TIC 206599822

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 206599822.01 (PC); in SIMBAD as UCAC4 163-001296 (*). The rare-find check confirms what is on record - still nice, but not a new discovery.

Planet around a young star notable
The star spins once every 2.1 days - fast for a 5741 K star, so it is probably young (a few hundred million years). Young planets show how planets change in their first years - few are known.

Checked, nothing found (9)

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

Checked 2026-10-04 22:17 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Already known to NASA: CTOI 206599822.01 (PC). Notable, already known: Planet around a young star (on NASA's TESS list as CTOI 206599822.01 (PC); in SIMBAD as UCAC4 163-001296 (*)). Already on NASA's TESS list as CTOI 206599822.01 (PC). Found automatically by hunt.py in TESS sector 29 (flagged in 3 sector(s)). Detection score 146.8. 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: Planet around a young star 2026-10-12 Gaia hints at a hidden companion star (RUWE 4.9) 2026-10-12 Found on NASA's list of TESS planet candidates: CTOI 206599822.01 (PC) 2026-10-12 Planet check: Already known to NASA: CTOI 206599822.01 (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)	1.076
Period source	hunt.py on TESS QLP sector 29
Eclipse / dip depth	1.1%
Amplitude	0.9%
Data used	TESS sector 29 (QLP)

Planet check

Verdict	Already known to NASA: CTOI 206599822.01 (PC) ExoFOP check plot all test results light curve data
Size if it's a planet	~18.0 Earth radii (~1.6 Jupiter)

The star (Gaia & TESS)

Distance (pc)	508 (~1,656 light years)
Colour, Gaia BP-RP	0.84
RUWE (Gaia)	4.88 - hints at a hidden companion star
Radial velocity (Gaia)	speed changes by 21 km/s - likely an orbiting pair
Gaia G mag	11.99
TESS mag	11.55

Names & neighbours

TIC ID	206599822
Gaia DR3 ID	4909797881673223808
SIMBAD name	UCAC4 163-001296 [*]
Nearest known variable	none within 5'
RA (deg)	21.4618
Dec (deg)	-57.5925
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)