{"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":"2026-09-05T21:52:47.089Z","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-178613","name":"HD 178613","class":"g0iv_yellow_subgiant","category":"star","object_type":"G0IV yellow subgiant","mag":8.34,"mag_band":"V","abs_mag":-0.336,"abs_mag_band":"V","distance_ly":1772.5891369565359,"distance_method":"parallax","ra_deg":286.800705,"dec_deg":44.841747,"epoch_ra_deg":287.001818,"epoch_dec_deg":44.883094,"epoch_moved_arcsec":0.22,"pm_ra_mas_yr":0.01,"pm_dec_mas_yr":8.24,"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-178613","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19072+4451","companions":[{"measured":2016,"magnitude":9.28,"components":"AB","discoverer_code":"A   703","separation_arcsec":0.6,"position_angle_deg":189}],"spectral_type":"G0IV","uncertainties":{"metallicity_fe_h":[0.22,0.22]},"color_index_bv":0.704,"luminosity_solar":118.68613846449205,"metallicity_fe_h":0.15,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2013MNRAS.434.1422M, quality C)","surface_gravity_log_g":3.92,"surface_temperature_k":5946,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":0.01,"proper_motion_dec_mas_yr":8.24,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 178613"},{"catalog":"HIP","designation":"HIP 93898"}],"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."}