TIC 139256217
Transit candidateProbably known
Notes
NOTE: SIMBAD already lists this star (TYC 8448-418-1) as type SB*, so it may be known after all - check the SIMBAD references.
Found automatically by hunt.py in TESS sector 28 (flagged in 1 sector(s)). Detection score 283.6.
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 Gaia hints at a hidden companion star (RUWE 1.4)
2026-10-12 Found by the automatic search in TESS sector 28
The signal
| Type | Transit candidate |
| Status | Probably known |
| Period (days) | 2.19924 |
| Period source | hunt.py on TESS QLP sector 28 |
| Eclipse / dip depth | 1.6% |
| Amplitude | 1.8% |
| Data used | TESS sector 28 (QLP) |
The star (Gaia & TESS)
| Distance (pc) | 416 (~1,355 light years) |
| Temperature (Gaia) | 6,088 K |
| Size (Gaia) | 1.66 x the Sun |
| Mass (Gaia) | 1.26 x the Sun |
| Luminosity (Gaia) | 3.43 x the Sun |
| Colour, Gaia BP-RP | 0.72 |
| RUWE (Gaia) | 1.43 - hints at a hidden companion star |
| Radial velocity (Gaia) | speed changes by 54 km/s - likely an orbiting pair |
| Gaia G mag | 11.39 |
| TESS mag | 11 |
Names & neighbours
| TIC ID | 139256217 |
| Gaia DR3 ID | 6539811294186454272 |
| SIMBAD name | TYC 8448-418-1 [SB*] |
| Nearest known variable | SSS_J230830.4-460534 (EW, P = 0.28254 d), 170" away |
| RA (deg) | 347.19 |
| Dec (deg) | -46.1102 |
| Look it up | SIMBAD · VSX · ESASky · ExoFOP |
Record
| Found by | hunt.py (automatic) |
| Date | 2026-10-12 |
| 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.
Data files
- TIC139256217_s0028.fits 200 KB
- TIC139256217_s0028.png 69 KB
- thumb.png 85 KB
- meta.json
