When I can apply for citizenship if i got green card in Feb 2010 through asylee status?

Yes, the citizenship rules for asylees are a bit different. Once the asylum status is granted, the date of admission considered to be one year before the date of approval of the adjustment of status application. This means the wait to apply for citizenship is reduced to four years while it is five years for other permanent residents. There may be additional residence and other factors going into whether or not you are eligible for citizenship, so you should always get competent legal counsel before filing any immigration-related paperwork.