Occultation of Saturn by Jupiter are very rare events to be seen from Earth. Their average frequency is about one in 4000 years, and our present epoch is particularly "empty" of them. None has ever happened during historical times and the next one will be in y 7541. But if mankind will not be extinct (and I won't bet ten cents on that) people will have the extraordinary opportunity to see two such occultations in the same year! Something which is probably not going to happen again in a million years or so!... Below is a list of the 42 occultations occurring between 80000 BC and 80000 AD, sorted in descending order. BC dates are in the Julian calendar. RA and Dec are referred to the standard equinox of J2000. Error-checking using alternative models and/or starting conditions indicate that all the predictions are reliable (just allowing for some small time drift). Predictions extending outside the time span of +/- 80 millennia from the present epoch might not be reliable and are not given. -------------------------------------------------------------------------------- Date TDT Dm (ø) Dl RA (ø) Dec r1 r2 p (ø) e tm(s) 78300/07/30 01:39:38 0.00340 0.00712 123.94 19.93 5.65 10.15 170 41 11358 74944/04/18 04:01:15 0.00451 0.00691 137.90 16.87 5.80 10.56 344 26 9928 70852/06/23 02:12:13 0.00193 0.00731 174.38 3.85 5.44 10.20 339 57 12699 57089/09/10 08:56:29 0.00232 0.00718 90.03 23.09 5.59 10.11 360 45 11671 48213/01/17 17:53:09 0.00041 0.00688 335.35 -11.49 5.80 10.72 22 52 12445 44062/08/22 18:28:34 0.00524 0.00723 358.11 -2.69 5.56 9.96 204 59 14466 42573/08/30 23:32:08 0.00672 0.00871 191.48 -3.35 4.49 8.98 159 134 95528 41500/10/24 16:14:05 0.00299 0.00674 19.67 6.53 6.11 10.08 23 12 11358 37628/05/13 19:21:58 0.00049 0.00686 227.85 -16.51 5.81 10.81 162 56 12935 36774/09/25 15:02:14 0.00261 0.00880 228.39 -16.58 4.37 9.33 343 162 29910 30121/11/28 03:35:08 0.00550 0.00688 278.31 -22.91 5.93 10.10 181 55 15048 23350/01/18 03:28:51 0.00524 0.00679 335.40 -11.54 6.07 10.00 19 33 12549 21303/11/06 13:26:31 0.00258 0.00903 167.01 7.19 4.28 8.92 158 156 34032 13738/02/11 02:45:18 0.00020 0.00687 215.84 -12.79 5.99 9.92 342 58 16678 13340/09/19 21:22:21 0.00005 0.00687 41.18 14.48 5.83 10.61 17 18 9511 8674/02/27 09:04:29 0.00322 0.00645 255.86 -22.04 6.35 10.67 174 12 11111 7541/06/18 21:21:31 0.00068 0.00758 83.39 22.87 5.30 9.56 183 71 17125 7541/02/17 17:14:56 0.00774 0.00954 87.02 22.84 4.07 8.36 181 163 31772 -6856/06/04 04:04:52 0.00177 0.00671 187.71 -1.57 5.98 10.82 335 48 12385 -10610/11/29 10:32:34 0.00321 0.00728 31.35 11.09 5.65 9.37 23 50 14721 -14879/04/14 10:33:19 0.00131 0.00748 71.29 21.61 5.40 9.54 8 66 16455 -19089/03/30 00:44:06 0.00191 0.00700 101.78 23.06 5.71 10.48 176 49 12082 -22267/07/02 02:27:00 0.00536 0.00841 142.47 15.29 4.60 9.56 181 126 237410 -22445/01/29 16:26:28 0.00086 0.00649 118.24 21.53 6.20 11.11 171 4 9695 -31144/11/01 23:59:26 0.00562 0.00744 18.60 6.31 5.33 10.09 24 61 13239 -31600/01/29 09:13:30 0.00104 0.00643 184.19 0.27 6.44 10.43 337 14 12016 -40755/04/21 05:10:30 0.00213 0.00692 269.65 -23.16 5.82 10.40 357 42 11515 -44450/11/22 21:07:27 0.00326 0.00708 123.14 20.69 5.79 9.71 169 64 17878 -47130/06/29 15:13:11 0.00321 0.00690 115.23 21.27 5.96 9.87 352 56 16272 -48262/02/19 08:44:03 0.00364 0.00682 313.36 -18.09 5.90 10.59 194 12 9598 -53842/07/20 08:19:10 0.00479 0.00675 168.40 6.29 5.96 10.71 159 48 12464 -55769/05/03 18:06:43 0.00346 0.00696 19.44 6.20 5.93 9.72 22 35 12990 -60952/09/11 23:15:12 0.00411 0.00926 44.13 15.46 4.26 8.21 13 173 29763 -61171/09/27 08:42:33 0.00400 0.00662 231.25 -17.20 6.12 10.72 165 3 9888 -61230/03/17 21:58:35 0.00629 0.00931 224.29 -15.52 4.14 8.80 347 177 28923 -62600/06/21 00:58:38 0.00374 0.00737 70.28 21.06 5.46 9.79 11 73 18748 -66015/02/26 00:54:54 0.00635 0.00655 82.44 22.58 6.16 10.93 4 29 10886 -67148/09/30 23:42:15 0.00330 0.00681 277.20 -22.86 6.09 9.85 181 2 11542 -68061/07/18 07:34:46 0.00291 0.00750 271.49 -23.09 5.45 9.22 359 63 16550 -69253/07/05 23:58:40 0.00317 0.00740 120.57 20.66 5.32 10.34 352 85 21496 -71755/05/02 17:48:23 0.00163 0.00645 134.58 17.73 6.25 11.10 165 22 10369 -78248/04/29 10:05:35 0.00595 0.00934 349.25 -6.28 4.12 8.80 25 153 35246 ---------------------------------------------------------------------------------------------