TIC 274179241

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 ATO J304.8032+40.8448 (V*); catalogued variable star nearby: Gaia DR3 2068355098983258496 (YSO), 41" away; in the ATLAS variable-star catalogue (Heinze et al. 2018) as J304.8032+40.8448; SIMBAD lists ATO J304.8032+40.8448 also as ATO J304.8032+40.8448. The rare-find check confirms what is on record - still nice, but not a new discovery.

Eccentric eclipsing binary notable
The second eclipse comes at phase 0.181 instead of 0.5: the orbit is stretched (eccentricity at least 0.502). Eccentric binaries show how tides shape orbits, and their slowly turning orbits test General Relativity.

Checked, nothing found (7)

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

Checked 2026-10-12 07:36 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Notable, already known: Eccentric eclipsing binary (in SIMBAD as ATO J304.8032+40.8448 (V*); catalogued variable star nearby: Gaia DR3 2068355098983258496 (YSO), 41" away). NOTE: SIMBAD already lists this star (ATO J304.8032+40.8448) as type V*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 15 (flagged in 2 sector(s)). Detection score 574.9. 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: Eccentric eclipsing binary 2026-10-09 Gaia hints at a hidden companion star (RUWE 1.4) 2026-10-09 Found by the automatic search in TESS sector 14

The signal

Type	Eclipsing binary
Status	Notable, already known
Period (days)	2.07283
Period source	hunt.py on TESS QLP sector 15
Eclipse / dip depth	76.2%
Amplitude	9.1%
Data used	TESS sector 15 (QLP)

The star (Gaia & TESS)

Distance (pc)	1,018 (~3,321 light years)
Temperature (Gaia)	5,280 K
Size (Gaia)	2.91 x the Sun
Mass (Gaia)	1.42 x the Sun
Luminosity (Gaia)	5.96 x the Sun
Colour, Gaia BP-RP	1.70
RUWE (Gaia)	1.42 - hints at a hidden companion star
Gaia G mag	14.19
TESS mag	13.32

Names & neighbours

TIC ID	274179241
Gaia DR3 ID	2068355202062477440
SIMBAD name	ATO J304.8032+40.8448 [V*]
Nearest known variable	Gaia DR3 2068355098983258496 (YSO), 41" away
RA (deg)	304.803
Dec (deg)	40.8449
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)