TIC 156892633

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: in SIMBAD as BD+43 1665 (*); catalogued variable star nearby: Gaia DR3 949833288821137536 (E, P = 2.4689 d), 265" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Transit timing (TTV) significant
The transits arrive early or late by 2.9 min (typical error 1.1 min) repeating every ~57.3 orbits: something is tugging on the planet - another planet, or a moon.

Checked, nothing found (7)

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

Checked 2026-10-11 16:22 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: Transit timing (TTV) (in SIMBAD as BD+43 1665 (*); catalogued variable star nearby: Gaia DR3 949833288821137536 (E, P = 2.4689 d), 265" away). Found automatically by hunt.py in TESS sector 20 (flagged in 1 sector(s)). Detection score 872.5. 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: 2026-10-11 Period refined to 0.8881684 days using all TESS sectors 2026-10-11 Artist's impression added 2026-10-11 Rare-find check: Transit timing (TTV) 2026-10-11 Planet check: Probably noise or an instrument effect 2026-10-11 Gaia hints at a hidden companion star (RUWE 1.6) 2026-10-11 Found by the automatic search in TESS sector 20

The signal

Type	Transit candidate
Status	Rare, already known
Period (days)	0.8881684
Period source	eclipse fit to TESS sectors [20, 47, 60]
Eclipse / dip depth	1.6%
Amplitude	1.7%
Data used	TESS sector 20 (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	~45.0 Earth radii (~4.01 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	292 (~952 light years)
Temperature (Gaia)	6,238 K
Size (Gaia)	3.05 x the Sun
Mass (Gaia)	1.69 x the Sun
Luminosity (Gaia)	12.73 x the Sun
Colour, Gaia BP-RP	0.65
RUWE (Gaia)	1.60 - hints at a hidden companion star
Gaia G mag	9.23
TESS mag	8.87

Names & neighbours

TIC ID	156892633
Gaia DR3 ID	949830097661078400
SIMBAD name	BD+43 1665 [*]
Nearest known variable	Gaia DR3 949833288821137536 (E, P = 2.4689 d), 265" away
RA (deg)	108.963
Dec (deg)	43.1264
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

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

✦ Artist's impression

3D render · not AI-generated · made locally

What this picture shows

Artist's impression of an UNCONFIRMED candidate, based on its measured data. Two stars of about 6,200 K and 3,100 K (2.1 and 1.3 times the Sun's radius, ~1.2 and ~0.6 solar masses) orbit each other every 21.3 hours, 3.3 million km apart (the Sun-Mercury distance is 58 million km). We see the orbit at 50 degrees (90 = exactly edge-on), close enough to edge-on that they eclipse each other. Sizes, separation, tilt and colours come from fitting the TESS eclipses (see the model-fit plot) plus Gaia's temperature; masses assume normal main-sequence stars. Surface texture, glowing halos, the viewpoint and the background are artistic. The secondary eclipse arrives 64 minutes earlier than half an orbit after the primary, a sign of a slightly oval (eccentric) orbit: e*cos(omega) = -0.0785.

How it was made

A 3D render made in Blender on a home PC, not by AI.

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)