TIC 139079180

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 BD+45 3515 (*); catalogued variable star nearby: Gaia DR3 1972336874535570560 (ROT), 53" away. 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 516 ppm dimmer just before and after the transit (29.0 sigma): what a moon (or ring/dust) travelling with the planet would cause. Instrument trends can do this too.

Checked, nothing found (9)

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

Checked 2026-10-11 16:30 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: Dimming beside the transit (in SIMBAD as BD+45 3515 (*); catalogued variable star nearby: Gaia DR3 1972336874535570560 (ROT), 53" away). Found automatically by hunt.py in TESS sector 16 (flagged in 2 sector(s)). Detection score 244.4. 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 Planet check: Probably noise or an instrument effect 2026-10-11 Rare-find check: Dimming beside the transit 2026-10-10 Gaia hints at a hidden companion star (RUWE 7.6) 2026-10-10 Found by the automatic search in TESS sector 16

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	3.39629
Period source	hunt.py on TESS QLP sector 16
Eclipse / dip depth	1.1%
Amplitude	0.1%
Data used	TESS sector 16 (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	~76.5 Earth radii (~6.83 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	1,001 (~3,266 light years)
Temperature (Gaia)	10,152 K
Size (Gaia)	6.29 x the Sun
Mass (Gaia)	3.61 x the Sun
Luminosity (Gaia)	378.69 x the Sun
Colour, Gaia BP-RP	0.29
RUWE (Gaia)	7.60 - hints at a hidden companion star
Radial velocity (Gaia)	speed changes by 20 km/s - likely an orbiting pair
Gaia G mag	9.22
TESS mag	9.105

Names & neighbours

TIC ID	139079180
Gaia DR3 ID	1972336810121812224
SIMBAD name	BD+45 3515 [*]
Nearest known variable	Gaia DR3 1972336874535570560 (ROT), 53" away
RA (deg)	320.7
Dec (deg)	46.4362
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)