Moon Phases Visible from ロンドン

From ロンドン at latitude 51.5°, 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, ロンドン's high-latitude latitude affects the moon's maximum altitude in the sky. The moon can reach up to 67.1° altitude when crossing the meridian near summer solstice, and only 9.9° near winter solstice. This seasonal variation determines how high the moon appears above ロンドン's horizon and affects lunar photography planning.

1675年以来グリニッジ王立天文台の本拠地であるロンドンは、本初子午線——地球全体の世界時を定義する経度0度線——の発祥の地です。地球上のすべてのタイムゾーンは、テムズ川を見下ろす丘の上のこの一点を基準に測定されており、ロンドンを文字通り世界の計時の中心地としています。

Moonrise & Moonset Times at ロンドン

The moon rises approximately 50 minutes later each day as seen from ロンドン. 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 ロンドン's latitude (51.5°), 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 ロンドン using real-time ephemeris data.

北緯51.5度に位置するロンドンでは、真夏と真冬の日照時間に8時間以上の極端な季節差があり、これが街のリズムを形作っています。6月の夏至には夕暮れが午後10時を過ぎても続き、12月の日中はわずか8時間の日照に縮まります——この幅は低緯度からの訪問者を常に驚かせます。

Moon Illumination & ロンドン's Dark-Sky Planning

For stargazing and astrophotography in ロンドン, 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 51.5° 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 ロンドン.

Lunar Data Accuracy for ロンドン

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for ロンドン using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from ロンドン's precise coordinates (51.5°, -0.1°) 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.