TIC 100798806

Eclipsing binaryNotable, already known

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: the catalogued variable NSVS 8920917 (EA, 35" away) has the same period - its light leaks into TESS's big pixels; same period as the known variable NSVS 8920917. The rare-find check confirms what is on record - still nice, but not a new discovery.

Eccentric eclipsing binary notable
The second eclipse comes at phase 0.184 instead of 0.5: the orbit is stretched (eccentricity at least 0.497). Eccentric binaries show how tides shape orbits, and their slowly turning orbits test General Relativity.

Checked, nothing found (6)

Microlensing (rogue planet?) · Exocomet-shaped dip · Eclipse timing (third body?) · Pulsating star in an eclipsing binary · Extra dips outside the eclipses · Type of star

Checked 2026-10-11 18:51 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Notable, already known: Eccentric eclipsing binary (the catalogued variable NSVS 8920917 (EA, 35" away) has the same period - its light leaks into TESS's big pixels; same period as the known variable NSVS 8920917). WARNING: same period as the known variable NSVS 8920917 35" away; the signal is probably its light leaking in. Found automatically by hunt.py in TESS sector 16 (flagged in 1 sector(s)). Detection score 1424.9. 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 Rare-find check: Eccentric eclipsing binary 2026-10-10 Found by the automatic search in TESS sector 16

The signal

Type	Eclipsing binary
Status	Notable, already known
Period (days)	2.9059
Period source	hunt.py on TESS QLP sector 16
Eclipse / dip depth	65.6%
Amplitude	25.7%
Data used	TESS sector 16 (QLP)

The star (Gaia & TESS)

Distance (pc)	1,063 (~3,466 light years)
Temperature (Gaia)	6,613 K
Size (Gaia)	1.54 x the Sun
Mass (Gaia)	1.34 x the Sun
Luminosity (Gaia)	4.09 x the Sun
Colour, Gaia BP-RP	0.64
RUWE (Gaia)	0.95 - fits a single star
Gaia G mag	13.37
TESS mag	13.05

Names & neighbours

TIC ID	100798806
Gaia DR3 ID	1903389081634220160
SIMBAD name	not in SIMBAD
Nearest known variable	NSVS 8920917 (EA, P = 2.9055 d), 35" away (same period!)
RA (deg)	341.97
Dec (deg)	34.9122
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

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

How to read this diagram →

Data files

Download everything (.zip)