{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T06:09:07.673Z","years_from_j2000":26.669,"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-45563","name":"HD 45563","class":"b9iv_blue_white_subgiant","category":"star","object_type":"B9IV blue-white subgiant","mag":6.48,"mag_band":"V","abs_mag":0.438,"abs_mag_band":"V","distance_ly":526.9085636087984,"distance_method":"parallax","ra_deg":97.06986,"dec_deg":1.912679,"epoch_ra_deg":97.418753,"epoch_dec_deg":1.896007,"epoch_moved_arcsec":0.445,"pm_ra_mas_yr":-6.72,"pm_dec_mas_yr":-15.28,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Monoceros","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-45563","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06283+0155","companions":[{"measured":1988,"magnitude":null,"components":null,"discoverer_code":"CHR 166","separation_arcsec":0.3,"position_angle_deg":84}],"spectral_type":"B9IV","color_index_bv":-0.064,"luminosity_solar":58.1835211048072,"radial_velocity_km_s":42,"spectral_type_source":"SIMBAD (1994AJ....107.1556G, quality C)","surface_temperature_k":10568,"proper_motion_ra_mas_yr":-6.72,"proper_motion_dec_mas_yr":-15.28,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 45563"},{"catalog":"HIP","designation":"HIP 30798"},{"catalog":"HR","designation":"HR 2347"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}