TIC 421331604

Single dip / odd eventKnown to NASA (TOI)

Notes

Already known to NASA: CTOI 421331604.01 (PC). Already on NASA's TESS list as CTOI 421331604.01 (PC). NOTE: SIMBAD already lists this star (TYC 3920-191-1) as type SB*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 15 (flagged in 4 sector(s)). Detection score 191.1. 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: 2026-10-10 Found on NASA's list of TESS planet candidates: CTOI 421331604.01 (PC) 2026-10-10 Planet check: Already known to NASA: CTOI 421331604.01 (PC) 2026-10-10 Found by the automatic search in TESS sector 15

The signal

Type	Single dip / odd event
Status	Known to NASA (TOI)
Period source	hunt.py on TESS QLP sector 15
Amplitude	0.3%
Data used	TESS sector 15 (QLP)

Planet check

Verdict

Already known to NASA: CTOI 421331604.01 (PC)

ExoFOP

The star (Gaia & TESS)

Distance (pc)	574 (~1,872 light years)
Temperature (Gaia)	5,908 K
Size (Gaia)	1.91 x the Sun
Mass (Gaia)	1.19 x the Sun
Luminosity (Gaia)	4.01 x the Sun
Colour, Gaia BP-RP	0.74
RUWE (Gaia)	0.98 - fits a single star
Radial velocity (Gaia)	speed changes by 60 km/s - likely an orbiting pair
Gaia G mag	11.91
TESS mag	11.52

Names & neighbours

TIC ID	421331604
Gaia DR3 ID	2139755043329847808
SIMBAD name	TYC 3920-191-1 [SB*]
Nearest known variable	Gaia DR3 2139766347683963776 (E, P = 0.61279 d), 137" away
RA (deg)	289.137
Dec (deg)	54.1116
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

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

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)