TIC 159991426

Transit candidateRare, already known

Rare & notable finds

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

Already known: in SIMBAD as BD+36 2087 (PM*). The rare-find check confirms what is on record - still nice, but not a new discovery.

Microlensing (rogue planet?) hint
A one-off, symmetric brightening at BTJD 2621.59 that fits the gravitational-lens shape better than a flare (Einstein time 24.6 h). This length points to a star or brown dwarf as the lens. Very rare in TESS data; scattered light and asteroids can mimic it.
Ultra-short-period planet notable
One orbit takes 23.9 hours - ultra-short-period planets are found around only ~0.5% of stars (if the signal is a real planet - it hasn't passed the planet check).
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 (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 16:53 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: Microlensing (rogue planet?); Ultra-short-period planet; Lopsided transit (in SIMBAD as BD+36 2087 (PM*)). Found automatically by hunt.py in TESS sector 21 (flagged in 1 sector(s)). Detection score 99.3. 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: Microlensing (rogue planet?); Lopsided transit; Ultra-short-period planet 2026-10-11 Found by the automatic search in TESS sector 21

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	0.996433
Period source	hunt.py on TESS QLP sector 21
Eclipse / dip depth	0.6%
Amplitude	0.4%
Data used	TESS sector 21 (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	~10.5 Earth radii (~0.94 Jupiter)

The star (Gaia & TESS)

Distance (pc)	234 (~765 light years)
Temperature (Gaia)	6,055 K
Size (Gaia)	1.16 x the Sun
Mass (Gaia)	1.09 x the Sun
Luminosity (Gaia)	1.62 x the Sun
Colour, Gaia BP-RP	0.74
RUWE (Gaia)	1.25 - fits a single star
Gaia G mag	11.09
TESS mag	10.68

Names & neighbours

TIC ID	159991426
Gaia DR3 ID	751398382337463168
SIMBAD name	BD+36 2087 [PM*]
Nearest known variable	none within 5'
RA (deg)	158.924
Dec (deg)	35.7819
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-11
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.

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Data files

Download everything (.zip)