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This weekend, astronomy enthusiasts have a spectacular opportunity to observe the waning gibbous moon as it crosses in front of the famous Pleiades star cluster, also known as the Seven Sisters. This celestial event, occurring on Sunday, September 22, is part of a series of moon-pleiades interactions that will unfold over the next few years.
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What to Expect on September 22
During the early morning hours of September 22, skywatchers in much of the western United States will witness a captivating event known as an occultation. This phenomenon occurs when the moon passes in front of a celestial object, obscuring it from view. As the moon, illuminated at approximately 75%, moves across the night sky, it will temporarily hide several prominent stars within the Pleiades cluster.
Viewing the Pleiades
The Pleiades star cluster, located in the constellation Taurus, can be spotted low in the east-northeast sky around 10 p.m. local daylight time. By 4:30 a.m., it will be nearly overhead, making for an excellent viewing opportunity.
The Pleiades: A Storied Star Cluster
Few celestial patterns are as recognizable as the Pleiades. This tight-knit group of stars has captivated stargazers for centuries. To the naked eye, it appears as a shimmering cloud of light. However, upon closer inspection, you can identify six or seven stars, with some exceptional conditions revealing even more.
Key Stars in the Pleiades
The brightest star in the Pleiades is Alcyone, surrounded by Maia, Asterope I and II, Taygeta, Celaeno, Electra, and Merope, which is uniquely surrounded by a beautiful blue reflection nebula. The stars Atlas and Pleione represent the parents of the Seven Sisters, enriching the mythology surrounding this iconic cluster.
The Occultation: How to Observe
On the morning of September 22, the moon will obscure several bright members of the Pleiades cluster. Due to the moon’s waning gibbous phase, the stars will disappear behind its bright edge. Observers will need a telescope to see them vanish and may only require binoculars to witness their reappearance from behind the moon's dark side.
Optimal Viewing Locations
For those in the eastern and central United States, visibility may be affected by sunrise. The stars will begin to obscure as dawn approaches, making it increasingly difficult to see them. In contrast, observers in the Mountain Time Zone will have a better chance of viewing the entire event in darkness, while those in the Pacific Time Zone will enjoy the entire occultation under a dark sky.
Example Viewing Times
For instance, in Chicago, Electra will disappear at around 5:01 a.m. CDT, reappearing at 5:54 a.m. In Denver, however, Electra will vanish at 3:43 a.m. MDT and reappear at 4:13 a.m., both in dark sky conditions.
Using Telescopes and Binoculars
If you're looking to enhance your viewing experience, consider using a telescope or binoculars. The Celestron StarSense Explorer 130 AZ is highly recommended for beginners interested in astronomy. For those wanting to capture stunning images, check out our guides on the best cameras and lenses for astrophotography.
Preparing for the Event
Make sure to check your local weather conditions to ensure clear skies for the best viewing experience. Whether you’re a seasoned astronomer or a casual skywatcher, this event is not to be missed.
Engage with the Night Sky
This weekend’s occultation offers a wonderful chance to appreciate the beauty of the night sky. Be sure to take a moment to observe the moon and the stars as they interact in this rare celestial dance.
Conclusion
The upcoming occultation of the Pleiades by the moon on September 22 is a remarkable event that invites all skywatchers to engage with the wonders of the universe. As the moon obscures these iconic stars, you’ll not only witness a stunning display but also gain a deeper appreciation for the dynamics of our night sky.
Stay Updated on Astronomical Events
For those interested in more celestial happenings, don't forget to check out our night sky calendar and subscribe for updates on future astronomical events. Share your experiences and photographs with the community to inspire others in their exploration of the cosmos.
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Feel free to reach out if you have any questions or need more information about this event!
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