{"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":"2026-09-05T19:21:45.667Z","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-174585","name":"8 ν¹ Lyr","class":"b3iv_blue_white_subgiant","category":"star","object_type":"B3IV blue-white subgiant","mag":5.93,"mag_band":"V","abs_mag":-2.089,"abs_mag_band":"V","distance_ly":1309.8648869186154,"distance_method":"parallax","ra_deg":282.44129999999996,"dec_deg":32.81282,"epoch_ra_deg":282.690999,"epoch_dec_deg":32.843083,"epoch_moved_arcsec":0.147,"pm_ra_mas_yr":1.87,"pm_dec_mas_yr":-5.19,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lyra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-174585","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18498+3249","companions":[{"measured":2015,"magnitude":13,"components":"AB","discoverer_code":"H 5  40","separation_arcsec":33.7,"position_angle_deg":76},{"measured":2015,"magnitude":11.2,"components":"AC","discoverer_code":"H 5  40","separation_arcsec":57.5,"position_angle_deg":120},{"measured":2015,"magnitude":12.92,"components":"AF","discoverer_code":"WAL  95","separation_arcsec":70.5,"position_angle_deg":349},{"measured":2008,"magnitude":11.64,"components":"AE","discoverer_code":"WAL  95","separation_arcsec":80,"position_angle_deg":350}],"spectral_type":"B3IV","color_index_bv":-0.154,"luminosity_solar":596.4856499193785,"radial_velocity_km_s":-17,"spectral_type_source":"SIMBAD (quality C)","proper_motion_ra_mas_yr":1.87,"proper_motion_dec_mas_yr":-5.19},"designations":[{"catalog":"Bayer/Flamsteed","designation":"8 Nu1 Lyr"},{"catalog":"HD","designation":"HD 174585"},{"catalog":"HIP","designation":"HIP 92398"},{"catalog":"HR","designation":"HR 7100"}],"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."}