TIC 273850708

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: on NASA's TESS list as TOI 2616.01 (PC); SIMBAD lists TOI-2616 also as TOI-2616; in SIMBAD as TOI-2616 (*). The rare-find check confirms what is on record - still nice, but not a new discovery.

Microlensing (rogue planet?) significant
A one-off, symmetric brightening at BTJD 3899.65 that fits the gravitational-lens shape better than a flare (Einstein time 12.1 h). Events this short can be made by a free-floating (rogue) planet passing in front of the star. Very rare in TESS data; scattered light and asteroids can mimic it.
Lopsided transit hint
The start of the transit is deeper than the end: a dust tail (disintegrating planet), rings, a fast-spinning star, or a blend.
Single transit of another planet notable
Besides the known planet: one transit-like dip at BTJD 2099.45, 3.6 h long and 1.67% deep (~9.6 Earth radii). For a dip this long the orbit must take at least ~23 days: a cold, long-period planet - rare in TESS data.

Checked, nothing found (8)

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 17:02 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Already known to NASA: TOI 2616.01 (PC). Rare, already known: Microlensing (rogue planet?); Lopsided transit; Single transit of another planet (on NASA's TESS list as TOI 2616.01 (PC); SIMBAD lists TOI-2616 also as TOI-2616). Already on NASA's TESS list as TOI 2616.01 (PC). Found automatically by hunt.py in TESS sector 28 (flagged in 5 sector(s)). Detection score 78.5. 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: Microlensing (rogue planet?); Lopsided transit; Single transit of another planet 2026-10-12 Found on NASA's list of TESS planet candidates: TOI 2616.01 (PC) 2026-10-12 Planet check: Already known to NASA: TOI 2616.01 (PC) 2026-10-12 Found by the automatic search in TESS sector 28

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	1.85339
Period source	hunt.py on TESS QLP sector 28
Eclipse / dip depth	3.2%
Amplitude	1.7%
Data used	TESS sector 28 (QLP)

Planet check

Verdict	Already known to NASA: TOI 2616.01 (PC) ExoFOP check plot all test results light curve data
Size if it's a planet	~12.4 Earth radii (~1.1 Jupiter)

The star (Gaia & TESS)

Distance (pc)	404 (~1,319 light years)
Temperature (Gaia)	5,382 K
Size (Gaia)	0.70 x the Sun
Luminosity (Gaia)	0.37 x the Sun
Colour, Gaia BP-RP	0.97
RUWE (Gaia)	0.97 - fits a single star
Gaia G mag	13.93
TESS mag	13.43

Names & neighbours

TIC ID	273850708
Gaia DR3 ID	4699930970542828416
SIMBAD name	TOI-2616 [*]
Nearest known variable	none within 5'
RA (deg)	34.5622
Dec (deg)	-64.8069
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.

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Data files

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