{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T09:30:50.660Z","years_from_j2000":26.68,"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-185837","name":"HD 185837","class":"a3iv_white_subgiant","category":"star","object_type":"A3IV white subgiant","mag":6.1,"mag_band":"V","abs_mag":0.221,"abs_mag_band":"V","distance_ly":488.9899492918276,"distance_method":"parallax","ra_deg":294.93717,"dec_deg":33.978938,"epoch_ra_deg":295.189272,"epoch_dec_deg":34.040307,"epoch_moved_arcsec":0.34,"pm_ra_mas_yr":-3.62,"pm_dec_mas_yr":12.23,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-185837","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19397+3359","companions":[{"measured":2015,"magnitude":9.61,"components":"AB","discoverer_code":"HO  111","separation_arcsec":1.3,"position_angle_deg":19},{"measured":2015,"magnitude":11.7,"components":"AC","discoverer_code":"HO  111","separation_arcsec":25.4,"position_angle_deg":169}],"spectral_type":"A3IV","color_index_bv":0.094,"luminosity_solar":71.05587633694735,"radial_velocity_km_s":-33,"spectral_type_source":"SIMBAD (quality C)","proper_motion_ra_mas_yr":-3.62,"proper_motion_dec_mas_yr":12.23},"designations":[{"catalog":"HD","designation":"HD 185837"},{"catalog":"HIP","designation":"HIP 96724"},{"catalog":"HR","designation":"HR 7481"}],"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."}