{"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":"2026-09-02T11:04:25.257Z","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-92531","name":"HD 92531","class":"a0_white_star","category":"star","object_type":"A0 white star","mag":8.78,"mag_band":"V","abs_mag":-0.282,"abs_mag_band":"V","distance_ly":2117.8983956419397,"distance_method":"parallax","ra_deg":160.048245,"dec_deg":-46.975548,"epoch_ra_deg":160.335509,"epoch_dec_deg":-47.115427,"epoch_moved_arcsec":0.116,"pm_ra_mas_yr":-1.01,"pm_dec_mas_yr":-4.23,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-92531","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"10402-4659","age_years":382738560,"companions":[{"measured":2016,"magnitude":10.36,"components":"AB","discoverer_code":"B  1168","separation_arcsec":2,"position_angle_deg":119},{"measured":2015,"magnitude":11.3,"components":"AC","discoverer_code":"B  1168","separation_arcsec":28.1,"position_angle_deg":332}],"mass_solar":2.519,"radius_solar":2.611,"spectral_type":"A0","color_index_bv":0.209,"luminosity_solar":112.9275744209416,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality E)","surface_gravity_log_g":3.992,"surface_temperature_k":9791,"proper_motion_ra_mas_yr":-1.01,"proper_motion_dec_mas_yr":-4.23,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":56.4418},"designations":[{"catalog":"HD","designation":"HD 92531"},{"catalog":"HIP","designation":"HIP 52222"}],"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."}