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Is it possible to observe just one of the four Galilean (or Jovian) satellites without telescopes or binoculars? I would say: yes, when the bright orb of Jupiter and three of its Galilean satellites are hidden behind the corner of a large building. Perhaps interesting to make photographs of such appearances. A lunar occultation of Jupiter and its satellites (at the moon's nocturnal limb) is a rather quick happening to perform the above described experiment. The corner of a large (unilluminated) building could be used to create a "continuous" occultation. One has to "shift" the head a little bit to the right or to the left to see the bright Jupiter or just one of its satellites. |
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| I guess the only question left is if you'll have enough precision of movement to only have the moon, without Jupiter |
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| The best candidate to perform such an experiment would be Callisto, aka IV (the Galilean moon with the largest distance from Jupiter). While one eye is looking at Callisto, the other eye is looking at the bright orb of Jupiter! It is a matter of only a few inches, or centimeters. If the corner of the building would be located at, say, only ten or so meters away, the apparent distance between Jupiter and Callisto would be just a few millimeters. |
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Well, lemme know when you figure it out irl  |
