TIC 198485674

Transit candidateRare, already known

Rare & notable finds

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

Already known: catalogued variable star nearby: KW Com (E+UV, P = 1.8832 d), 175" away; in the ATLAS variable-star catalogue (Heinze et al. 2018) as J193.3500+22.7739. The rare-find check confirms what is on record - still nice, but not a new discovery.

Ultra-short-period planet notable
One orbit takes 11.5 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).
Transit duration (TDV) hint
The transit length changes from one transit to the next beyond the errors - a sign of a wobbling orbit (moon) or a precessing orbit.

Checked, nothing found (7)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Changing transit depth · Lopsided transit · Type of star

Checked 2026-10-11 17:10 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; Transit duration (TDV) (catalogued variable star nearby: KW Com (E+UV, P = 1.8832 d), 175" away; in the ATLAS variable-star catalogue (Heinze et al. 2018) as J193.3500+22.7739). Found automatically by hunt.py in TESS sector 23 (flagged in 1 sector(s)). Detection score 50.9. 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: Transit duration (TDV); 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)	0.477197
Period source	hunt.py on TESS QLP sector 23
Eclipse / dip depth	1.2%
Amplitude	1.3%
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	~17.2 Earth radii (~1.53 Jupiter)

The star (Gaia & TESS)

Distance (pc)	793 (~2,587 light years)
Temperature (Gaia)	5,684 K
Size (Gaia)	1.58 x the Sun
Mass (Gaia)	1.03 x the Sun
Luminosity (Gaia)	2.36 x the Sun
Colour, Gaia BP-RP	0.80
RUWE (Gaia)	1.06 - fits a single star
Gaia G mag	13.18
TESS mag	12.77

Names & neighbours

TIC ID	198485674
Gaia DR3 ID	3956695469904073600
SIMBAD name	not in SIMBAD
Nearest known variable	KW Com (E+UV, P = 1.8832 d), 175" away
RA (deg)	193.351
Dec (deg)	22.7772
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)