TIC 71396049
Transit candidateRare, already known
Rare & notable finds
Something unusual, worth a look - less certain than a significant find. How these checks work →
Already known: in SIMBAD as UCAC4 801-017900 (SB*). The rare-find check confirms what is on record - still nice, but not a new discovery.
- Microlensing (rogue planet?) hint
A one-off, symmetric brightening at BTJD 3313.73 that fits the gravitational-lens shape better than a flare (Einstein time 41.2 h). This length points to a star or brown dwarf as the lens. Very rare in TESS data; scattered light and asteroids can mimic it. - Changing transit depth hint
The dip depth changes by 14% between transits - a disintegrating planet trailing dust, starspots, or light from another star mixing in. - Lopsided transit hint
The start of the transit is deeper than the end: a dust tail (disintegrating planet), rings, a fast-spinning star, or a blend.
Checked, nothing found (5)
Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Type of star
Checked 2026-10-11 16:31 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: Microlensing (rogue planet?); Changing transit depth; Lopsided transit (in SIMBAD as UCAC4 801-017900 (SB*)).
NOTE: SIMBAD already lists this star (UCAC4 801-017900) as type SB*, so it may be known after all - check the SIMBAD references.
Found automatically by hunt.py in TESS sector 20 (flagged in 1 sector(s)). Detection score 236.5.
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 Planet check: Probably noise or an instrument effect
2026-10-11 Rare-find check: Microlensing (rogue planet?); Changing transit depth; Lopsided transit
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) | 0.439126 |
| Period source | hunt.py on TESS QLP sector 20 |
| Eclipse / dip depth | 2.3% |
| Amplitude | 2.7% |
| Data used | TESS sector 20 (QLP) |
Planet check
| Verdict | Probably noise or an instrument effect |
| Size if it's a planet | ~27.2 Earth radii (~2.43 Jupiter) - too big for a planet |
The star (Gaia & TESS)
| Distance (pc) | 502 (~1,637 light years) |
| Temperature (Gaia) | 5,941 K |
| Size (Gaia) | 1.62 x the Sun |
| Mass (Gaia) | 1.05 x the Sun |
| Luminosity (Gaia) | 2.55 x the Sun |
| Colour, Gaia BP-RP | 0.83 |
| RUWE (Gaia) | 1.59 - hints at a hidden companion star |
| Radial velocity (Gaia) | speed changes by 91 km/s - likely an orbiting pair |
| Gaia G mag | 12.22 |
| TESS mag | 11.8 |
Names & neighbours
| TIC ID | 71396049 |
| Gaia DR3 ID | 1110185721018656384 |
| SIMBAD name | UCAC4 801-017900 [SB*] |
| Nearest known variable | none within 5' |
| RA (deg) | 116.126 |
| Dec (deg) | 70.0943 |
| Look it up | SIMBAD · VSX · ESASky · ExoFOP |
Record
| Found by | hunt.py (automatic) |
| Date | 2026-10-11 |
| 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.
Data files
- 10_rare_check.png 76 KB
- 5_planet_check.png 135 KB
- TIC71396049_s0020.fits 76 KB
- TIC71396049_s0020.png 46 KB
- lightcurve_all_sectors.csv 1 MB
- planet_check.json 4 KB
- rare_check.json 10 KB
- thumb.png 53 KB
- meta.json
