TIC 272357134

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: on NASA's TESS list as CTOI 272357134.01 (PC); in SIMBAD as HD 66631 (SB*); catalogued variable star nearby: Gaia DR3 5215043436486459904 (E, P = 0.38371 d), 125" away; in the TESS eclipsing-binary catalogue (Prsa et al. 2022) as TIC 0272357134. The rare-find check confirms what is on record - still nice, but not a new discovery.

Dimming beside the transit hint
On average the star is 94 ppm dimmer just before and after the transit (14.1 sigma): what a moon (or ring/dust) travelling with the planet would cause. Instrument trends can do this too.
Another planet in the system significant
Another set of dips every 46.1663 days (467 ppm, 6 seen, SNR 14.4).

Checked, nothing found (10)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Lopsided transit · Trojan companions (L4/L5) · Self-lensing binary · Type of star

Checked 2026-10-11 16:24 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Already known to NASA: CTOI 272357134.01 (PC). Rare, already known: Dimming beside the transit; Another planet in the system (on NASA's TESS list as CTOI 272357134.01 (PC); in SIMBAD as HD 66631 (SB*)). Already on NASA's TESS list as CTOI 272357134.01 (PC). NOTE: SIMBAD already lists this star (HD 66631) as type SB*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 13 (flagged in 3 sector(s)). Detection score 855.4. 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 Rare-find check: Another planet in the system; Dimming beside the transit 2026-10-09 Found on NASA's list of TESS planet candidates: CTOI 272357134.01 (PC) 2026-10-09 Planet check: Already known to NASA: CTOI 272357134.01 (PC) 2026-10-09 Found by the automatic search in TESS sector 13

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	4.19742
Period source	hunt.py on TESS QLP sector 13
Eclipse / dip depth	1.4%
Amplitude	0.4%
Data used	TESS sector 13 (QLP)

Planet check

Verdict	Already known to NASA: CTOI 272357134.01 (PC) ExoFOP check plot all test results light curve data
Size if it's a planet	~32.2 Earth radii (~2.87 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	182 (~593 light years)
Temperature (Gaia)	6,203 K
Size (Gaia)	2.28 x the Sun
Mass (Gaia)	1.48 x the Sun
Luminosity (Gaia)	6.95 x the Sun
Colour, Gaia BP-RP	0.69
RUWE (Gaia)	1.09 - fits a single star
Radial velocity (Gaia)	speed changes by 43 km/s - likely an orbiting pair
Gaia G mag	8.91
TESS mag	8.536

Names & neighbours

TIC ID	272357134
Gaia DR3 ID	5215043092888960384
SIMBAD name	HD 66631 [SB*]
Nearest known variable	Gaia DR3 5215043436486459904 (E, P = 0.38371 d), 125" away
RA (deg)	119.48
Dec (deg)	-73.4731
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

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