diff --git a/time4j-android/src/main/java/net/time4j/calendar/astro/MoonPosition.java b/time4j-android/src/main/java/net/time4j/calendar/astro/MoonPosition.java
index 3bcb190..057c0a4 100644
--- a/time4j-android/src/main/java/net/time4j/calendar/astro/MoonPosition.java
+++ b/time4j-android/src/main/java/net/time4j/calendar/astro/MoonPosition.java
@@ -709,7 +709,7 @@ private static Moment calculateMeeus50(
             sum += (c * Math.sin(Math.toRadians(arg)));
         }
 
-        return JulianDay.ofEphemerisTime(jde + sum).toMoment();
+        return JulianDay.ofEphemerisTime(jde + sum).toMoment().with(Moment.PRECISION, TimeUnit.MINUTES);
 
     }
 
@@ -719,18 +719,19 @@ private static Moment anomalistic(
     ) {
 
         // first calculate an approximate anomalistic lunation which is rather too small
-        PlainDate date = after.toZonalTimestamp(ZonalOffset.UTC).toDate();
+        Moment ref = after.with(Moment.PRECISION, TimeUnit.MINUTES);
+        PlainDate date = ref.toZonalTimestamp(ZonalOffset.UTC).toDate();
         double doy = date.getDayOfYear();
         int lunation = (int) Math.floor((date.getYear() + (doy / date.lengthOfYear()) - 1999.97) * 13.2555);
 
         Moment m = calculateMeeus50(lunation, apogee);
 
-        while (m.isBefore(after) || m.isSimultaneous(after)) {
+        while (!m.isAfter(ref)) {
             lunation++;
             m = calculateMeeus50(lunation, apogee);
         }
 
-        return m.with(Moment.PRECISION, TimeUnit.MINUTES);
+        return m;
 
     }