{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T20:11:56.394Z","years_from_j2000":26.676,"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-165893","name":"HD 165893","class":"k3_5vk_orange_dwarf","category":"star","object_type":"K3.5Vk: orange dwarf","mag":8.88,"mag_band":"V","abs_mag":6.301,"abs_mag_band":"V","distance_ly":106.97146413802665,"distance_method":"parallax","ra_deg":272.30071499999997,"dec_deg":-22.183736,"epoch_ra_deg":272.705719,"epoch_dec_deg":-22.180173,"epoch_moved_arcsec":2.46,"pm_ra_mas_yr":-7.29,"pm_dec_mas_yr":-91.93,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-165893","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18092-2211","companions":[{"measured":2021,"magnitude":9.92,"components":null,"discoverer_code":"RST3157","separation_arcsec":0.1,"position_angle_deg":143}],"spectral_type":"K3.5Vk:","color_index_bv":1.075,"luminosity_solar":0.2627846540838492,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","proper_motion_ra_mas_yr":-7.29,"proper_motion_dec_mas_yr":-91.93},"designations":[{"catalog":"HD","designation":"HD 165893"},{"catalog":"HIP","designation":"HIP 88932"}],"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."}