{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T05:41:21.850Z","years_from_j2000":26.671,"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-34642","name":"ο Col","class":"k1iv_orange_subgiant","category":"star","object_type":"K1IV orange subgiant","mag":4.81,"mag_band":"V","abs_mag":2.254,"abs_mag_band":"V","distance_ly":105.82632909586316,"distance_method":"parallax","ra_deg":79.371165,"dec_deg":-34.895207,"epoch_ra_deg":79.613873,"epoch_dec_deg":-34.868181,"epoch_moved_arcsec":9.317,"pm_ra_mas_yr":93.71,"pm_dec_mas_yr":-336.53,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Columba","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-34642","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05175-3454","companions":[{"measured":2015,"magnitude":15.4,"components":null,"discoverer_code":"KIR  12","separation_arcsec":158.3,"position_angle_deg":336}],"spectral_type":"K1IV","uncertainties":{"metallicity_fe_h":[0.066,0.066]},"color_index_bv":0.987,"luminosity_solar":10.924460532267922,"metallicity_fe_h":-0.04,"radial_velocity_km_s":21,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":3.3,"surface_temperature_k":4865,"metallicity_fe_h_source":"Median of 5 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":93.71,"proper_motion_dec_mas_yr":-336.53,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Omicron Col"},{"catalog":"HD","designation":"HD 34642"},{"catalog":"HIP","designation":"HIP 24659"},{"catalog":"HR","designation":"HR 1743"}],"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."}