In 2018, skywatchers around the world had multiple opportunities to observe a supermoon, a full moon occurring near perigee that appears larger and brighter than an average full moon. These events generated significant public interest, photography activity, and widespread media coverage as people tracked each close approach of the Moon to Earth.
This guide presents the 2018 supermoon dates in a clear, practical format, explains what makes a supermoon scientifically notable, and offers guidance for planning observations and photography. Use the summary table and detailed sections below to quickly find the information most relevant to your location and viewing goals.
2018 Supermoon Summary Table
| Date | Full Moon Time (UTC) | Perigee Time (UTC) | Maximum Apparent Diameter | Notes |
|---|---|---|---|---|
| 1 January 2018 | 13:24 | 18:21 | ~33.5 arcminutes | Blue Moon supermoon, strong tides |
| 31 January 2018 | 13:27 | 04:56 | ~33.6 arcminutes | Total lunar eclipse visible in Asia and western Pacific |
| 9 February 2018 | 01:53 | 10:04 | ~33.5 arcminutes | Mid-February window for northern hemisphere observers |
| 1 March 2018 | 00:27 | 08:32 | ~33.5 arcminutes | Last supermoon of the early 2018 series |
Understanding Supermoon Mechanics
A supermoon occurs when the full moon phase coincides closely with lunar perigee, the point at which the Moon is nearest to Earth in its elliptical orbit. Because the Moon follows a slightly oval path, its distance from Earth varies during each month, and the brightness and apparent size can shift noticeably depending on whether perigee aligns with full moon or other phases.
The visual difference between a supermoon and a typical full moon is subtle but measurable, with the supermoon appearing up to about 14 percent larger and 30 percent brighter under ideal conditions. These changes are driven by geometry rather than any dramatic physical transformation, making careful observation and photography the best ways to appreciate the effect.
Best Observation Conditions
To make the most of 2018 supermoon events, choose observation times near moonrise or moonset, when the Moon is low over the horizon and optical effects can enhance the perception of size. Clear skies, low light pollution, and an unobstructed view of the horizon help viewers notice the increased brightness and subtle details along the lunar limb.
Light pollution has a significant impact on perceived supermoon quality, as a bright Moon near city lights can wash out faint surface features and reduce the sense of drama. Suburban and rural sites often provide better contrast for surface markings, while coastal locations can offer striking reflections on water during high tide.
Photography Techniques
Photographing a supermoon benefits from longer focal lengths, stable support, and manual camera settings that balance exposure, sharpness, and dynamic range. Using a telephoto lens, a sturdy tripod, and a low ISO setting helps capture detail in both the Moon and the surrounding landscape without excessive noise.
Including foreground elements such as trees, buildings, or landmarks can create a compelling sense of scale, while careful timing ensures the Moon appears at a desirable position in the frame. Planning with apps or ephemeris tools allows photographers to anticipate moonrise direction and avoid obstacles that might block the view at key moments.
Scientific and Cultural Context
The term supermoon is not a formal astronomical classification but rather a popular label for full moons that occur within a specific proximity of perigee. In 2018, the combination of multiple supermoons, eclipses, and Blue Moon events created a busy year that drew attention from casual observers and science communicators alike.
Cultural traditions around the world have long linked full moons to agriculture, festivals, and storytelling, and supermoon events often serve as accessible entry points for public interest in orbital mechanics and space science. Understanding the mechanics behind these events helps separate genuine astronomical phenomena from exaggerated claims sometimes found in media or online sources.
Planning Your 2018 Supermoon Experience
- Check local moonrise and moonset times to maximize visibility during the supermoon window.
- Select observation sites with low light pollution and clear sightlines toward the horizon.
- Use a tripod and appropriate camera settings to capture sharp, well-exposed images.
- Leverage photography and planning apps to anticipate lunar position and foreground alignment.
- Combine scientific curiosity with cultural context to deepen your appreciation of each event.
FAQ
Reader questions
When exactly were the supermoon dates in 2018?
The 2018 supermoon series included full moons on 1 January, 31 January, 9 February, and 1 March, with each event featuring the full phase occurring close to lunar perigee.
Did every supermoon in 2018 look the same size and brightness?
No, subtle differences in distance and timing meant that each supermoon had a slightly different apparent diameter and brightness, with the January and February events offering particularly favorable conditions for many observers.
Was the 31 January supermoon special for any reason beyond being a supermoon?
Yes, the 31 January supermoon coincided with a total lunar eclipse and was also a Blue Moon, making it a rare triple event that attracted widespread attention from both the public and media.
Is it safe to view a supermoon with the naked eye or through telescopes?
Yes, supermoons are safe to view with the naked eye, binoculars, or telescopes, though using protection for solar filters is necessary only during solar observations, not lunar viewing.