TIC 328141469

Eclipsing binaryRare, already known

Rare & notable finds

Something genuinely unusual turned up. Treat it as a lead: every one of these has ordinary explanations too, listed with each. How these checks work →

Already known: the catalogued variable ASAS J180448-3634.3 (ED, 39" away) has the same period - its light leaks into TESS's big pixels; same period as the known variable ASAS J180448-3634.3. The rare-find check confirms what is on record - still nice, but not a new discovery.

Eclipse timing (third body?) significant
The eclipses drift early and late by 6.8 min, repeating every ~698 days: light taking longer or shorter to reach us as the pair is pulled around by a hidden third star (or planet), or a slowly turning eccentric orbit.
Eccentric eclipsing binary notable
The second eclipse comes at phase 0.190 instead of 0.5: the orbit is stretched (eccentricity at least 0.487). Eccentric binaries show how tides shape orbits, and their slowly turning orbits test General Relativity.
Transits of a giant star notable
Gaia places this star among the giants: planets transiting giants are rare, and a big star makes even a large planet's dip tiny.

Checked, nothing found (5)

Microlensing (rogue planet?) · Exocomet-shaped dip · Eclipses changing depth · Pulsating star in an eclipsing binary · Extra dips outside the eclipses

Checked 2026-10-12 01:04 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Rare, already known: Eclipse timing (third body?); Eccentric eclipsing binary; Transits of a giant star (the catalogued variable ASAS J180448-3634.3 (ED, 39" away) has the same period - its light leaks into TESS's big pixels; same period as the known variable ASAS J180448-3634.3). WARNING: same period as the known variable ASAS J180448-3634.3 39" away; the signal is probably its light leaking in. Found automatically by hunt.py in TESS sector 13 (flagged in 1 sector(s)). Detection score 865.0. Not in VSX, ASAS-SN or ZTF variable catalogues at the time of the search; not in Gaia DR3's variable lists. Unchecked by hand yet: verify the period, nearby stars and a wider catalogue search. Updates: 2026-10-12 Rare-find check: Eclipse timing (third body?); Eccentric eclipsing binary; Transits of a giant star 2026-10-09 Found by the automatic search in TESS sector 13

The signal

Type	Eclipsing binary
Status	Rare, already known
Period (days)	3.84667
Period source	hunt.py on TESS QLP sector 13
Eclipse / dip depth	73.6%
Amplitude	50.9%
Data used	TESS sector 13 (QLP)

The star (Gaia & TESS)

Distance (pc)	3,544 (~11,560 light years)
Colour, Gaia BP-RP	1.47
RUWE (Gaia)	0.88 - fits a single star
Gaia G mag	13.72
TESS mag	12.98

Names & neighbours

TIC ID	328141469
Gaia DR3 ID	4038676603181277184
SIMBAD name	not in SIMBAD
Nearest known variable	ASAS J180448-3634.3 (ED, P = 3.849 d), 39" away (same period!)
RA (deg)	271.19
Dec (deg)	-36.5772
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-09
Last update	2026-10-12

Where it sits among the stars

ESA Gaia colour and true brightness. Grey: every Star Log candidate. Orange: this star.

How to read this diagram →

Data files

Download everything (.zip)