{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T20:34:36.626Z","years_from_j2000":26.67,"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-9003","name":"HIP 9003","class":"ob_blue_star","category":"star","object_type":"OB- blue star","mag":10.92,"mag_band":"V","abs_mag":2.16,"abs_mag_band":"V","distance_ly":1842.6915580010843,"distance_method":"parallax","ra_deg":28.980375000000002,"dec_deg":62.299023,"epoch_ra_deg":29.459912,"epoch_dec_deg":62.430634,"epoch_moved_arcsec":0.113,"pm_ra_mas_yr":-1.29,"pm_dec_mas_yr":4.03,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cassiopeia","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-9003","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"OB-","color_index_bv":0.462,"luminosity_solar":11.912420080273744,"variable_mag_max":10.83,"variable_mag_min":11.01,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1959LS....C01....0H, quality E)","proper_motion_ra_mas_yr":-1.29,"proper_motion_dec_mas_yr":4.03},"designations":[{"catalog":"HIP","designation":"HIP 9003"}],"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."}