The Moon set on January 31 2018 was part of a rare triple celestial event visible in many regions. For sky watchers, this evening disappearance of the lunar disk combined a supermoon, a blue moon, and a total lunar eclipse.
Below is a detailed snapshot of when and where this set occurred, plus the science and visibility conditions you would have seen that night.
| Event Feature | January 31 2018 | Typical Moonset | Notes |
|---|---|---|---|
| Date | 31 January 2018 | Varies by location | Super Blue Blood Moon day |
| Phase | Full Moon near perigee | Full or crescent | Full phase at 20:27 UTC |
| Eclipse Status | Total lunar eclipse in progress | None | Totality from 11:51 to 12:08 UTC |
| Moonset Time (mid latitudes) | Approx 07:00 local time | Daily around 50 minutes later | Set during daylight in high northern latitudes |
| Visibility Conditions | Western horizon in evening | Horizon direction varies | Weather and light pollution reduced clarity in places |
Celestial Mechanics Behind the Moonset
Moonset occurs when the Moon crosses the observer’s horizon from east to west, driven by Earth’s rotation. On January 31 2018, this daily motion happened while the full supermoon was also completing a partial eclipse, creating a dramatic evening scene.
The exact timing of moonset depends on your latitude, longitude, and the Moon’s declination. Mid latitude viewers in the Northern Hemisphere saw the Moon set a few hours after sunset while the eclipse was still underway.
Regional Visibility and Timing
Because Earth rotates, moonset times shift later each day by roughly 50 minutes. For the January 31 2018 event, favorable evening viewing was concentrated in the Americas and the Western Pacific. Observers in Europe and Africa mostly caught the setting near dawn or missed it entirely.
Clear skies and an unobstructed western horizon improved chances of watching the Moon slip away during the later stages of the total eclipse.
Scientific Observations and Public Impact
Scientists used this super blue blood moon to study atmospheric refraction and lunar surface temperature changes during eclipse totality. The combination of a close perigee and Earth’s shadow provided clean data for calibration of instruments.
News and social media coverage surged as the triple rarity energized public interest in astronomy. Planetariums and observatories reported record attendance, and many educational programs highlighted the science of eclipses and tides.
Photography and Observation Tips
Photographers aiming for the moonset on January 31 2018 focused on timing, framing, and exposure. Using a tripod, a telephoto lens, and manual settings helped capture the lunar disk as it descended through colored twilight skies.
- Plan your location with a clear western horizon and check elevation charts.
- Use apps or websites for precise moonset time at your coordinates.
- Experiment with exposure bracketing to preserve detail in the eclipse and city lights.
- Arrive early to set up and scout compositions before the Moon dropped low.
Looking Forward to Future Moon Events
Understanding when the Moon will set helps plan observations and photography, and it deepens appreciation for orbital mechanics. Tracking these patterns prepares you for the next rare celestial convergence.
FAQ
Reader questions
What celestial events coincided with the Moonset on January 31 2018?
The Moon set while a total lunar eclipse was in progress, making it a supermoon, a blue moon, and a blood moon at the same time.
Was the January 31 2018 moonset visible everywhere?
No, visibility was best in the Americas and Western Pacific, while much of Europe and Africa saw the Moon during daylight hours or missed the evening set.
How did photographers capture the Moon setting that night?
They used tripods, telephoto lenses, manual exposure, and timing with the eclipse to retain detail in both the moon and the darkened sky.
Why did the Moon appear larger and red during this event?
The supermoon made it look larger due to perigee, and Earth’s atmosphere scattered blue light during the eclipse, casting a reddish hue on the lunar surface.