{"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":"2026-09-02T14:19:44.478Z","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-211507","name":"HD 211507","class":"k2_iii_orange_giant","category":"star","object_type":"K2(III) orange giant","mag":9.98,"mag_band":"V","abs_mag":5.673,"abs_mag_band":"V","distance_ly":237.032190567377,"distance_method":"parallax","ra_deg":334.583685,"dec_deg":-38.759909,"epoch_ra_deg":334.980972,"epoch_dec_deg":-38.626299,"epoch_moved_arcsec":2.838,"pm_ra_mas_yr":62.55,"pm_dec_mas_yr":-86.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Grus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-211507","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"22183-3846","age_years":10977027000,"companions":[{"measured":2016,"magnitude":14.54,"components":null,"discoverer_code":"UC 4712","separation_arcsec":80.7,"position_angle_deg":8}],"mass_solar":0.802,"radius_solar":0.828,"spectral_type":"K2(III)","color_index_bv":0.965,"luminosity_solar":0.4685975353086258,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality D)","surface_gravity_log_g":4.523,"surface_temperature_k":4945,"proper_motion_ra_mas_yr":62.55,"proper_motion_dec_mas_yr":-86.08,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3695},"designations":[{"catalog":"HD","designation":"HD 211507"},{"catalog":"HIP","designation":"HIP 110115"}],"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."}