{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T22:30:15.858Z","years_from_j2000":26.654,"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-175492","name":"113 Her","class":"g8iii_a0_5_yellow_giant","category":"star","object_type":"G8III+:+A0.5 yellow giant","mag":4.57,"mag_band":"V","abs_mag":-1.233,"abs_mag_band":"V","distance_ly":472.00633439136135,"distance_method":"parallax","ra_deg":283.68702,"dec_deg":22.645076,"epoch_ra_deg":283.970198,"epoch_dec_deg":22.678557,"epoch_moved_arcsec":0.173,"pm_ra_mas_yr":6.4,"pm_dec_mas_yr":1.03,"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-175492","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18547+2239","companions":[{"measured":2001,"magnitude":11.1,"components":"AB","discoverer_code":"BU  646","separation_arcsec":34.4,"position_angle_deg":37},{"measured":2001,"magnitude":11.1,"components":"AC","discoverer_code":"BU  646","separation_arcsec":36.9,"position_angle_deg":23}],"spectral_type":"G8III+:+A0.5","color_index_bv":0.782,"luminosity_solar":271.1440008688312,"metallicity_fe_h":-0.16,"radial_velocity_km_s":-24,"spectral_type_source":"SIMBAD (2002ApJS..143..513G, quality D)","surface_gravity_log_g":2.94,"surface_temperature_k":5080,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":6.4,"proper_motion_dec_mas_yr":1.03,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"113 Her"},{"catalog":"HD","designation":"HD 175492"},{"catalog":"HIP","designation":"HIP 92818"},{"catalog":"HR","designation":"HR 7133"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}