{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T04:38:17.069Z","years_from_j2000":26.669,"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-27372","name":"HD 27372","class":"g8_yellow_star","category":"star","object_type":"G8 yellow star","mag":7.51,"mag_band":"V","abs_mag":2.886,"abs_mag_band":"V","distance_ly":274.31153838402304,"distance_method":"parallax","ra_deg":64.935885,"dec_deg":14.27367,"epoch_ra_deg":65.314828,"epoch_dec_deg":14.337025,"epoch_moved_arcsec":6.179,"pm_ra_mas_yr":80.17,"pm_dec_mas_yr":-217.4,"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-27372","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04197+1416","age_years":8962893000,"companions":[{"measured":2016,"magnitude":13.18,"components":null,"discoverer_code":"GIC  45","separation_arcsec":215,"position_angle_deg":329}],"mass_solar":1.081,"radius_solar":4.303,"spectral_type":"G8","color_index_bv":0.991,"luminosity_solar":6.103795855585306,"radial_velocity_km_s":-18.8,"spectral_type_source":"SIMBAD (1951BSD...C04....0S, quality E)","surface_gravity_log_g":3.152,"surface_temperature_k":4934,"proper_motion_ra_mas_yr":80.17,"proper_motion_dec_mas_yr":-217.4,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":8.5964},"designations":[{"catalog":"HD","designation":"HD 27372"},{"catalog":"HIP","designation":"HIP 20197"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}