TIC 264618290

Transit candidateRare, 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: in SIMBAD as TYC 3690-2042-1 (SB*); catalogued variable star nearby: ZTF J021811.22+551819.4 (BY, P = 5.5623 d), 139" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Transit timing (TTV) significant
The transits arrive early or late by 10.1 min (typical error 1.1 min) repeating every ~4263.0 orbits: something is tugging on the planet - another planet, or a moon.
Lopsided transit hint
The end of the transit is deeper than the start: a dust tail (disintegrating planet), rings, a fast-spinning star, or a blend.

Checked, nothing found (6)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit duration (TDV) · Changing transit depth · Type of star

Checked 2026-10-11 16:23 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Probably noise or an instrument effect. Rare, already known: Transit timing (TTV); Lopsided transit (in SIMBAD as TYC 3690-2042-1 (SB*); catalogued variable star nearby: ZTF J021811.22+551819.4 (BY, P = 5.5623 d), 139" away). NOTE: SIMBAD already lists this star (TYC 3690-2042-1) as type SB*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 18 (flagged in 1 sector(s)). Detection score 482.2. 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: 2026-10-11 Planet check: Probably noise or an instrument effect 2026-10-11 Rare-find check: Transit timing (TTV); Lopsided transit 2026-10-10 Found by the automatic search in TESS sector 18

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	1.29823
Period source	hunt.py on TESS QLP sector 18
Eclipse / dip depth	4.1%
Amplitude	4.2%
Data used	TESS sector 18 (QLP)

Planet check

Verdict	Probably noise or an instrument effect ExoFOP check plot all test results light curve data
Size if it's a planet	~61.7 Earth radii (~5.5 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	769 (~2,509 light years)
Temperature (Gaia)	7,870 K
Size (Gaia)	2.75 x the Sun
Mass (Gaia)	2.05 x the Sun
Luminosity (Gaia)	26.36 x the Sun
Colour, Gaia BP-RP	0.44
RUWE (Gaia)	1.13 - fits a single star
Gaia G mag	10.92
TESS mag	10.7

Names & neighbours

TIC ID	264618290
Gaia DR3 ID	456695765357097472
SIMBAD name	TYC 3690-2042-1 [SB*]
Nearest known variable	ZTF J021811.22+551819.4 (BY, P = 5.5623 d), 139" away
RA (deg)	34.5316
Dec (deg)	55.2677
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-10
Last update	2026-10-11

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)