{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T05:32:35.802Z","years_from_j2000":26.68,"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-224411","name":"HD 224411","class":"a2iii_iv_m_white_giant","category":"star","object_type":"A2III/IV(m) white giant","mag":9.59,"mag_band":"V","abs_mag":1.939,"abs_mag_band":"V","distance_ly":1105.615000031926,"distance_method":"parallax","ra_deg":359.414925,"dec_deg":-52.19574,"epoch_ra_deg":359.763595,"epoch_dec_deg":-52.046043,"epoch_moved_arcsec":0.686,"pm_ra_mas_yr":12.89,"pm_dec_mas_yr":22.25,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Phoenix","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-224411","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"A2III/IV(m)","color_index_bv":0.204,"luminosity_solar":14.601584968117862,"variable_mag_max":9.53,"variable_mag_min":9.64,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality D)","proper_motion_ra_mas_yr":12.89,"proper_motion_dec_mas_yr":22.25},"designations":[{"catalog":"HD","designation":"HD 224411"},{"catalog":"HIP","designation":"HIP 118128"}],"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."}