{"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":"2026-09-03T13:34:42.374Z","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-90211","name":"HIP 90211","class":"k2_orange_star","category":"star","object_type":"K2 orange star","mag":9.61,"mag_band":"V","abs_mag":0.838,"abs_mag_band":"V","distance_ly":1853.1611777257915,"distance_method":"parallax","ra_deg":276.10836,"dec_deg":-20.872274,"epoch_ra_deg":276.509139,"epoch_dec_deg":-20.858076,"epoch_moved_arcsec":0.191,"pm_ra_mas_yr":-0.78,"pm_dec_mas_yr":7.12,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-90211","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":455083820,"mass_solar":2.801,"radius_solar":9.622,"spectral_type":"K2","color_index_bv":1.38,"luminosity_solar":40.25316189742118,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1995A&AS..110..367N, quality E)","surface_gravity_log_g":2.745,"surface_temperature_k":5126,"proper_motion_ra_mas_yr":-0.78,"proper_motion_dec_mas_yr":7.12,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":61.2386},"designations":[{"catalog":"HIP","designation":"HIP 90211"}],"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."}