Moondogs New Zealand

Last updated on September 16, 2023

Moondogs: A Spectacular Atmospheric Phenomenon in New Zealand

Have you ever witnessed the breathtaking beauty of moondogs? These elusive optical phenomena, also known as paraselenae or lunar halos, create a stunning display in the night sky. Recently, an avid sky watcher named Stefan Krivan captured an extraordinary image of moondogs in New Zealand, offering a glimpse into their mesmerizing allure. Let's delve into the world of moondogs and explore the fascinating details behind this celestial spectacle.

The Enchanting Discovery of Moondogs

Stefan Krivan was patiently waiting for Mars to rise alongside the full Moon over the picturesque Manawatu ranges in North Island, New Zealand. As he gazed up at the sky, something caught his eye – two faint moondogs flanking the brilliant Moon. These celestial companions became even more prominent as darkness descended upon the landscape. To Stefan's delight, the moondogs occasionally revealed faint colors when the Moon disappeared behind wispy cumulus clouds. What made this sighting even more remarkable was the duration of these moondogs, which persisted for an astonishing three hours. This extended presence was quite unusual since moondogs are typically fleeting, lasting only a few minutes. Stefan's encounter with these luminous companions left an indelible impression on him, serving as a vivid reminder of the wonders of our natural world.

Unraveling the Mystery: The Science behind Moondogs

So, what exactly causes these captivating moondogs? The answer lies in hexagon plate-shaped ice crystals suspended within cirrus or cirrostratus clouds. When light from the Moon passes through these ice crystals, it undergoes refraction and reflection, resulting in the formation of a halo around the Moon. The angle at which the light is bent determines the size and shape of the halo. In the case of moondogs, the ice crystals are oriented horizontally, creating a distinct circle of light on either side of the Moon. This celestial phenomenon is similar to its daytime counterpart, sundogs, which appear alongside the Sun.

The Brilliance of Moondogs

Stefan Krivan described these moondogs as the brightest he had ever witnessed. Their luminosity was truly remarkable, especially when compared to the fleeting nature of typical moondog sightings. As the Moon went behind the low cumulus clouds, the moondogs occasionally exhibited faint colors, adding an ethereal touch to the already captivating display. This interplay of light and ice crystals resulted in a visual spectacle that Stefan will undoubtedly cherish for years to come.

Moondogs: A Worldwide Phenomenon

While Stefan's encounter with moondogs in New Zealand was truly exceptional, it is important to note that these atmospheric marvels can be observed in various parts of the world. Moondogs are not limited to specific geographic locations and can occur wherever the necessary atmospheric conditions are present. So, whether you find yourself in New Zealand, the United States, or any other part of the globe, keep your eyes peeled for these enchanting companions of the Moon.

Capturing Moondogs: Through the Lens and with Our Own Eyes

Stefan Krivan's stunning image of moondogs provides a glimpse into the magnificence of this atmospheric phenomenon. However, it is important to remember that experiencing moondogs firsthand can be equally awe-inspiring. Unlike long-exposure photographs, our eyes have the ability to perceive the true beauty and intricacies of these celestial displays. So, whenever you have the opportunity, take a moment to gaze up at the night sky and immerse yourself in the wonders that nature has to offer.

Conclusion: A Reminder of Nature's Splendor

Stefan Krivan's encounter with moondogs in New Zealand serves as a reminder of the extraordinary beauty that surrounds us. These captivating optical phenomena, caused by hexagon plate-shaped ice crystals, create a mesmerizing halo around the Moon. Stefan's sighting of unusually bright and long-lasting moondogs, accompanied by faint colors, was truly a sight to behold. As we continue to explore the mysteries of our world, let us never forget to appreciate the enchanting wonders that grace our skies. So, the next time you find yourself gazing at the Moon, keep an eye out for these celestial companions and let their splendor ignite your sense of wonder.

Moondogs & Mars, New Zealand ~ Imaged on 30th January at Manawatu, North Island by Stefan Krivan. ©Stefan Krivan, shown with permission.

"While waiting for Mars to rise with the full Moon over the nearby Manawatu ranges, I noticed two faint Moondogs on both sides of the bright Moon. Once it became dark, the Moondogs became a lot brighter and at times they showed some faint colors when the Moon went behind some low cumulus clouds. The two Moondogs lasted for around 3 hours, which was very amazing since the Sundogs & Moondogs I've seen only usually last for a few minutes. At times a lunar circumzenithal arc & upper tangent were visible above the Moon, but were quite faint. These Moondogs were caused by hexagon plate-shaped ice crystals in cirrus or cirrostratus clouds. They are probably the brightest Moondogs I've ever seen. This summer surprise was definitely something to remember."

Stefan's image nicely captures how we might hope to experience elusive moondogs through our own eyes rather than a long camera exposure. To Northern Hemisphere observers the sky is upside down. Mars is close to the Moon at 8 o'clock. Procyon is on the lunar 22° halo at 11 o'clock. The left-hand dog overlays Gemini.

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