{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T09:38:44.631Z","years_from_j2000":26.672,"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-37329","name":"HD 37329","class":"g9iii_yellow_giant","category":"star","object_type":"G9III yellow giant","mag":6.45,"mag_band":"V","abs_mag":1.332,"abs_mag_band":"V","distance_ly":344.41004555203864,"distance_method":"parallax","ra_deg":84.73904999999999,"dec_deg":26.618068,"epoch_ra_deg":85.157758,"epoch_dec_deg":26.633441,"epoch_moved_arcsec":0.458,"pm_ra_mas_yr":13.55,"pm_dec_mas_yr":-10.52,"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-37329","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05390+2637","age_years":454708760,"companions":[{"measured":1935,"magnitude":7.3,"components":null,"discoverer_code":"OCC 210","separation_arcsec":0.1,"position_angle_deg":-1}],"mass_solar":2.802,"radius_solar":10.158,"spectral_type":"G9III","color_index_bv":0.98,"luminosity_solar":25.538771357793223,"radial_velocity_km_s":15,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":2.716,"surface_temperature_k":5019,"proper_motion_ra_mas_yr":13.55,"proper_motion_dec_mas_yr":-10.52,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":59.1051},"designations":[{"catalog":"HD","designation":"HD 37329"},{"catalog":"HIP","designation":"HIP 26571"},{"catalog":"HR","designation":"HR 1921"}],"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."}