Hey mcmillan,
The rule of thumb is waiting 6 months between applications, though I’ve heard of people here applying for other cards after having their CapOne for a few months and being approved. If you do not have any delinquencies on your reports, I would say it is possible. Have you applied for other cards recently?
You risk getting denied if you have delinquencies and the new inquires on your report (capOne pulls all 3) will bring your scores down, but this is going to happen even if you get approved.
CapOne has a preaproval page, have you tried it yet? https://findmycard.capitalone.com/PageVersions/LandingPages/LP_UNS_UM_V02.aspx