{"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":"2026-09-06T11:46:26.691Z","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-206874","name":"HD 206874","class":"f0ivp_yellow_white_subgiant","category":"star","object_type":"F0IVp yellow-white subgiant","mag":6.89,"mag_band":"V","abs_mag":2.212,"abs_mag_band":"V","distance_ly":281.1693023818953,"distance_method":"parallax","ra_deg":326.07993000000005,"dec_deg":28.781604,"epoch_ra_deg":326.377305,"epoch_dec_deg":28.904256,"epoch_moved_arcsec":1.424,"pm_ra_mas_yr":0.48,"pm_dec_mas_yr":-53.38,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-206874","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"21441+2845","age_years":1624821100,"companions":[{"measured":2015,"magnitude":13.13,"components":"DE","discoverer_code":"ES  521","separation_arcsec":17.5,"position_angle_deg":286},{"measured":2012,"magnitude":13.77,"components":"DG","discoverer_code":"FYM  25","separation_arcsec":89.6,"position_angle_deg":164}],"mass_solar":1.605,"radius_solar":2.227,"spectral_type":"F0IVp","color_index_bv":0.411,"luminosity_solar":11.355336278419369,"radial_velocity_km_s":3.1,"spectral_type_source":"SIMBAD (2009ApJS..180..117A, quality C)","surface_gravity_log_g":3.917,"surface_temperature_k":6795,"proper_motion_ra_mas_yr":0.48,"proper_motion_dec_mas_yr":-53.38,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":9.3428},"designations":[{"catalog":"HD","designation":"HD 206874"},{"catalog":"HIP","designation":"HIP 107326"}],"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."}