LRLL 54361 also known as L54361 is thought to be a binary protostar producing strobe-like flashes, located in the constellation Perseus in the star-forming region IC 348 and 950 light-years away.

LRLL 54361 emits a burst of light at regular intervals of 25.34 days, increasing in infrared luminosity by an order of magnitude over a span of a week and then gradually dimming until the next pulse.

[2] This behavior be caused by repeated close approaches between the two component stars which are gravitationally linked in an eccentric orbit.

LRLL 54361 was first detected by the Spitzer Space Telescope as a variable object inside the star-forming region IC 348.

The monitoring of LRLL 54361 continues using other instruments, including the Herschel Space Telescope, and astronomers hope to obtain more direct measurements of the binary star and its orbit.