1818 Jupiter and Venus Occultation

January 3, 21:51 UT

The 1818 occultation occured when Venus and Jupiter were at an elongation 16 west of the Sun (morning stars).
Did anyone see it before sunrise on Jan 3?
Several factors reduce the probability that very many observers saw this event.
If anyone with a good telescope was able to see it, the view would as shown in the image below.
Middle Occultation of Venus by Jupiter, 1818, January 3, 21:53 UT

• The observer should be in the northern hemisphere to see Venus completely occult part of Jupiter's disk. (latitude > 45^o) The map below show the area of contact as in the green. The areas in blue will see only a near pass.
• The planets are at declination -23^o (near the winter solstice point)
• The maximum occultation occurs at 21:53 UT and the Sun rises at 8:03 local time
• The ideal longitude is about E 145^o for the event to occur just before Sunrise.
  This location is east of the northern most island of Japan (Hokaido) and is along the western edge of the area highlighted in green.
• The planets are only 9^o above the horizon at Sunrise at 45^o N.

Only observers in a remote island of Japan were likely to see the occultation if they made a very special effort to look for it in the bright morning twilight.