Moon Phases Visible from レイキャビク

From レイキャビク at latitude 64.1°, the moon's appearance follows the same 29.53-day synodic cycle visible worldwide — all 8 phases from New Moon through Full Moon and back. However, レイキャビク's polar latitude affects the moon's maximum altitude in the sky. The moon can reach up to 54.5° altitude when crossing the meridian near summer solstice, and only -2.7° near winter solstice. This seasonal variation determines how high the moon appears above レイキャビク's horizon and affects lunar photography planning.

レイキャビクは2026年8月12日の皆既日食の皆既帯の真っ只中に位置します——中心線上にあるわずか2つの首都（グリーンランドのヌークと共に）の一つです。北緯64.1度では、この都市の極端な季節的薄明により、食の太陽はUTC約17:30に低く空に懸かり、アイスランドの火山景観を背景に永遠の夏の黄昏の中で日食を撮影する貴重な機会となります。

Moonrise & Moonset Times at レイキャビク

The moon rises approximately 50 minutes later each day as seen from レイキャビク. This daily delay occurs because the moon orbits Earth eastward at about 1 km/s, moving roughly 13° per day against the background stars. At レイキャビク's latitude (64.1°), the moon's rise and set positions along the horizon shift seasonally — rising further north in summer and further south in winter. MoonSync calculates exact moonrise and moonset times for レイキャビク using real-time ephemeris data.

北緯64.1度のレイキャビクは世界最北の首都であり、5月下旬から8月上旬まで白夜を経験し、6月の夏至前後には市民薄明が一晩中続きます。この極端な緯度は、地球上で最も長い夏のゴールデンアワーを生み出します——太陽が完全に沈むことなく地平線をかすめる中、最大3時間にわたる柔らかな琥珀色の光が続きます。

Moon Illumination & レイキャビク's Dark-Sky Planning

For stargazing and astrophotography in レイキャビク, moon illumination percentage is the critical number. A Full Moon (100% illuminated) washes out all but the brightest stars and makes deep-sky observation nearly impossible. The 7 days around New Moon (0-15% illumination) provide the best dark-sky window. At 64.1° latitude, combine moon phase with the Twilight Calculator to find nights when both astronomical darkness and minimal moonlight coincide — these 'astrophotographer's golden hours' occur roughly once per month at レイキャビク.

Lunar Data Accuracy for レイキャビク

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for レイキャビク using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from レイキャビク's precise coordinates (64.1°, -21.9°) and corrected for atmospheric refraction. The Keplerian orbital model used achieves timing accuracy of approximately ±30 minutes over a synodic month. For sub-minute lunar event timing, consult the USNO Phases of the Moon data service.