{"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":"2026-09-04T02:41:19.360Z","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-207180","name":"HD 207180","class":"k0iiicnii_orange_giant","category":"star","object_type":"K0IIICNII orange giant","mag":7.54,"mag_band":"V","abs_mag":0.712,"abs_mag_band":"V","distance_ly":756.7434613891,"distance_method":"parallax","ra_deg":328.34127,"dec_deg":-78.579441,"epoch_ra_deg":329.078299,"epoch_dec_deg":-78.452816,"epoch_moved_arcsec":0.821,"pm_ra_mas_yr":29.82,"pm_dec_mas_yr":7.59,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Octans","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-207180","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"21534-7835","age_years":454531000,"companions":[{"measured":2015,"magnitude":13.5,"components":null,"discoverer_code":"I   672","separation_arcsec":17.4,"position_angle_deg":295}],"mass_solar":2.804,"radius_solar":11.755,"spectral_type":"K0IIICNII","color_index_bv":1.139,"luminosity_solar":45.20640796485015,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality C)","surface_gravity_log_g":2.334,"surface_temperature_k":4569,"proper_motion_ra_mas_yr":29.82,"proper_motion_dec_mas_yr":7.59,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":53.3514},"designations":[{"catalog":"HD","designation":"HD 207180"},{"catalog":"HIP","designation":"HIP 108045"}],"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."}