{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T00:19:58.068Z","years_from_j2000":26.682,"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-23753","name":"HD 23753","class":"b8v_blue_white_main_sequence_star","category":"star","object_type":"B8V blue-white main-sequence star","mag":5.44,"mag_band":"V","abs_mag":0.074,"abs_mag_band":"V","distance_ly":385.98389439408106,"distance_method":"parallax","ra_deg":57.08673,"dec_deg":23.42125,"epoch_ra_deg":57.485199,"epoch_dec_deg":23.503669,"epoch_moved_arcsec":1.349,"pm_ra_mas_yr":19.14,"pm_dec_mas_yr":-46.8,"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-23753","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03483+2325","companions":[{"measured":1974,"magnitude":7.7,"components":"Aa,Ab","discoverer_code":"OCC 299","separation_arcsec":0.1,"position_angle_deg":-1},{"measured":2011,"magnitude":14.09,"components":"AB","discoverer_code":"HL   25","separation_arcsec":176.6,"position_angle_deg":298}],"spectral_type":"B8V","color_index_bv":-0.067,"luminosity_solar":81.35795056053963,"radial_velocity_km_s":4,"spectral_type_source":"SIMBAD (quality C)","surface_temperature_k":12247,"proper_motion_ra_mas_yr":19.14,"proper_motion_dec_mas_yr":-46.8,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 23753"},{"catalog":"HIP","designation":"HIP 17776"},{"catalog":"HR","designation":"HR 1172"}],"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."}