{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T17:08:59.011Z","years_from_j2000":26.686,"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-88363","name":"HIP 88363","class":"f0_yellow_white_star","category":"star","object_type":"F0 yellow-white star","mag":9.97,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":270.657015,"dec_deg":-50.216183,"epoch_ra_deg":271.180999,"epoch_dec_deg":-50.216189,"epoch_moved_arcsec":0.322,"pm_ra_mas_yr":0.25,"pm_dec_mas_yr":-12.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ara","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-88363","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18026-5013","age_years":1056552000,"companions":[{"measured":2015,"magnitude":12.18,"components":null,"discoverer_code":"HDS2540","separation_arcsec":16.8,"position_angle_deg":14}],"mass_solar":2.004,"radius_solar":3.871,"spectral_type":"F0","color_index_bv":0.451,"variable_mag_max":9.91,"variable_mag_min":10.03,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2014yCat....1.2023S, quality E)","surface_gravity_log_g":3.535,"surface_temperature_k":6968,"proper_motion_ra_mas_yr":0.25,"proper_motion_dec_mas_yr":-12.08,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":25.1133},"designations":[{"catalog":"HIP","designation":"HIP 88363"}],"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."}