{"_facts":{"companion":"","deep":"","dossier":"","gaia_eb":"","impression":"","period":"","planet":"","rare":"Eccentric eclipsing binary","toi":""},"amplitude":"4.8%","bp_rp":"0.45","cover":"TIC399581377_s0018.png","data_used":"TESS sector 18 (QLP)","date":"2026-10-10","dec":"42.245","depth":"5.0%","found_by":"hunt.py (automatic)","gaia_dr3":"337045913583323008","gaia_gmag":"11.95","history":[{"date":"2026-10-10","text":"Found by the automatic search in TESS sector 18"},{"date":"2026-10-12","text":"Rare-find check: Eccentric eclipsing binary"}],"last_update":"2026-10-12","nearest_variable":"NSV 886 (?), 85\" away","nearest_variable_id":"NSV 886","notes":"Notable, already known: Eccentric eclipsing binary (in SIMBAD as Cl* NGC 1039      W     536 (Pe*); catalogued variable star nearby: NSV 886, 85\" away).\n\nFound automatically by hunt.py in TESS sector 18 (flagged in 1 sector(s)). Detection score 388.3.\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:\n2026-10-12  Rare-find check: Eccentric eclipsing binary\n2026-10-10  Found by the automatic search in TESS sector 18","period_days":"2.14586","period_source":"hunt.py on TESS QLP sector 18","ra":"40.0874","rare":"Eccentric eclipsing binary","rare_checked":"2026-10-12 17:41","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","Type of star"],"rare_device":"GPU: NVIDIA GeForce RTX 4070 (CUDA, CuPy)","rare_flags":[{"id":"eccentric_eb","level":"notable","name":"Eccentric eclipsing binary","text":"The second eclipse comes at phase 0.172 instead of 0.5: the orbit is stretched (eccentricity at least 0.516). Eccentric binaries show how tides shape orbits, and their slowly turning orbits test General Relativity."}],"rare_known":true,"rare_known_why":["in SIMBAD as Cl* NGC 1039      W     536 (Pe*)","catalogued variable star nearby: NSV 886, 85\" away","in the ATLAS variable-star catalogue (Heinze et al. 2018) as J040.0874+42.2449"],"rare_level":"notable","rare_n":10,"score":"388.3","sector":18,"simbad_id":"Cl* NGC 1039      W     536","simbad_name":"Cl* NGC 1039      W     536 [Pe*]","status":"Notable, already known","tic":"399581377","title":"TIC 399581377","tmag":"11.56","type":"Eclipsing binary"}