TIC 152799053

Transit candidateKnown to NASA (TOI)

Rare & notable finds

A notable find: not unheard of, but the kind of system astronomers are glad to have more of. How these checks work →

Already known: on NASA's TESS list as CTOI 152799053.01 (PC); in SIMBAD as TYC 8008-881-1 (*); same period as the known variable ASASSN-V J225342.47-402020.8. The rare-find check confirms what is on record - still nice, but not a new discovery.

Ultra-short-period planet notable
One orbit takes 12.9 hours - ultra-short-period planets are found around only ~0.5% of stars.
Hot Neptune desert notable
A 5.4 Earth-radius planet on a 0.54-day orbit sits in the 'hot Neptune desert', where very few planets are known.

Checked, nothing found (8)

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

Checked 2026-10-11 17:24 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Already known to NASA: CTOI 152799053.01 (PC). Notable, already known: Ultra-short-period planet; Hot Neptune desert (on NASA's TESS list as CTOI 152799053.01 (PC); in SIMBAD as TYC 8008-881-1 (*)). Already on NASA's TESS list as CTOI 152799053.01 (PC). WARNING: same period as the known variable ASASSN-V J225342.47-402020.8 77" away; the signal is probably its light leaking in. Found automatically by hunt.py in TESS sector 28 (flagged in 2 sector(s)). Detection score 87.1. 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: 2026-10-12 Rare-find check: Ultra-short-period planet; Hot Neptune desert 2026-10-12 Found on NASA's list of TESS planet candidates: CTOI 152799053.01 (PC) 2026-10-12 Planet check: Already known to NASA: CTOI 152799053.01 (PC) 2026-10-12 Found by the automatic search in TESS sector 28

The signal

Type	Transit candidate
Status	Known to NASA (TOI)
Period (days)	0.537993
Period source	hunt.py on TESS QLP sector 28
Eclipse / dip depth	0.6%
Amplitude	1.0%
Data used	TESS sector 28 (QLP)

Planet check

Verdict	Already known to NASA: CTOI 152799053.01 (PC) ExoFOP check plot all test results light curve data
Size if it's a planet	~5.4 Earth radii (~0.48 Jupiter)

The star (Gaia & TESS)

Distance (pc)	201 (~655 light years)
Temperature (Gaia)	5,227 K
Size (Gaia)	0.86 x the Sun
Mass (Gaia)	0.83 x the Sun
Luminosity (Gaia)	0.50 x the Sun
Colour, Gaia BP-RP	0.98
RUWE (Gaia)	0.96 - fits a single star
Gaia G mag	11.98
TESS mag	11.47

Names & neighbours

TIC ID	152799053
Gaia DR3 ID	6546199658606958208
SIMBAD name	TYC 8008-881-1 [*]
Nearest known variable	ASASSN-V J225342.47-402020.8 (EA, P = 1.0758 d), 77" away (same period!)
RA (deg)	343.403
Dec (deg)	-40.35
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)