Abstrakt
We present the discovery of a rare system detected in the TESS data showing three different eclipsing-like signals. TIC 452991707 and TIC 452991693 seem to be the second such system on the sky, whose two components separated about 16 '' are gravitationally bounded, or comprise a comoving pair.
The three periods detected from the TESS data are: PA = 1.46155 d, PB = 1.77418 d, and PC = 1.03989 d, respectively. The A and B periods belong to TIC 452991707, while the C comes from the component TIC 452991693.
The pair A shows the deepest eclipses, and its orbit is very slightly eccentric. The third period C has lowest amplitude (eclipsing or ellipsoidal nature), but originates from TIC 452991693, which is connected to A+B because both visual components share similar proper motion and distance.
Long-term collection of data from older photometry from various surveys also shows that the two inner pairs A and B orbit around their barycenter. Its period is probably of a few years, but for a final derivation of its orbital parameters one needs more up-to-date data.
Hence, we call for new observations of this amazing system.