{"_facts":{"companion":"1.5","deep":"","dossier":"","gaia_eb":"","impression":"","period":"","planet":"","rare":"Transits of a giant star","toi":""},"amplitude":"46.2%","bp_rp":"2.05","cover":"TIC422540997_s0018.png","data_used":"TESS sector 18 (QLP)","date":"2026-10-10","dec":"61.1381","depth":"56.4%","distance_pc":"3,712 (~12,109 light years)","found_by":"hunt.py (automatic)","gaia_dr3":"510650381482684672","gaia_gmag":"13.92","gaia_lum":"123.18 x the Sun","gaia_mass":"3.10 x the Sun","gaia_radius":"15.19 x the Sun","gaia_teff":"5,139 K","history":[{"date":"2026-10-10","text":"Found by the automatic search in TESS sector 18"},{"date":"2026-10-10","text":"Gaia hints at a hidden companion star (RUWE 1.5)"},{"date":"2026-10-11","text":"Rare-find check: Transits of a giant star"}],"hr":[2.047,1.074],"last_update":"2026-10-11","nearest_variable":"BU Cas (EA/DM, P = 2.2552 d), 47\" away (same period!)","nearest_variable_id":"BU Cas","notes":"Notable, already known: Transits of a giant star (the catalogued variable BU Cas (EA/DM, 47\" away) has the same period - its light leaks into TESS's big pixels; same period as the known variable BU Cas).\n\nWARNING: same period as the known variable BU Cas 47\" away; the signal is probably its light leaking in.\nFound automatically by hunt.py in TESS sector 18 (flagged in 1 sector(s)). Detection score 1542.9.\nNot in VSX, ASAS-SN or ZTF variable catalogues at the time of the search; not in Gaia DR3's variable lists.\nUnchecked by hand yet: verify the period, nearby stars and a wider catalogue search.\n\nUpdates:\n2026-10-11  Rare-find check: Transits of a giant star\n2026-10-10  Gaia hints at a hidden companion star (RUWE 1.5)\n2026-10-10  Found by the automatic search in TESS sector 18","period_days":"4.52458","period_source":"hunt.py on TESS QLP sector 18","ra":"22.1946","rare":"Transits of a giant star","rare_checked":"2026-10-11 18:24","rare_clear":["Microlensing (rogue planet?)","Exocomet-shaped dip","Eclipse timing (third body?)","Eclipses changing depth","Pulsating star in an eclipsing binary","Extra dips outside the eclipses"],"rare_device":"GPU: NVIDIA GeForce RTX 4070 (CUDA, CuPy)","rare_flags":[{"id":"giant_host","level":"notable","name":"Transits of a giant star","text":"Gaia places this star among the giants: planets transiting giants are rare, and a big star makes even a large planet's dip tiny."}],"rare_known":true,"rare_known_why":["the catalogued variable BU Cas (EA/DM, 47\" away) has the same period - its light leaks into TESS's big pixels","same period as the known variable BU Cas"],"rare_level":"notable","rare_n":9,"ruwe":"1.53 - hints at a hidden companion star","score":"1542.9","sector":18,"simbad_name":"not in SIMBAD","status":"Notable, already known","tic":"422540997","title":"TIC 422540997","tmag":"12.92","type":"Eclipsing binary"}