{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T05:36:07.304Z","years_from_j2000":26.674,"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-207222","name":"HD 207222","class":"a0_white_star","category":"star","object_type":"A0 white star","mag":8.6,"mag_band":"V","abs_mag":1.923,"abs_mag_band":"V","distance_ly":705.9661318806466,"distance_method":"parallax","ra_deg":326.73441,"dec_deg":21.297436,"epoch_ra_deg":327.045896,"epoch_dec_deg":21.421336,"epoch_moved_arcsec":0.412,"pm_ra_mas_yr":11.25,"pm_dec_mas_yr":-10.58,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-207222","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"A0","color_index_bv":0.095,"luminosity_solar":14.818355175164307,"metallicity_fe_h":-1.15,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2007MNRAS.374..664C, quality D)","surface_gravity_log_g":3.5,"surface_temperature_k":8542,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":11.25,"proper_motion_dec_mas_yr":-10.58,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 207222"},{"catalog":"HIP","designation":"HIP 107547"}],"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."}