{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T03:02:11.479Z","years_from_j2000":26.671,"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-180262","name":"HD 180262","class":"g8ii_iii_yellow_bright_giant","category":"star","object_type":"G8II-III yellow bright giant","mag":5.58,"mag_band":"V","abs_mag":-1.055,"abs_mag_band":"V","distance_ly":692.4763040982821,"distance_method":"parallax","ra_deg":288.833715,"dec_deg":15.083651,"epoch_ra_deg":289.139398,"epoch_dec_deg":15.130028,"epoch_moved_arcsec":0.299,"pm_ra_mas_yr":1.04,"pm_dec_mas_yr":-11.17,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aquila","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-180262","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19153+1505","companions":[{"measured":2018,"magnitude":7.64,"components":null,"discoverer_code":"STTA178","separation_arcsec":89.6,"position_angle_deg":267}],"mass_solar":4.001,"radius_solar":23.145,"spectral_type":"G8II-III","color_index_bv":1.067,"luminosity_solar":230.14418174085066,"metallicity_fe_h":0,"radial_velocity_km_s":-25,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":2.245,"surface_temperature_k":4910,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":1.04,"proper_motion_dec_mas_yr":-11.17,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":249.1318},"designations":[{"catalog":"HD","designation":"HD 180262"},{"catalog":"HIP","designation":"HIP 94624"},{"catalog":"HR","designation":"HR 7300"}],"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."}