TIC 394089153

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 859-010419 (*); catalogued variable star nearby: Gaia DR3 2296289975451672832 (E, P = 0.42312 d), 122" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Single transit of another planet significant
Besides the known planet: the dip is not alone: 3 similar dips at regular intervals (first at BTJD 2734.42) - a periodic transit worth a full planet check.
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 (11)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Lopsided transit · Dimming beside the transit · Trojan companions (L4/L5) · More planets in the system · Self-lensing binary

Checked 2026-10-11 16:29 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: Single transit of another planet; Transits of a giant star (in SIMBAD as UCAC4 859-010419 (*); catalogued variable star nearby: Gaia DR3 2296289975451672832 (E, P = 0.42312 d), 122" away). Found automatically by hunt.py in TESS sector 14 (flagged in 2 sector(s)). Detection score 304.6. 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: Single transit of another planet; Transits of a giant star 2026-10-09 Gaia hints at a hidden companion star (RUWE 29.4) 2026-10-09 Found by the automatic search in TESS sector 14

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	2.92193
Period source	hunt.py on TESS QLP sector 14
Eclipse / dip depth	4.3%
Amplitude	1.8%
Data used	TESS sector 14 (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	~76.4 Earth radii (~6.82 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	1,522 (~4,964 light years)
Temperature (Gaia)	4,833 K
Size (Gaia)	3.47 x the Sun
Mass (Gaia)	1.35 x the Sun
Luminosity (Gaia)	7.28 x the Sun
Colour, Gaia BP-RP	1.23
RUWE (Gaia)	29.36 - hints at a hidden companion star
Gaia G mag	12.47
TESS mag	11.82

Names & neighbours

TIC ID	394089153
Gaia DR3 ID	2296290250329577344
SIMBAD name	UCAC4 859-010419 [*]
Nearest known variable	Gaia DR3 2296289975451672832 (E, P = 0.42312 d), 122" away
RA (deg)	283.969
Dec (deg)	81.7238
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-09
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)