TIC 159871619

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 UCAC4 717-054184 (*); the catalogued variable ASASSN-V J155028.66+531220.8 (EA, 35" away) has the same period - its light leaks into TESS's big pixels; in the TESS eclipsing-binary catalogue (Prsa et al. 2022) as TIC 0159871619; same period as the known variable ASASSN-V J155028.66+531220.8. The rare-find check confirms what is on record - still nice, but not a new discovery.

Ultra-short-period planet notable
One orbit takes 14.5 hours - ultra-short-period planets are found around only ~0.5% of stars (if the signal is a real planet - it hasn't passed the planet check).
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 (8)

Microlensing (rogue planet?) · 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 16:40 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: Ultra-short-period planet; Lopsided transit (in SIMBAD as UCAC4 717-054184 (*); the catalogued variable ASASSN-V J155028.66+531220.8 (EA, 35" away) has the same period - its light leaks into TESS's big pixels). WARNING: same period as the known variable ASASSN-V J155028.66+531220.8 35" away; the signal is probably its light leaking in. Found automatically by hunt.py in TESS sector 23 (flagged in 2 sector(s)). Detection score 174.3. 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: Lopsided transit; Ultra-short-period planet 2026-10-11 Found by the automatic search in TESS sector 23

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	0.604443
Period source	hunt.py on TESS QLP sector 23
Eclipse / dip depth	2.1%
Amplitude	2.3%
Data used	TESS sector 23 (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	~12.2 Earth radii (~1.09 Jupiter)

The star (Gaia & TESS)

Distance (pc)	162 (~528 light years)
Temperature (Gaia)	4,601 K
Size (Gaia)	0.71 x the Sun
Mass (Gaia)	0.72 x the Sun
Luminosity (Gaia)	0.21 x the Sun
Colour, Gaia BP-RP	1.45
RUWE (Gaia)	1.04 - fits a single star
Gaia G mag	12.87
TESS mag	12.15

Names & neighbours

TIC ID	159871619
Gaia DR3 ID	1597110565708365440
SIMBAD name	UCAC4 717-054184 [*]
Nearest known variable	ASASSN-V J155028.66+531220.8 (EA, P = 0.6049 d), 35" away (same period!)
RA (deg)	237.622
Dec (deg)	53.2152
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)