TIC 251377943

Eclipsing binaryNotable, already known

Rare & notable finds

A notable find: not unheard of, but the kind of system astronomers are glad to have more of. How these checks work →

Already known: in SIMBAD as UCAC4 746-026352 (*); the catalogued variable ZTF J025759.03+590704.2 (EA, 34" away) has the same period - its light leaks into TESS's big pixels; in the ATLAS variable-star catalogue (Heinze et al. 2018) as J044.4777+59.1177; same period as the known variable ZTF J025759.03+590704.2. The rare-find check confirms what is on record - still nice, but not a new discovery.

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 (6)

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

Checked 2026-10-12 18:07 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Notable, already known: Transits of a giant star (in SIMBAD as UCAC4 746-026352 (*); the catalogued variable ZTF J025759.03+590704.2 (EA, 34" away) has the same period - its light leaks into TESS's big pixels). WARNING: same period as the known variable ZTF J025759.03+590704.2 34" away; the signal is probably its light leaking in. Found automatically by hunt.py in TESS sector 18 (flagged in 1 sector(s)). Detection score 387.5. 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: Transits of a giant star 2026-10-10 Found by the automatic search in TESS sector 18

The signal

Type	Eclipsing binary
Status	Notable, already known
Period (days)	2.10404
Period source	hunt.py on TESS QLP sector 18
Eclipse / dip depth	5.5%
Amplitude	7.0%
Data used	TESS sector 18 (QLP)

The star (Gaia & TESS)

Distance (pc)	5,515 (~17,989 light years)
Colour, Gaia BP-RP	3.29
RUWE (Gaia)	1.15 - fits a single star
Gaia G mag	13.90
TESS mag	12.36

Names & neighbours

TIC ID	251377943
Gaia DR3 ID	461402705915481472
SIMBAD name	UCAC4 746-026352 [*]
Nearest known variable	ZTF J025759.03+590704.2 (EA, P = 2.1025 d), 34" away (same period!)
RA (deg)	44.4777
Dec (deg)	59.1177
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-10
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)