The 2020 Venus conjunction Pleiades celestial phenomenon will appear in April, but on what date will it appear? Where is the best place to watch it when it appears? How can you take good photos? So let’s answer them one by one based on the knowledge of constellations!
When will Venus and the Pleiades appear in April: April 3, 2020. During the last close encounter (April 3, 2012), the light of Venus shone in the Pleiades star cluster. This peculiar phenomenon will appear exactly eight years later, on April 3, 2020. On April 3, Venus will move near the Pleiades star cluster, forming a celestial phenomenon of Venus and the Pleiades star cluster. The Pleiades is an open star cluster. It is a star cluster composed of more than 1,000 stars. Because it is located exactly in the Pleiades among the 28 stars in the Chinese (traditional) constellation, we call it the Pleiades. We usually see six to seven stars in the Pleiades cluster with the naked eye. The brightest star among them is about magnitude 2.85. Compared with Venus on April 3, its brightness is 1,000 times dimmer. Therefore, when Venus joins the Pleiades star cluster, it is estimated that people will not be able to see the Pleiades star cluster with the naked eye. If you want to appreciate this celestial phenomenon, you will at least need binoculars to observe it.
Where to see the conjunction of Venus and the Pleiades? Visible from most areas of the Earth, Venus will have a spectacular conjunction with the Pleiades star cluster. From North America the planet will pass just south of Alcyone, the cluster's brightest star. Stargazers in the Eastern Hemisphere will see it moving within 11 degrees of fourth-magnitude Merope.
How to Photograph Although you can carefully hold your phone and photograph Venus and the brighter Pleiades star cluster in the early evening, the scale of the image will be very small. Unfortunately, the results after upscaling are also unsatisfactory, as the resulting images are often grainy and of poor quality. But you can also mount a pair of binoculars on a tripod, hold your phone's camera against the rubber goggles of one of the eyepieces, keep it as still as possible, and press the capture button. Exposure times will vary depending on the time of day - shorter at dusk and longer after dark. For starters, set the ISO to 800 and the exposure time between 2 and 6 seconds, check the screen and adjust the exposure as needed to get the best image.
Focal length is critical when using a digital camera. With the shot set to manual mode, press the Live View button to preview your work on the background screen. Point the camera at the Moon or Venus, press the magnification button to five or ten times, and focus the image manually. And DSLR camera owners have greater flexibility, offering higher resolution than most cell phones. You can use a medium-wide-angle lens such as 35mm to compose a scene, or use a telephoto lens for close-up shots.
To avoid star trails, use a higher sensitivity and a shorter exposure. Experienced stargazers follow the "400 Rule," which is a stricter interpretation of the "500 Rule." Divide 350 by the focal length of your lens to determine the longest exposure you can get in seconds before the star starts moving. For example: the focal length is 35 mm, which means the maximum exposure is 11 seconds, and the focal length is 200 mm, which means the maximum exposure is 2 seconds. A wide-angle lens allows for lower sensitivity (less grain and noise); a long lens requires high sensitivity to capture images in a short time.
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