"parallax","ra_deg":74.77131,"dec_deg":63.368414,"epoch_ra_deg":75.401774,"epoch_dec_deg":63.409059,"epoch_moved_arcsec":1.11,"pm_ra_mas_yr":-41.05,"pm_dec_mas_yr":-6.84,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Camelopardalis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-31337","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04591+6322","companions":[{"measured":2012,"magnitude":9.37,"components":null,"discoverer_code":"HU 1090","separation_arcsec":0.2,"position_angle_deg":291}],"spectral_type":"F8V+G0V","color_index_bv":0.579,"luminosity_solar":3.008846276645725,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1969AJ.....74..689S, quality C)","proper_motion_ra_mas_yr":-41.05,"proper_motion_dec_mas_yr":-6.84},"designations":[{"catalog":"HD","designation":"HD 31337"},{"catalog":"HIP","designation":"HIP 23170"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T18:38:07.546Z","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."}