Before I describe the gas giant, I will explain a bit about the meaning of the word opposition. Opposition is when the two celestial bodies are exactly opposite. In this case, the night side of the Earth is opposite to the day side of Jupiter (external planets are already physically unable to see the night side of our planet). The distance of the Jupiter has diminished and its apparent diameter has increased proportionately so it is not difficult to capture. You can see it almost all night, due to its deleting around midnight. This year's opposition (with Jupiter once a year) took place on May 9, 2018, so my shot was taken ten days later, but that's not a significant delay.
The largest planet in the solar system has no solid surface. Jupiter is a gas planet with a solid core, a liquid metallic shell, and an atmosphere of hydrogen, helium and methane. It rotates around its own axis in just 9 hours 55 minutes. Even in small binoculars, it offers stunning visuals. Galileo Galilei observed the orbits of four large moons, attempting to refute the geocentric worldview.
When someone talks about Jupiter in a conversation, sooner or later everyone imagines the largest planet in the solar system. Not too hard to imagine: two brownish-reddish bands that surround the Jupiter equator. The southern lane is different from the northern one with a patch. The patch is not small, since its size is approximately the diameter of the Earth. Due to its size it is already noticeable with medium telescopes.
The patch also has a name, and once it has been given, we may think that it is something that is permanent and long-standing. Indeed! The oval-shaped phenomenon known as the Great Red Spot in professional circles is a hundreds of years old anticyclone. Its size and position fluctuate. It will probably rise a few kilometers higher than the surrounding clouds. The sad news is that this feature may disappear completely from Jupiter, even in our lives, as the size of the patch is rapidly decreasing, according to Hubble.
Compared to my capture with Dobsonian reflector in 2016, this is much clearer and more detailed, even though the reflector is not specifically optimized for planetary observation.
R.A. 14 h 58 m 33 s Dec. -15° 38′ 15″
660 million km
19/05/2018 20:59 UT
Tápióbicske, Pest, Hungary
ZWO ASI 120 MC (with FireCapture)
Sky-Watcher 150/750 mm Newtonian reflector
Sky-Watcher NEQ-5 Pro GoTo
5500 frame (best 15%)
AutoStakkert2!, RegiStax6, Adobe Lightroom, Adobe Photoshop