{"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":"2026-09-03T14:58:16.174Z","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-2460","name":"HIP 2460","class":"b3_blue_white_star","category":"star","object_type":"B3 blue-white star","mag":10.4,"mag_band":"V","abs_mag":3.194,"abs_mag_band":"V","distance_ly":900.9844886524413,"distance_method":"parallax","ra_deg":7.823580000000001,"dec_deg":63.342483,"epoch_ra_deg":8.204771,"epoch_dec_deg":63.490787,"epoch_moved_arcsec":0.179,"pm_ra_mas_yr":1.58,"pm_dec_mas_yr":-6.54,"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-2460","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00313+6321","companions":[{"measured":2020,"magnitude":11.73,"components":"AB","discoverer_code":"BU  107","separation_arcsec":5.8,"position_angle_deg":354},{"measured":2015,"magnitude":12.2,"components":"AG","discoverer_code":"LV   13","separation_arcsec":21.1,"position_angle_deg":265},{"measured":2015,"magnitude":12.93,"components":"AH","discoverer_code":"BU  107","separation_arcsec":46,"position_angle_deg":93},{"measured":2015,"magnitude":9.58,"components":"AC","discoverer_code":"BU  107","separation_arcsec":46.8,"position_angle_deg":337},{"measured":2015,"magnitude":9.93,"components":"AD","discoverer_code":"BU  107","separation_arcsec":51.7,"position_angle_deg":145},{"measured":2015,"magnitude":10.16,"components":"AE","discoverer_code":"BU  107","separation_arcsec":111.5,"position_angle_deg":171},{"measured":2015,"magnitude":11.31,"components":"AF","discoverer_code":"BU  107","separation_arcsec":154,"position_angle_deg":114}],"spectral_type":"B3","luminosity_solar":4.5962114466600115,"variable_mag_max":10.341,"variable_mag_min":10.481,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","proper_motion_ra_mas_yr":1.58,"proper_motion_dec_mas_yr":-6.54},"designations":[{"catalog":"HIP","designation":"HIP 2460"}],"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."}