TIC 421800513

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: in SIMBAD as UCAC4 056-027041 (*); catalogued variable star nearby: Gaia DR3 6355241946589157120 (ROT), 228" away. The rare-find check confirms what is on record - still nice, but not a new discovery.

Superflare notable
A flare releasing roughly 6.8e+35 erg (rough, from TESS's band) on a Sun-like star - a 'superflare', more than 10x the biggest flare ever seen on the Sun.

Checked, nothing found (8)

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

Checked 2026-10-12 14:47 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Notable, already known: Superflare (in SIMBAD as UCAC4 056-027041 (*); catalogued variable star nearby: Gaia DR3 6355241946589157120 (ROT), 228" away). Found automatically by hunt.py in TESS sector 13 (flagged in 2 sector(s)). Detection score 434.9. 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: 2026-10-12 Rare-find check: Superflare 2026-10-09 Found by the automatic search in TESS sector 13

The signal

Type	Eclipsing binary
Status	Notable, already known
Period (days)	2.71594
Period source	hunt.py on TESS QLP sector 13
Eclipse / dip depth	7.0%
Amplitude	0.8%
Data used	TESS sector 13 (QLP)

The star (Gaia & TESS)

Distance (pc)	322 (~1,052 light years)
Temperature (Gaia)	5,182 K
Size (Gaia)	1.08 x the Sun
Mass (Gaia)	0.90 x the Sun
Luminosity (Gaia)	0.75 x the Sun
Colour, Gaia BP-RP	1.13
RUWE (Gaia)	1.06 - fits a single star
Gaia G mag	12.89
TESS mag	12.31

Names & neighbours

TIC ID	421800513
Gaia DR3 ID	6355242118387859072
SIMBAD name	UCAC4 056-027041 [*]
Nearest known variable	Gaia DR3 6355241946589157120 (ROT), 228" away
RA (deg)	331.519
Dec (deg)	-78.856
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-09
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)