R Monocerotis, abbreviated R Mon, is a very young binary star[5] system in the equatorial constellation of Monoceros.

The apparent magnitude of R Mon varies between 10 and 12 and the spectral type is B8IIIe.

This disk has a mass of ~0.007 M☉ and extends outward to a distance of under 150 AU from the host.

Because of this dust, the star is obscured from direct visual sight but can still be observed in the infrared.

[5] R Mon is still in the accretion phase of star formation and it is driving an optically opaque bipolar outflow with a velocity of 9 km/s.