{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T07:22:21.191Z","years_from_j2000":26.669,"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-157802","name":"HD 157802","class":"fm_dd_yellow_white_star","category":"star","object_type":"Fm_dD yellow-white star","mag":6.74,"mag_band":"V","abs_mag":2.211,"abs_mag_band":"V","distance_ly":262.6057859877691,"distance_method":"parallax","ra_deg":262.370715,"dec_deg":-61.76385,"epoch_ra_deg":262.990149,"epoch_dec_deg":-61.785249,"epoch_moved_arcsec":0.443,"pm_ra_mas_yr":-13.98,"pm_dec_mas_yr":-8.98,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ara","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-157802","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17295-6146","companions":[{"measured":2025,"magnitude":9,"components":"AB","discoverer_code":"I   598","separation_arcsec":0.6,"position_angle_deg":78},{"measured":2016,"magnitude":13.3,"components":"AC","discoverer_code":"I   598","separation_arcsec":15.9,"position_angle_deg":31},{"measured":2016,"magnitude":13.1,"components":"AD","discoverer_code":"I   598","separation_arcsec":52.5,"position_angle_deg":268}],"spectral_type":"Fm_dD","color_index_bv":0.374,"luminosity_solar":11.36579974750152,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality D)","surface_temperature_k":6880,"proper_motion_ra_mas_yr":-13.98,"proper_motion_dec_mas_yr":-8.98,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 157802"},{"catalog":"HIP","designation":"HIP 85598"}],"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."}