Moon Phases Visible from リスボン

From リスボン at latitude 38.7°, 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, リスボン's mid-latitude latitude affects the moon's maximum altitude in the sky. The moon can reach up to 79.9° altitude when crossing the meridian near summer solstice, and only 22.7° near winter solstice. This seasonal variation determines how high the moon appears above リスボン's horizon and affects lunar photography planning.

リスボンは2026年8月12日の皆既日食の経路の南端近くに位置します。市内中心部では深い部分日食（約95%）が見られますが、北へ車で30分、カルダス・ダ・ライーニャやリオ・マイオールといった町まで行けば皆既を体験できます。象徴的な路面電車の路線で不滅のものとなった7つの丘は、三日月形の太陽がテージョ川の河口に歪んだ影を落とすのを目にするでしょう。

Moonrise & Moonset Times at リスボン

The moon rises approximately 50 minutes later each day as seen from リスボン. 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 リスボン's latitude (38.7°), 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 リスボン using real-time ephemeris data.

北緯38.7度、ヨーロッパ大陸最西端に位置するリスボンは、年間2,800時間以上の日照を享受し、ヨーロッパでも最高水準です。西向きの大西洋岸に面したこの街では、海に沈む夕日が日常の儀式であり、大陸ヨーロッパ最西端のロカ岬までわずか40km、遮るもののない太陽の地平線が広がります。

Moon Illumination & リスボン's Dark-Sky Planning

For stargazing and astrophotography in リスボン, 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 38.7° 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 リスボン.

Lunar Data Accuracy for リスボン

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for リスボン using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from リスボン's precise coordinates (38.7°, -9.1°) 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.