Moon Phases Visible from ポルト

From ポルト at latitude 41.2°, 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, ポルト's mid-latitude latitude affects the moon's maximum altitude in the sky. The moon can reach up to 77.4° altitude when crossing the meridian near summer solstice, and only 20.2° near winter solstice. This seasonal variation determines how high the moon appears above ポルト's horizon and affects lunar photography planning.

ポルトは2026年8月12日の皆既日食の経路の南半分に位置し、象徴的なドン・ルイス1世橋とドウロ川渓谷の上空で約1分45秒の皆既が続きます。ユネスコ世界遺産のリベイラ地区の狭い通りは、月の影が時速2,000km以上で大西洋から内陸へと駆け抜ける中、不気味な真昼の暗闇に包まれます。

Moonrise & Moonset Times at ポルト

The moon rises approximately 50 minutes later each day as seen from ポルト. 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 ポルト's latitude (41.2°), 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 ポルト using real-time ephemeris data.

北緯41.2度のポルトは大西洋の光に包まれています——海霧を通して濾過された名高い黄金色の午後の日差しは、何世紀にもわたって画家や写真家を魅了してきました。ドウロ川の河口に位置する西向きの街並みは、すべての日没が川と海、そして対岸のヴィラ・ノヴァ・デ・ガイアの段丘の丘に縁取られたスペクタクルとなることを意味します。

Moon Illumination & ポルト's Dark-Sky Planning

For stargazing and astrophotography in ポルト, 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 41.2° 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 ポルト.

Lunar Data Accuracy for ポルト

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for ポルト using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from ポルト's precise coordinates (41.2°, -8.6°) 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.