{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T13:49:58.624Z","years_from_j2000":26.67,"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-217700","name":"HD 217700","class":"f3v_yellow_white_main_sequence_star","category":"star","object_type":"F3V yellow-white main-sequence star","mag":8.68,"mag_band":"V","abs_mag":1.77,"abs_mag_band":"V","distance_ly":785.9191278449958,"distance_method":"parallax","ra_deg":345.657465,"dec_deg":-5.729024,"epoch_ra_deg":346.005396,"epoch_dec_deg":-5.584562,"epoch_moved_arcsec":0.439,"pm_ra_mas_yr":9.62,"pm_dec_mas_yr":13.38,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aquarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-217700","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":1981562900,"mass_solar":1.614,"radius_solar":2.65,"spectral_type":"F3V","color_index_bv":0.459,"luminosity_solar":17.060823890031234,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality C)","surface_gravity_log_g":3.827,"surface_temperature_k":6317,"proper_motion_ra_mas_yr":9.62,"proper_motion_dec_mas_yr":13.38,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":9.9688},"designations":[{"catalog":"HD","designation":"HD 217700"},{"catalog":"HIP","designation":"HIP 113791"}],"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."}