TIC 270238763

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 TYC 4288-1592-1 (*); catalogued variable star nearby: ZTF J232600.07+642229.3 (HADS, P = 0.10354 d), 50" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Pulsating star in an eclipsing binary notable
Besides the eclipses, one star pulsates 9.7 times a day (336 ppm): a delta Scuti-type pulsator in an eclipsing binary. The eclipses give its mass and size, the pulsations its inside - a few hundred such systems are known.

Checked, nothing found (7)

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

Checked 2026-10-12 02:51 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Notable, already known: Pulsating star in an eclipsing binary (in SIMBAD as TYC 4288-1592-1 (*); catalogued variable star nearby: ZTF J232600.07+642229.3 (HADS, P = 0.10354 d), 50" away). Found automatically by hunt.py in TESS sector 18 (flagged in 2 sector(s)). Detection score 730.7. 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: Pulsating star in an eclipsing binary 2026-10-10 Found by the automatic search in TESS sector 18

The signal

Type	Eclipsing binary
Status	Notable, already known
Period (days)	2.14474
Period source	hunt.py on TESS QLP sector 18
Eclipse / dip depth	10.5%
Amplitude	6.0%
Data used	TESS sector 18 (QLP)

The star (Gaia & TESS)

Distance (pc)	804 (~2,621 light years)
Colour, Gaia BP-RP	0.67
RUWE (Gaia)	1.29 - fits a single star
Radial velocity (Gaia)	speed changes by 117 km/s - likely an orbiting pair
Gaia G mag	11.93
TESS mag	11.59

Names & neighbours

TIC ID	270238763
Gaia DR3 ID	2209124232664176640
SIMBAD name	TYC 4288-1592-1 [*]
Nearest known variable	ZTF J232600.07+642229.3 (HADS, P = 0.10354 d), 50" away
RA (deg)	351.474
Dec (deg)	64.3827
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.

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Data files

Download everything (.zip)