PHP PDO Error message

I'm getting an error:
Notice: Trying to get property of non-object in... Line: 3

$asset = new ShowAssets();
$ass = $asset->Asset($_GET['id']);
echo '<form action="edit_asset.php?id='. $ass->asset_id .'" method="post">

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here is the function:

function Asset($id = 0) {
			$pdo = new PDO("mysql:host=localhost);
			$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
			$sqla = "SELET *
					FROM assets
					WHERE asset_id = :id";
			$asset = $pdo->prepare($sqla);
			$asset->bindParam(':id', $id, PDO::PARAM_STR);
			
			try	{
				$asset->execute(array('id' => $id));	
				$results = $asset->fetch();
				return $results;
			}
			catch(PDOException $a) {
   				echo 'ERROR: ' . $a->getMessage();
			}
		}

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I have no clue what the issue is.