{"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":"2026-09-04T22:36:54.486Z","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-184860","name":"HD 184860","class":"k2_k7_orange_star","category":"star","object_type":"K2+K7 orange star","mag":8.38,"mag_band":"V","abs_mag":6.152,"abs_mag_band":"V","distance_ly":90.9780600003084,"distance_method":"parallax","ra_deg":294.19016999999997,"dec_deg":-10.443432,"epoch_ra_deg":294.557286,"epoch_dec_deg":-10.385839,"epoch_moved_arcsec":10.708,"pm_ra_mas_yr":-293.92,"pm_dec_mas_yr":-273.39,"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-184860","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19368-1027","companions":[{"measured":2018,"magnitude":10.09,"components":null,"discoverer_code":"STF2541","separation_arcsec":5.4,"position_angle_deg":326}],"spectral_type":"K2+K7","uncertainties":{"metallicity_fe_h":[0.03,0.03]},"color_index_bv":1.011,"luminosity_solar":0.30143938842794665,"metallicity_fe_h":-0.04,"radial_velocity_km_s":68,"spectral_type_source":"SIMBAD (1985ApJS...59..197B, quality D)","surface_gravity_log_g":4.54,"surface_temperature_k":4916,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-293.92,"proper_motion_dec_mas_yr":-273.39,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 764.1A"},{"catalog":"HD","designation":"HD 184860"},{"catalog":"HIP","designation":"HIP 96471"}],"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."}