TIC 401863188
Eclipsing binaryProbably known
Notes
NOTE: SIMBAD already lists this star (TYC 9431-2701-1) as type SB*, so it may be known after all - check the SIMBAD references.
Found automatically by hunt.py in TESS sector 12 (flagged in 1 sector(s)). Detection score 336.5.
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:
2026-10-06 Gaia hints at a hidden companion star (RUWE 5.5)
2026-10-06 Found by the automatic search in TESS sector 12
The signal
| Type | Eclipsing binary |
| Status | Probably known |
| Period (days) | 1.15407 |
| Period source | hunt.py on TESS QLP sector 12 |
| Eclipse / dip depth | 4.4% |
| Amplitude | 3.1% |
| Data used | TESS sector 12 (QLP) |
The star (Gaia & TESS)
| Distance (pc) | 809 (~2,637 light years) |
| Temperature (Gaia) | 6,626 K |
| Size (Gaia) | 2.14 x the Sun |
| Mass (Gaia) | 1.54 x the Sun |
| Luminosity (Gaia) | 7.90 x the Sun |
| Colour, Gaia BP-RP | 0.64 |
| RUWE (Gaia) | 5.47 - hints at a hidden companion star |
| Radial velocity (Gaia) | speed changes by 50 km/s - likely an orbiting pair |
| Gaia G mag | 12.14 |
| TESS mag | 11.8 |
Names & neighbours
| TIC ID | 401863188 |
| Gaia DR3 ID | 5786733721377141888 |
| SIMBAD name | TYC 9431-2701-1 [SB*] |
| Nearest known variable | Gaia DR3 5786733687017399552 (ROT), 55" away |
| RA (deg) | 217.834 |
| Dec (deg) | -76.9508 |
| Look it up | SIMBAD · VSX · ESASky · ExoFOP |
Record
| Found by | hunt.py (automatic) |
| Date | 2026-10-06 |
| Last update | 2026-10-06 |
Where it sits among the stars
ESA Gaia colour and true brightness. Grey: every Star Log candidate. Orange: this star.
Data files
- TIC401863188_s0012.fits 82 KB
- TIC401863188_s0012.png 45 KB
- thumb.png 42 KB
- meta.json
