{"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":"2026-09-03T06:54:58.504Z","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-23675","name":"HD 23675","class":"b0_5iii_blue_white_giant","category":"star","object_type":"B0.5III blue-white giant","mag":6.73,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":57.364875,"dec_deg":52.655397,"epoch_ra_deg":57.872972,"epoch_dec_deg":52.737363,"epoch_moved_arcsec":0.126,"pm_ra_mas_yr":-1.91,"pm_dec_mas_yr":-4.32,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Perseus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-23675","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03495+5239","companions":[{"measured":2021,"magnitude":9.9,"components":"AB","discoverer_code":"STF 446","separation_arcsec":8.8,"position_angle_deg":255},{"measured":2015,"magnitude":12,"components":"AC","discoverer_code":"ES   12","separation_arcsec":12,"position_angle_deg":39},{"measured":2015,"magnitude":13.6,"components":"AG","discoverer_code":"FYM 162","separation_arcsec":57.1,"position_angle_deg":316},{"measured":2015,"magnitude":13.19,"components":"AF","discoverer_code":"FYM 162","separation_arcsec":58.1,"position_angle_deg":230},{"measured":2015,"magnitude":11.83,"components":"AD","discoverer_code":"ES   12","separation_arcsec":65.8,"position_angle_deg":337}],"spectral_type":"B0.5III","color_index_bv":0.394,"radial_velocity_km_s":2,"spectral_type_source":"SIMBAD (quality C)","proper_motion_ra_mas_yr":-1.91,"proper_motion_dec_mas_yr":-4.32},"designations":[{"catalog":"HD","designation":"HD 23675"},{"catalog":"HIP","designation":"HIP 17877"}],"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."}