{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T12:20:49.547Z","years_from_j2000":26.675,"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-15125","name":"HD 15125","class":"b9_blue_white_star","category":"star","object_type":"B9 blue-white star","mag":8.04,"mag_band":"V","abs_mag":1.072,"abs_mag_band":"V","distance_ly":807.3179216306137,"distance_method":"parallax","ra_deg":36.835335,"dec_deg":41.521783,"epoch_ra_deg":37.257844,"epoch_dec_deg":41.642453,"epoch_moved_arcsec":0.331,"pm_ra_mas_yr":11.06,"pm_dec_mas_yr":-5.65,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Andromeda","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-15125","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02273+4131","companions":[{"measured":2015,"magnitude":11.6,"components":null,"discoverer_code":"FOX 124","separation_arcsec":20.4,"position_angle_deg":102}],"mass_solar":2.564,"radius_solar":2.183,"spectral_type":"B9","color_index_bv":-0.004,"luminosity_solar":32.44890156605365,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":4.034,"surface_temperature_k":10707,"proper_motion_ra_mas_yr":11.06,"proper_motion_dec_mas_yr":-5.65,"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":49.3545},"designations":[{"catalog":"HD","designation":"HD 15125"},{"catalog":"HIP","designation":"HIP 11424"}],"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."}