{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T12:39:57.838Z","years_from_j2000":26.672,"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-117902","name":"HD 117902","class":"f0iii_yellow_white_giant","category":"star","object_type":"F0III yellow-white giant","mag":6.78,"mag_band":"V","abs_mag":0.93,"abs_mag_band":"V","distance_ly":482.4798679926014,"distance_method":"parallax","ra_deg":203.21247,"dec_deg":34.907137,"epoch_ra_deg":203.516339,"epoch_dec_deg":34.768902,"epoch_moved_arcsec":1.19,"pm_ra_mas_yr":-42.86,"pm_dec_mas_yr":-12.39,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Canes Venatici","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-117902","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13329+3454","companions":[{"measured":2019,"magnitude":8.08,"components":"AB","discoverer_code":"STT 269","separation_arcsec":0.3,"position_angle_deg":222},{"measured":2015,"magnitude":9.18,"components":"AB,C","discoverer_code":"STT 269","separation_arcsec":123.7,"position_angle_deg":332},{"measured":2015,"magnitude":8.4,"components":"AB,D","discoverer_code":"ARN   8","separation_arcsec":351.6,"position_angle_deg":259}],"spectral_type":"F0III","color_index_bv":0.236,"luminosity_solar":36.98281797802661,"radial_velocity_km_s":-18,"spectral_type_source":"SIMBAD (quality D)","proper_motion_ra_mas_yr":-42.86,"proper_motion_dec_mas_yr":-12.39},"designations":[{"catalog":"HD","designation":"HD 117902"},{"catalog":"HIP","designation":"HIP 66089"}],"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."}