{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T16:42:50.750Z","years_from_j2000":26.675,"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-182296","name":"HD 182296","class":"g1ib_yellow_supergiant","category":"star","object_type":"G1Ib yellow supergiant","mag":7.05,"mag_band":"V","abs_mag":-2.364,"abs_mag_band":"V","distance_ly":2489.7434110619997,"distance_method":"parallax","ra_deg":290.91134999999997,"dec_deg":8.660006,"epoch_ra_deg":291.23401,"epoch_dec_deg":8.71158,"epoch_moved_arcsec":0.177,"pm_ra_mas_yr":-1.22,"pm_dec_mas_yr":-6.54,"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-182296","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"G1Ib","color_index_bv":1.289,"luminosity_solar":768.4223711000267,"metallicity_fe_h":0.3,"radial_velocity_km_s":-14,"spectral_type_source":"SIMBAD (2007A&A...469..713M, quality D)","surface_gravity_log_g":1.64,"surface_temperature_k":5111,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-1.22,"proper_motion_dec_mas_yr":-6.54,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 182296"},{"catalog":"HIP","designation":"HIP 95325"}],"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."}