{"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":"2026-09-03T10:44:08.370Z","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":"hd-286948","name":"HD 286948","class":"a5_white_star","category":"star","object_type":"A5 white star","mag":9.44,"mag_band":"V","abs_mag":2.592,"abs_mag_band":"V","distance_ly":763.8321441023958,"distance_method":"parallax","ra_deg":69.76659000000001,"dec_deg":10.398931,"epoch_ra_deg":70.136341,"epoch_dec_deg":10.452293,"epoch_moved_arcsec":0.156,"pm_ra_mas_yr":1.34,"pm_dec_mas_yr":-5.71,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-286948","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04391+1024","age_years":661036000,"companions":[{"measured":2016,"magnitude":11.42,"components":null,"discoverer_code":"A  2036","separation_arcsec":2.8,"position_angle_deg":292}],"mass_solar":1.647,"radius_solar":1.67,"spectral_type":"A5","color_index_bv":0.5,"luminosity_solar":8.002026771193325,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1995A&AS..110..367N, quality E)","surface_gravity_log_g":4.148,"surface_temperature_k":7533,"proper_motion_ra_mas_yr":1.34,"proper_motion_dec_mas_yr":-5.71,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":8.5897},"designations":[{"catalog":"HD","designation":"HD 286948"},{"catalog":"HIP","designation":"HIP 21663"}],"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."}