TIC 455691857

Transit candidateRare, already known

Rare & notable finds

Something genuinely unusual turned up. Treat it as a lead: every one of these has ordinary explanations too, listed with each. How these checks work →

Already known: in SIMBAD as UCAC4 674-111420 (SB*); catalogued variable star nearby: Gaia DR3 1961874063624122112 (S), 124" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Transit timing (TTV) significant
The transits arrive early or late by 4.5 min (typical error 1.5 min) repeating every ~258.9 orbits: something is tugging on the planet - another planet, or a moon.
Transits of a giant star notable
Gaia places this star among the giants: planets transiting giants are rare, and a big star makes even a large planet's dip tiny.

Checked, nothing found (7)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit duration (TDV) · Changing transit depth · Lopsided transit · Dimming beside the transit

Checked 2026-10-11 16:39 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: Transit timing (TTV); Transits of a giant star (in SIMBAD as UCAC4 674-111420 (SB*); catalogued variable star nearby: Gaia DR3 1961874063624122112 (S), 124" away). NOTE: SIMBAD already lists this star (UCAC4 674-111420) as type SB*, so it may be known after all - check the SIMBAD references. Found automatically by hunt.py in TESS sector 16 (flagged in 1 sector(s)). Detection score 181.1. 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: 2026-10-11 Planet check: Probably noise or an instrument effect 2026-10-11 Rare-find check: Transit timing (TTV); Transits of a giant star 2026-10-11 Gaia hints at a hidden companion star (RUWE 47.2) 2026-10-11 Found by the automatic search in TESS sector 16

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	1.20186
Period source	hunt.py on TESS QLP sector 16
Eclipse / dip depth	1.8%
Amplitude	1.8%
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	~117.7 Earth radii (~10.5 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	2,288 (~7,463 light years)
Temperature (Gaia)	6,634 K
Size (Gaia)	8.29 x the Sun
Mass (Gaia)	2.96 x the Sun
Luminosity (Gaia)	125.88 x the Sun
Colour, Gaia BP-RP	1.22
RUWE (Gaia)	47.25 - hints at a hidden companion star
Radial velocity (Gaia)	speed changes by 55 km/s - likely an orbiting pair
Gaia G mag	12.29
TESS mag	11.62

Names & neighbours

TIC ID	455691857
Gaia DR3 ID	1961874475941120768
SIMBAD name	UCAC4 674-111420 [SB*]
Nearest known variable	Gaia DR3 1961874063624122112 (S), 124" away
RA (deg)	332.997
Dec (deg)	44.7626
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)