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Molecular clouds at very high latitude ($b>60^{\circ}$) away from theGalactic plane are rare and in general are expected to be non-star-forming.However, we report the discovery of two embedded clusters (Camargo 438 andCamargo 439) within the high-latitude molecular cloud HRK 81.4-77.8 using WISE.Camargo 439 with Galactic coordinates $\ell=81.11^{\circ}$ and$b=-77.84^{\circ}$ is an $\sim2$ Myr embedded cluster (EC) located at adistance from the Sun of $d_{\odot}=5.09\pm0.47$ kpc. Adopting the distance ofthe Sun to the Galactic centre $R_{\odot}=7.2$ kpc we derive for Camargo 439 aGalactocentric distance of $R_{GC}=8.70\pm0.26$ kpc and a vertical distancefrom the plane of $-4.97\pm0.46$ kpc. Camargo 438 at $\ell=79.66^{\circ}$ and$b=-78.86^{\circ}$ presents similar values. The derived parameters for thesetwo ECs put HRK 81.4-77.8 in the halo at a distance from the Galactic centre of$\sim8.7$ kpc and $\sim5.0$ kpc from the disc. Star clusters provide the onlydirect means to determine the high latitude molecular cloud distances. Thepresent study shows that the molecular cloud HRK 81.4-77.8 is currently formingstars, apparently an unprecedented event detected so far among high latitudeclouds. We carried out a preliminary orbit analysis. It shows that this ECs arethe most distant known embedded clusters from the plane and both cloud andclusters are probably falling ballistically from the halo onto the Galacticdisc, or performing a flyby.

Discovery of two embedded clusters with WISE in the high Galactic latitude cloud HRK 81.4-77.8