TIC 434105231

Transit candidateRare, already known

Rare & notable finds

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

Already known: on NASA's TESS list as TOI 311.01 (APC); in the ATLAS variable-star catalogue (Heinze et al. 2018) as J354.3357-13.4557; SIMBAD lists TOI-311 also as TOI-311; in SIMBAD as TOI-311 (PM*), 1.6" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Ultra-short-period planet notable
One orbit takes 19.1 hours - ultra-short-period planets are found around only ~0.5% of stars.
Lopsided transit hint
The end of the transit is deeper than the start: a dust tail (disintegrating planet), rings, a fast-spinning star, or a blend.

Checked, nothing found (10)

Microlensing (rogue planet?) · Superflare · Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Dimming beside the transit · Trojan companions (L4/L5) · Type of star

Checked 2026-10-11 17:08 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Already known to NASA: TOI 311.01 (APC). Rare, already known: Ultra-short-period planet; Lopsided transit (on NASA's TESS list as TOI 311.01 (APC); in the ATLAS variable-star catalogue (Heinze et al. 2018) as J354.3357-13.4557). Already on NASA's TESS list as TOI 311.01 (APC). Found automatically by hunt.py in TESS sector 29 (flagged in 2 sector(s)). Detection score 62.4. 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: 2026-10-12 Rare-find check: Lopsided transit; Ultra-short-period planet 2026-10-12 Gaia hints at a hidden companion star (RUWE 3.7) 2026-10-12 Found on NASA's list of TESS planet candidates: TOI 311.01 (APC) 2026-10-12 Planet check: Already known to NASA: TOI 311.01 (APC) 2026-10-12 Found by the automatic search in TESS sector 29

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	0.796551
Period source	hunt.py on TESS QLP sector 29
Eclipse / dip depth	1.9%
Amplitude	1.4%
Data used	TESS sector 29 (QLP)

Planet check

Verdict	Already known to NASA: TOI 311.01 (APC) ExoFOP check plot all test results light curve data
Size if it's a planet	~13.6 Earth radii (~1.21 Jupiter)

The star (Gaia & TESS)

Distance (pc)	233 (~760 light years)
Temperature (Gaia)	4,435 K
Size (Gaia)	0.98 x the Sun
Mass (Gaia)	0.73 x the Sun
Luminosity (Gaia)	0.21 x the Sun
Colour, Gaia BP-RP	1.74
RUWE (Gaia)	3.66 - hints at a hidden companion star
Gaia G mag	13.77
TESS mag	12.95

Names & neighbours

TIC ID	434105231
Gaia DR3 ID	2432077290659277952
SIMBAD name	TOI-311 [PM*], 1.6" away
Nearest known variable	none within 5'
RA (deg)	354.336
Dec (deg)	-13.4557
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-12
Last update	2026-10-12

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)