diff --git a/src/applications/project/remarkup/ProjectRemarkupRule.php b/src/applications/project/remarkup/ProjectRemarkupRule.php
--- a/src/applications/project/remarkup/ProjectRemarkupRule.php
+++ b/src/applications/project/remarkup/ProjectRemarkupRule.php
@@ -32,7 +32,7 @@
     // controlling and these names should parse correctly.
 
     // These characters may never appear anywhere in a hashtag.
-    $never = '\s?!,:;{}#\\(\\)"\'';
+    $never = '\s?!,:;{}#\\(\\)"\'\\*/~';
 
     // These characters may not appear at the edge of the string.
     $never_edge = '.';
diff --git a/src/applications/project/remarkup/__tests__/ProjectRemarkupRuleTestCase.php b/src/applications/project/remarkup/__tests__/ProjectRemarkupRuleTestCase.php
--- a/src/applications/project/remarkup/__tests__/ProjectRemarkupRuleTestCase.php
+++ b/src/applications/project/remarkup/__tests__/ProjectRemarkupRuleTestCase.php
@@ -125,6 +125,16 @@
         ),
       ),
 
+      '**#orbital**' => array(
+        'embed' => array(),
+        'ref' => array(
+          array(
+            'offset' => 3,
+            'id' => 'orbital',
+          ),
+        ),
+      ),
+
     );
 
     foreach ($cases as $input => $expect) {