{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T03:35:57.210Z","years_from_j2000":26.674,"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-233453","name":"HD 233453","class":"k3_5v_orange_dwarf","category":"star","object_type":"K3.5V orange dwarf","mag":8.86,"mag_band":"V","abs_mag":6.73,"abs_mag_band":"V","distance_ly":86.97514277659081,"distance_method":"parallax","ra_deg":117.165045,"dec_deg":53.648572,"epoch_ra_deg":117.689061,"epoch_dec_deg":53.577827,"epoch_moved_arcsec":14.486,"pm_ra_mas_yr":-124.85,"pm_dec_mas_yr":-528.53,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lynx","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-233453","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07487+5339","companions":[{"measured":2017,"magnitude":12.9,"components":null,"discoverer_code":"A  1331","separation_arcsec":5.3,"position_angle_deg":254}],"spectral_type":"K3.5V","color_index_bv":1.068,"luminosity_solar":0.17701089583174198,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","proper_motion_ra_mas_yr":-124.85,"proper_motion_dec_mas_yr":-528.53},"designations":[{"catalog":"HD","designation":"HD 233453"},{"catalog":"HIP","designation":"HIP 38117"}],"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."}