In this paper , the first complete photometric light curves in the B , V , and R passbands for an eclipsing binary LO Com are presented , and the photometric solution for the LO Com is derived by analyzing these light curves by using the Wilson and Devinney code .
From the photometric solution , it is found that the LO Com is a W-type W UMa binary with a mass ratio of q = m _ { 2 } / m _ { 1 } = 2.478 and a contact degree of f = ( 3.2 \pm 0.25 ) \% .
By combining the two new minimum times with those published earlier in the literature , we have found that the ( O - C ) curve shows a downward parabolic variation corresponding to a long-term decrease in the orbital period with a rate of { d } P / { d } t = -1.18 \times 10 ^ { -7 } days yr ^ { -1 } .
This long-term decrease in its orbital period may be caused by mass transfer from the more massive component to the less massive one .