{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T17:39:10.657Z","years_from_j2000":26.678,"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-161868","name":"62 γ Oph","class":"a1vnka0ma0_white_main_sequence_star","category":"star","object_type":"A1VnkA0mA0 white main-sequence star","mag":3.75,"mag_band":"V","abs_mag":1.257,"abs_mag_band":"V","distance_ly":102.79111784483113,"distance_method":"parallax","ra_deg":266.973165,"dec_deg":2.707276,"epoch_ra_deg":267.310116,"epoch_dec_deg":2.696976,"epoch_moved_arcsec":2.097,"pm_ra_mas_yr":-23.15,"pm_dec_mas_yr":-75.12,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ophiuchus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-161868","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17479+0242","companions":[{"measured":2012,"magnitude":17.9,"components":"AB","discoverer_code":"JNN 243","separation_arcsec":6.1,"position_angle_deg":269},{"measured":2012,"magnitude":18.5,"components":"AC","discoverer_code":"JNN 243","separation_arcsec":7.2,"position_angle_deg":57}],"spectral_type":"A1VnkA0mA0","uncertainties":{"metallicity_fe_h":[0.15,0.15]},"color_index_bv":0.043,"luminosity_solar":27.365286541924664,"metallicity_fe_h":-0.21,"radial_velocity_km_s":-7,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.1,"surface_temperature_k":10040,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-23.15,"proper_motion_dec_mas_yr":-75.12,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"62 Gamma Oph"},{"catalog":"HD","designation":"HD 161868"},{"catalog":"HIP","designation":"HIP 87108"},{"catalog":"HR","designation":"HR 6629"}],"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."}