{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T08:12:57.395Z","years_from_j2000":26.666,"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-37124","name":"HD 37124","class":"g4iv_v_yellow_subgiant","category":"star","object_type":"G4IV-V yellow subgiant","mag":7.68,"mag_band":"V","abs_mag":5.044,"abs_mag_band":"V","distance_ly":109.81685237722752,"distance_method":"parallax","ra_deg":84.26037000000001,"dec_deg":20.730788,"epoch_ra_deg":84.659954,"epoch_dec_deg":20.744413,"epoch_moved_arcsec":11.399,"pm_ra_mas_yr":-79.75,"pm_dec_mas_yr":-419.96,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-37124","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05370+2044","age_years":12169624000,"companions":[{"measured":2003,"magnitude":17,"components":"AB","discoverer_code":"RBR  15","separation_arcsec":3,"position_angle_deg":160},{"measured":2016,"magnitude":16.9,"components":"AC","discoverer_code":"RBR  15","separation_arcsec":6.9,"position_angle_deg":345}],"mass_solar":0.88,"radius_solar":0.979,"spectral_type":"G4IV-V","color_index_bv":0.667,"luminosity_solar":0.8363729915840259,"radial_velocity_km_s":-23.2,"spectral_type_source":"SIMBAD (2000Priv..C......0F, quality D)","surface_gravity_log_g":4.402,"surface_temperature_k":5488,"proper_motion_ra_mas_yr":-79.75,"proper_motion_dec_mas_yr":-419.96,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.7741},"designations":[{"catalog":"Gliese","designation":"Gl 209"},{"catalog":"HD","designation":"HD 37124"},{"catalog":"HIP","designation":"HIP 26381"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}