We present HST photometry of the LSB galaxy UGC 5889 and derive its recent star formation history .
In the last 200 Myr the star formation proceeded in modest bursts at a rate of the order of 10 ^ { -2 } -10 ^ { -3 } M _ { \sun } /yr , with periods of extremely low SFR or even quiescence .
The rate derived from the present study for the last 20 Myr is in agreement with the H _ { \alpha } emission from the galaxy .
The presence of a consistent population older than 200 Myr is suggested by the data .
However , observational errors and completeness correction prevent any firm conclusion on the oldest age .
The total mass of stars is of the order of 5.5 \times 10 ^ { 7 } M _ { \sun } .
Even if the recent episodes of star formation have heated the gas and carved a hole in the disk , blow-away of the gas is unlikely to occur .