{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T02:20:41.301Z","years_from_j2000":26.671,"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":"hat-p-46","name":"HAT-P-46","class":"star","category":"star","object_type":null,"mag":11.997,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":948.2540063185511,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":270.4441831,"dec_deg":-2.97098,"epoch_ra_deg":270.795976,"epoch_dec_deg":-2.971662,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Serpens","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hat-p-46","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18018-0258","companions":[{"measured":2015,"magnitude":19.6,"components":"AC","discoverer_code":"HTP  46","separation_arcsec":8.4,"position_angle_deg":136},{"measured":2015,"magnitude":19.4,"components":"AB","discoverer_code":"HTP  46","separation_arcsec":8.8,"position_angle_deg":172},{"measured":2014,"magnitude":21.2,"components":"AD","discoverer_code":"HTP  46","separation_arcsec":10.9,"position_angle_deg":109},{"measured":2015,"magnitude":19.7,"components":"AE","discoverer_code":"HTP  46","separation_arcsec":12.9,"position_angle_deg":259},{"measured":2014,"magnitude":20.4,"components":"AF","discoverer_code":"HTP  46","separation_arcsec":13.9,"position_angle_deg":354},{"measured":2014,"magnitude":21.3,"components":"AG","discoverer_code":"HTP  46","separation_arcsec":14,"position_angle_deg":255},{"measured":2015,"magnitude":20.1,"components":"AH","discoverer_code":"HTP  46","separation_arcsec":14.3,"position_angle_deg":312},{"measured":2014,"magnitude":21.4,"components":"AI","discoverer_code":"HTP  46","separation_arcsec":14.5,"position_angle_deg":61},{"measured":2014,"magnitude":20.6,"components":"AJ","discoverer_code":"HTP  46","separation_arcsec":16.8,"position_angle_deg":156},{"measured":2015,"magnitude":20.3,"components":"AK","discoverer_code":"HTP  46","separation_arcsec":17.5,"position_angle_deg":115},{"measured":2014,"magnitude":20,"components":"AL","discoverer_code":"HTP  46","separation_arcsec":18.7,"position_angle_deg":197},{"measured":2014,"magnitude":20.8,"components":"AM","discoverer_code":"HTP  46","separation_arcsec":19.4,"position_angle_deg":135},{"measured":2015,"magnitude":20.4,"components":"AN","discoverer_code":"HTP  46","separation_arcsec":19.8,"position_angle_deg":74},{"measured":2015,"magnitude":18.6,"components":"AO","discoverer_code":"HTP  46","separation_arcsec":21.3,"position_angle_deg":251},{"measured":2015,"magnitude":20.3,"components":"AP","discoverer_code":"HTP  46","separation_arcsec":21.4,"position_angle_deg":52},{"measured":2015,"magnitude":19.3,"components":"AQ","discoverer_code":"HTP  46","separation_arcsec":25.1,"position_angle_deg":54}],"mass_solar":1.284,"radius_solar":1.396,"stars_in_system":1,"planets_in_system":1,"surface_temperature_k":6120,"stellar_parameters_method":"NASA Exoplanet Archive composite parameters"},"designations":[],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"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."}