{"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":"2026-09-02T17:46:29.327Z","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-174897","name":"HD 174897","class":"k0_orange_star","category":"star","object_type":"K0 orange star","mag":6.55,"mag_band":"V","abs_mag":1.321,"abs_mag_band":"V","distance_ly":362.3959390012285,"distance_method":"parallax","ra_deg":283.07764499999996,"dec_deg":14.535496,"epoch_ra_deg":283.38385,"epoch_dec_deg":14.567277,"epoch_moved_arcsec":0.753,"pm_ra_mas_yr":12.19,"pm_dec_mas_yr":-25.46,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hercules","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-174897","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18523+1432","companions":[{"measured":2019,"magnitude":9.61,"components":"AB","discoverer_code":"STF2411","separation_arcsec":13.3,"position_angle_deg":95},{"measured":2017,"magnitude":11.01,"components":"AC","discoverer_code":"WAL  97","separation_arcsec":60.1,"position_angle_deg":87},{"measured":2017,"magnitude":10.9,"components":"AD","discoverer_code":"WAL  97","separation_arcsec":83.8,"position_angle_deg":118}],"spectral_type":"K0","color_index_bv":1.05,"luminosity_solar":25.798829360403722,"radial_velocity_km_s":11.5,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":12.19,"proper_motion_dec_mas_yr":-25.46},"designations":[{"catalog":"HD","designation":"HD 174897"},{"catalog":"HIP","designation":"HIP 92620"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}