TIC 159540747

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 2MASS J16343224+8229086 (SB*). The rare-find check confirms what is on record - still nice, but not a new discovery.

Microlensing (rogue planet?) significant
A one-off, symmetric brightening at BTJD 2931.43 that fits the gravitational-lens shape better than a flare (Einstein time 0.7 h). Events this short can be made by a free-floating (rogue) planet passing in front of the star. Very rare in TESS data; scattered light and asteroids can mimic it.
Lopsided transit hint
The start of the transit is deeper than the end: a dust tail (disintegrating planet), rings, a fast-spinning star, or a blend.

Checked, nothing found (10)

Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Dimming beside the transit · Trojan companions (L4/L5) · More planets in the system · Self-lensing binary · Type of star

Checked 2026-10-11 16:48 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: Microlensing (rogue planet?); Lopsided transit (in SIMBAD as 2MASS J16343224+8229086 (SB*)). NOTE: SIMBAD already lists this star (2MASS J16343224+8229086) as type SB*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 21 (flagged in 6 sector(s)). Detection score 151.6. 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: Microlensing (rogue planet?); Lopsided transit 2026-10-11 Found by the automatic search in TESS sector 21

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	4.35225
Period source	hunt.py on TESS QLP sector 21
Eclipse / dip depth	1.4%
Amplitude	0.2%
Data used	TESS sector 21 (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	~21.9 Earth radii (~1.96 Jupiter)

The star (Gaia & TESS)

Distance (pc)	453 (~1,476 light years)
Temperature (Gaia)	5,752 K
Size (Gaia)	1.67 x the Sun
Mass (Gaia)	1.08 x the Sun
Luminosity (Gaia)	2.75 x the Sun
Colour, Gaia BP-RP	0.91
RUWE (Gaia)	0.94 - fits a single star
Radial velocity (Gaia)	speed changes by 40 km/s - likely an orbiting pair
Gaia G mag	11.98
TESS mag	11.51

Names & neighbours

TIC ID	159540747
Gaia DR3 ID	1722807624053230848
SIMBAD name	2MASS J16343224+8229086 [SB*]
Nearest known variable	none within 5'
RA (deg)	248.634
Dec (deg)	82.4857
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

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