{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-28T00:06:46.238Z","years_from_j2000":26.654,"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":"hip-118317","name":"HIP 118317","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":10.01,"mag_band":"V","abs_mag":2.374,"abs_mag_band":"V","distance_ly":1098.1695022414083,"distance_method":"parallax","ra_deg":359.96178,"dec_deg":-36.419494,"epoch_ra_deg":0.307461,"epoch_dec_deg":-36.270084,"epoch_moved_arcsec":0.85,"pm_ra_mas_yr":31.41,"pm_dec_mas_yr":-5.41,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sculptor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-118317","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"F8","color_index_bv":0.549,"luminosity_solar":9.781377043229856,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1955AnCap..18....0J, quality E)","proper_motion_ra_mas_yr":31.41,"proper_motion_dec_mas_yr":-5.41},"designations":[{"catalog":"HIP","designation":"HIP 118317"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}