2019/4/10 金星+ 海王星+ 水星
2020 /12/21 18點多 木合土星 很難得機會 .
美國應該可以拍 ..靠近時木星下去 仰角很低 ..
只有 下午 6點多還可看
科學家研究過 土星跟木星 http://www.bogan.ca/astro/occultations/occltlst.htm
period -1000 to 6000 did not find a single case where Jupiter and Saturn had a mutual occultation. He looked for close conjunctions and found the closest at 424 BC.
There will be a close approach of 6' arc of the two in 2020 and hence will give a telescopic view of the two together. The Date of the event is 21 December 2020, at 18 h UT.