diff --git a/src/components/Table.vue b/src/components/Table.vue
index e4d59169..2ebdc007 100644
--- a/src/components/Table.vue
+++ b/src/components/Table.vue
@@ -76,6 +76,7 @@ export default {
     delta: 2,
     selectedSN: null,
     deltaTimes: [
+      { text: "Last 12 Hours", value: 0.5 },
       { text: "Last 24 Hours", value: 1 },
       { text: "Last 48 Hours", value: 2 },
       { text: "Last 72 Hours", value: 3 },
diff --git a/src/store.js b/src/store.js
index a719ab77..555344a6 100644
--- a/src/store.js
+++ b/src/store.js
@@ -230,7 +230,7 @@ export default new Vuex.Store({
       //Calculate stuff
       var date = new Date();
       var now_mjd = dateToJD(date);
-      var last_mjd = dateToJD(date.subsDays(delta));
+      var last_mjd = now_mjd - delta;
 
       var parameters = {
         records_per_pages: nCandidates,