SharePoint 2013: Get the Orphaned Site Collection using powerShell

if ((Get-PSSnapin -Name Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue) -eq $null )

{Add-PSSnapin Microsoft.SharePoint.Powershell}

$OrpCnt =  Get-SPContentDatabase

ForEach ($Orp in $OrpCnt)

{   

      $Sts = Get-SPWebApplication -Limit All | Get-SPSite
      Write-Host "Detecting Orphans for " $Orp.Name  $Sts.Name  $Orp.Repair($false) 

}

Get-SPWebApplication -Limit All | Get-SPSite | Format-Table -Property URL,ContentDatabase