TIC 103742950

Transit candidateRare, already known

Rare & notable finds

Something unusual, worth a look - less certain than a significant find. How these checks work →

Already known: in SIMBAD as TYC 4387-1598-1 (*). The rare-find check confirms what is on record - still nice, but not a new discovery.

Microlensing (rogue planet?) hint
A one-off, symmetric brightening at BTJD 3327.44 that fits the gravitational-lens shape better than a flare (Einstein time 71.0 h). This length points to a star or brown dwarf as the lens. Very rare in TESS data; scattered light and asteroids can mimic it.
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 (7)

Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Dimming beside the transit · Type of star

Checked 2026-10-11 16:35 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 TYC 4387-1598-1 (*)). Found automatically by hunt.py in TESS sector 20 (flagged in 3 sector(s)). Detection score 204.0. 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 2026-10-10 Found by the automatic search in TESS sector 14

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	1.05922
Period source	hunt.py on TESS QLP sector 20
Eclipse / dip depth	0.9%
Amplitude	0.6%
Data used	TESS sector 20 (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	~21.5 Earth radii (~1.92 Jupiter)

The star (Gaia & TESS)

Distance (pc)	378 (~1,234 light years)
Temperature (Gaia)	6,675 K
Size (Gaia)	2.21 x the Sun
Mass (Gaia)	1.58 x the Sun
Luminosity (Gaia)	8.76 x the Sun
Colour, Gaia BP-RP	0.65
RUWE (Gaia)	0.94 - fits a single star
Gaia G mag	10.41
TESS mag	10.06

Names & neighbours

TIC ID	103742950
Gaia DR3 ID	1076602791911065344
SIMBAD name	TYC 4387-1598-1 [*]
Nearest known variable	none within 5'
RA (deg)	156.737
Dec (deg)	71.0641
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)