IOTA Title Image

Lunar Occultations

Total or grazing lunar occultations are among the events with the longest tradition in occultation astronomy.

For total lunar occultations as well as for grazing lunar occultations, the precise knowledge of the lunar limb is an absolute prerequisite. The MOONLIMB program does provide such precise data. An overview is given here.

Grazing Occultations of stars by the moon are local events and thus require an individual selection according to personal observation preferences. The GRAZPREP-software assists in all aspects of finding individually interesting events as well as selecting the best observing stations promising the most contacts between the star and the lunar limb in high resolution. If you are interested in these fascinating events, have a look here.

Members of IOTA get for their own observing stations predictions of lunar occultations, either total or grazing ones, specially calculated for their observatory and/or travel radius in case of mobile stations. Some bright total lunar occultations, as can be seen from a point in central Europe (Frankfurt a.M.) are given as follows:


    Predictions for 2018, Bright total Lunar Occultations, visible from Frankfurt, Main, Germany

  Occultation prediction for Frankfurt, Germany
  E. Longitude    8 39  0.0,  Latitude  50  8 30.0,  Alt.  0m

       day    Time     P   Star  Sp  Mag  Mag    % Elon Sun  Moon   CA   PA  VA  AA
   y   m  d  h  m   s       No  D     v    r V  ill     Alt Alt Az   o    o   o   o
  18 Jan  5  8 26 55.4 D    1487SB7  1.4* 1.4s  85- 135   7 10 276 -84N 104  63  82
     R1487 = Regulus = alpha Leonis
  18 Feb  8  3 18 58.0 d    2223SK0  3.9  3.4   45-  84     17 142 -54S 140 164 127
     R2223 = gamma Librae
  18 Feb  8  4 27 59.6 R    2223SK0  3.9  3.4   45-  84     23 159  70S 264 278 251
   R2223 = gamma Librae
  18 Feb 23 13  1 21.4 D     669SG7  3.8* 3.3s  53+  93  28 25  95  58S 113 154 121
  18 Feb 23 13 18  2.7 D     671SA7  3.4* 3.3v  53+  93  26 28  98  19S 152 193 160
  18 Feb 23 13 30 29.4 r     671SA7  3.4* 3.3v  53+  93  26 29 101  -4S 175 216 183
  18 Feb 23 13 48 52.3 r     669SG7  3.8* 3.3s  53+  93  24 32 104 -43S 214 254 222
  18 Feb 23 16 50 41.4 D     692SK5  0.9* 0.1v  54+  95   0 55 156  61S 110 126 118
     R692 = Aldebaran = alpha Tauri
  18 Feb 23 17 52 24.1 R     692SK5  0.9* 0.1v  54+  95 -10 57 182 -48S 220 218 227
     R692 = Aldebaran = alpha Tauri
  18 Apr  8  2 13 48.7 d    2797SF2  2.9* 2.7S  52-  92      7 134 -84S  89 118  97
  18 Apr  8  3 32 16.2 R    2797SF2  2.9* 2.7S  51-  92     14 151  78N 275 295 284
  18 Jun 24 18  0  7.3 d    2223SK0  3.9  3.4   89+ 142  13 15 137  55N  74 101  61
  18 Jun 28 22 55 19.4 R    2779wK0  3.8  3.2   99- 172     17 164  65S 232 243 240
  18 Jul  2  1 49 29   m    3171cA7  3.7* 3.5v  87- 138 -11 23 170  -2S 161 168 182
  18 Jul 10  2 11  1   m     635cG8  3.7* 3.1s  13-  42 -10  8  75   0S 164 204 173
  18 Sep 18 17  5  5.2 d    2779wK0  3.8  3.2   67+ 109   4 15 157  82S  92 108 100
  18 Sep 18 18 30 21.7 r    2779wK0  3.8  3.2   67+ 110 -10 18 177 -86N 268 269 276
  18 Sep 21 20 47  7.8 D    3171cA7  3.7* 3.5v  90+ 143     23 176  23S 135 138 155
  18 Sep 21 21 22 48.5 r    3171cA7  3.7* 3.5v  90+ 143     23 185 -27S 185 181 205
  18 Nov 27 22 11 52   m    1310SK0  3.9  3.4   72- 117     18  83 -10S 185 228 169



Occultations of Planets by the Moon

The Moon regularly occults inner and outer planets. These occultations have no scientific value but show the dynamics of our Solar system impressively.

Upcoming Occultations in Europe in 2018 - 2023