I am trying to find the Asset history for a particular host. To be more specific I need first scan date, last scan date, date added to asset group, and Host discovery date.
You should be able to find details of asset group changes in the activity log: go to Users -> Activity Log, click the Search button and enter the IP in the Details field. This should also show scan activity so you may get all this information in one search.
The last scan date is shown in the Asset Search results, which is covered in the response to your later post.
Retrieving data ...