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Bright-rimmed clouds (BRCs) are ideal candidates to study radiation-drivenimplosion mode of star formation as they are potential sites of triggered starformation, located at the edges of H{\sc ii} regions, showing evidence ofongoing star formation processes. BRC 18 is located towards the eastern edge ofrelatively closer ($\sim$400 pc) H{\sc ii} region excited by $\lambda$ Ori. Wemade R-band polarimetric observations of 17 candidate young stellar objects(YSOs) located towards BRC 18 to investigate any preferred orientation of thediscs with respect to the ambient magnetic field and the direction of energeticphotons from $\lambda$ Ori. We found that the discs are oriented randomly withrespect to the projected magnetic field. Using distances and proper motionsfrom the \textit{Gaia} EDR3 of the candidate YSOs, we investigated the possibleacceleration of BRC 18, away from $\lambda$ Ori due to the well known "RocketEffect", by assuming that both the candidate YSOs and BRC 18 are kinematicallycoupled. The relative proper motions of the candidate YSOs are found to show atrend of moving away from $\lambda$ Ori. We computed the offset between theangle of the direction of the ionization front and the relative proper motionof the candidate YSOs and found it to lie close to being parallel to eachother. Additionally, we found 12 sources that are comoving with the knowncandidate YSOs towards BRC 18. These comoving sources are most likely to beyoung and are missed in previous surveys conducted to identify potential YSOsof the region.

Investigation of Rocket Effect in BRC 18 using Gaia EDR3