The Blue Moon of 2019 was a notable celestial event that combined a supermoon, a blue moon, and a total lunar eclipse for observers in certain regions. This convergence of rare factors made January 2019 especially memorable for sky watchers and astronomy enthusiasts.
Because the second full moon in a calendar month coincided with a supermoon and a partial lunar eclipse, the event drew widespread media attention and public interest in lunar observation.
| Date | Type | Visibility Regions | Notable Features |
|---|---|---|---|
| 31 January 2019 | Super Blue Blood Moon | North America, Asia, Australia, Pacific | Total lunar eclipse, closest full moon of the year |
| 31 January 2019 | Blue Moon | Global (weather permitting) | Second full moon in January 2019 |
| 31 January 2019 | Supermoon | Global | Perigee full moon, up to 14% larger and 30% brighter |
| 31 January 2019 | Total Lunar Eclipse | Asia, Australia, Pacific, parts of North America | Moon appeared reddish during mid-eclipse |
Understanding the Super Blue Blood Moon
What Made This Moon a Supermoon
The Super Blue Blood Moon of 2019 was classified as a supermoon because the full moon occurred near lunar perigee, making it appear larger and brighter in the sky. This visual size increase can be as much as 14 percent compared to a micromoon.
Why It Was Also a Blue Moon
A blue moon is defined as the second full moon within a single calendar month, a fairly uncommon timing that gave the January 2019 full moon its blue designation. The moon did not actually appear blue in color, but the name highlighted the rarity of the double full moon event.
Global Visibility and Observation Conditions
Best Locations for Viewing the Total Lunar Eclipse
Observers across Asia, Australia, the Pacific islands, and parts of North America had front-row seats to the total lunar eclipse phase. In these regions, the super blue moon took on a reddish hue, often described as a blood moon by media and sky watchers.
Weather and Timing Considerations for North America
For many in North America, the eclipse occurred during the early morning hours of 31 January, with optimal viewing conditions favoring the western coast. Clear skies and low light pollution improved the ability to track the gradual dimming and reddening of the moon.
Scientific Explanation of the Lunar Eclipse
How Earth’s Shadow Created the Blood Moon Effect
During a total lunar eclipse, the Earth blocks direct sunlight from reaching the moon, casting a shadow known as the umbra. Rayleigh scattering of sunlight through Earth’s atmosphere bends the light and predominantly allows red wavelengths to illuminate the lunar surface.
Role of Atmospheric Conditions in Color and Clarity
Volcanic eruptions and large-scale dust or pollution can deepen the reddish tone of a lunar eclipse by filtering more blue light. The vivid coppery color observed in 2019 reflected relatively clear atmospheric conditions at the time of the event.
Photography and Public Engagement
Camera Settings and Equipment Recommendations
Photographers used long focal lengths, fast lenses, and higher ISO settings to capture details of the super blue blood moon. Smartphone cameras with telephoto attachments also produced impressive results when mounted on tripods for stability.
Social Media Impact and Public Interest in Lunar Events
Images and time-lapse videos of the eclipse circulated widely online, driving public curiosity about lunar cycles and eclipse predictions. This engagement helped raise awareness about basic astronomy concepts such as orbital mechanics and lunar phases.
Key Takeaways for Sky Watchers
- Note that blue moons are calendar events, not changes in the moon's appearance.
- Supermoons enhance brightness and size, making eclipses more dramatic.
- Plan lunar photography with tripod support and experiment with longer focal lengths.
- Check local weather forecasts and light pollution maps for optimal eclipse viewing.
- Use credible astronomy sources to track future super blue blood moon opportunities.
FAQ
Reader questions
Why was the full moon in January 2019 called a blue moon?
It earned the blue moon label because it was the second full moon to occur within the same calendar month, a timing pattern that happens about once every two to three years.
Did the moon actually look blue during the 2019 event?
No, the moon appeared reddish or coppery during the total lunar eclipse, while the term blue moon refers only to the calendrical occurrence of two full moons in one month.
What is a supermoon, and how was it relevant in 2019?
A supermoon is a full moon that occurs near lunar perigee, making it larger and brighter; in 2019, this amplified the visual impact of the already rare blue moon and lunar eclipse combination.
Where was the total lunar eclipse of 31 January 2019 best visible?
The total lunar eclipse was best viewed from Asia, Australia, the Pacific region, and portions of North America, with weather conditions playing a key role in local viewing success.