{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T02:05:36.167Z","years_from_j2000":26.679,"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-174080","name":"HD 174080","class":"k0_orange_star","category":"star","object_type":"K0 orange star","mag":7.97,"mag_band":"V","abs_mag":6.836,"abs_mag_band":"V","distance_ly":54.991922221309245,"distance_method":"parallax","ra_deg":282.12177,"dec_deg":10.74545,"epoch_ra_deg":282.439072,"epoch_dec_deg":10.771785,"epoch_moved_arcsec":12.151,"pm_ra_mas_yr":128.76,"pm_dec_mas_yr":-436.85,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aquila","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-174080","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18485+1045","age_years":9770692000,"companions":[{"measured":2015,"magnitude":11.25,"components":"AB","discoverer_code":"STF2396","separation_arcsec":82,"position_angle_deg":337},{"measured":2015,"magnitude":10.14,"components":"AC","discoverer_code":"STF2396","separation_arcsec":203.2,"position_angle_deg":5},{"measured":2015,"magnitude":10.83,"components":"AD","discoverer_code":"STF2396","separation_arcsec":203.7,"position_angle_deg":35}],"mass_solar":0.748,"radius_solar":0.785,"spectral_type":"K0","uncertainties":{"metallicity_fe_h":[0.104,0.104]},"color_index_bv":1.07,"luminosity_solar":0.1605461886800971,"metallicity_fe_h":0.13,"variable_mag_max":7.946,"variable_mag_min":8.076,"radial_velocity_km_s":-8.4,"spectral_type_source":"SIMBAD (2010MNRAS.403.1949K, quality D)","surface_gravity_log_g":4.535,"surface_temperature_k":4542,"metallicity_fe_h_source":"Median of 4 spectroscopic determinations in 5 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":128.76,"proper_motion_dec_mas_yr":-436.85,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.2357},"designations":[{"catalog":"Gliese","designation":"Gl 727"},{"catalog":"HD","designation":"HD 174080"},{"catalog":"HIP","designation":"HIP 92283"}],"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."}