{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T10:11:56.738Z","years_from_j2000":26.672,"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-85489","name":"HIP 85489","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":10.2,"mag_band":"V","abs_mag":3.442,"abs_mag_band":"V","distance_ly":732.9356765976663,"distance_method":"parallax","ra_deg":262.06545,"dec_deg":-45.83837,"epoch_ra_deg":262.561752,"epoch_dec_deg":-45.860704,"epoch_moved_arcsec":0.246,"pm_ra_mas_yr":-3.2,"pm_dec_mas_yr":-8.65,"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-85489","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17283-4550","age_years":1638772400,"companions":[{"measured":2015,"magnitude":11.26,"components":null,"discoverer_code":"DON 840","separation_arcsec":1.3,"position_angle_deg":12}],"mass_solar":1.753,"radius_solar":3.315,"spectral_type":"F8","color_index_bv":0.588,"luminosity_solar":3.65763193009452,"variable_mag_max":10.138,"variable_mag_min":10.258,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2014yCat....1.2023S, quality E)","surface_gravity_log_g":3.496,"surface_temperature_k":6311,"proper_motion_ra_mas_yr":-3.2,"proper_motion_dec_mas_yr":-8.65,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":14.808},"designations":[{"catalog":"HIP","designation":"HIP 85489"}],"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."}