{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T19:57:35.639Z","years_from_j2000":26.673,"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-256294","name":"HD 256294","class":"b9iii_blue_white_giant","category":"star","object_type":"B9III blue-white giant","mag":9.73,"mag_band":"V","abs_mag":4.387,"abs_mag_band":"V","distance_ly":381.9160720511979,"distance_method":"parallax","ra_deg":95.788695,"dec_deg":8.907454,"epoch_ra_deg":96.157633,"epoch_dec_deg":8.894831,"epoch_moved_arcsec":5.989,"pm_ra_mas_yr":206.42,"pm_dec_mas_yr":88.35,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Monoceros","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-256294","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06232+0854","companions":[{"measured":2016,"magnitude":12.01,"components":"AD","discoverer_code":"ABH  44","separation_arcsec":14.1,"position_angle_deg":157},{"measured":2016,"magnitude":12.01,"components":"AB","discoverer_code":"HJ  726","separation_arcsec":22.3,"position_angle_deg":154},{"measured":2016,"magnitude":11.35,"components":"AC","discoverer_code":"HJ  726","separation_arcsec":23.1,"position_angle_deg":87},{"measured":2016,"magnitude":12.99,"components":"AE","discoverer_code":"ABH  44","separation_arcsec":59,"position_angle_deg":207},{"measured":2016,"magnitude":13.8,"components":"AF","discoverer_code":"ABH  44","separation_arcsec":85.9,"position_angle_deg":204}],"spectral_type":"B9III","color_index_bv":-0.056,"luminosity_solar":1.5317927158934164,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","proper_motion_ra_mas_yr":206.42,"proper_motion_dec_mas_yr":88.35},"designations":[{"catalog":"HD","designation":"HD 256294"},{"catalog":"HIP","designation":"HIP 30362"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","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."}