Golden Hour Calculator
根据您的位置和日期查找黄金时段和蓝调时段摄影窗口。
关于此工具
黄金时刻是日出后不久和日落前不久太阳低悬的短暂时段，柔和温暖的光线将万物笼罩其中；而蓝色时刻则是日出前和日落后更深的暮光时分，天空被均匀而清冷的蓝色调填满。这两个时段都深受摄影师珍视，因为它们能拍出正午强光无法企及的柔美且富有氛围的影像。本计算器运用天文公式，精确推算出任意日期和地点这些时段的开始与结束时刻。
使用时只需输入日期和所在位置，工具便会显示日出和日落前后黄金时刻与蓝色时刻的起止时间。它专为希望将拍摄精确规划到分钟、并在光线最佳时抵达现场的摄影师、视频创作者和旅行者而设计。
请记住，这些时刻会随季节和纬度明显变化，因此请务必针对你的确切日期查询数据，而不要依赖粗略估计。所有计算均在你的浏览器本地完成，位置数据绝不会离开你的设备。
常见问题
代码实现
import math
from datetime import datetime, timedelta, timezone
def sun_times(lat: float, lon: float, date: datetime) -> dict:
"""Calculate sunrise, sunset and golden hour times."""
# Day of year
N = date.timetuple().tm_yday
# Mean longitude and anomaly
L = (280.460 + 0.9856474 * N) % 360
g = math.radians((357.528 + 0.9856003 * N) % 360)
# Ecliptic longitude
lam = math.radians(L + 1.915 * math.sin(g) + 0.020 * math.sin(2 * g))
# Declination
decl = math.asin(math.sin(math.radians(23.439)) * math.sin(lam))
# Hour angle for sunrise/sunset (sun altitude = -0.833°)
cos_ha = (math.sin(math.radians(-0.833)) - math.sin(math.radians(lat)) * math.sin(decl)) / (math.cos(math.radians(lat)) * math.cos(decl))
if abs(cos_ha) > 1:
return {"error": "Midnight sun or polar night"}
ha = math.degrees(math.acos(cos_ha))
# Equation of time correction (simplified)
B = math.radians(360 / 365 * (N - 81))
eot = 9.87 * math.sin(2 * B) - 7.53 * math.cos(B) - 1.5 * math.sin(B)
# Solar noon in minutes from midnight UTC
solar_noon = 720 - 4 * lon - eot
sunrise_min = solar_noon - 4 * ha
sunset_min = solar_noon + 4 * ha
# Golden hour bounds: sun at 6° above horizon
cos_gh = (math.sin(math.radians(6)) - math.sin(math.radians(lat)) * math.sin(decl)) / (math.cos(math.radians(lat)) * math.cos(decl))
gh_ha = math.degrees(math.acos(max(-1, min(1, cos_gh))))
golden_end_morn = solar_noon - 4 * gh_ha
golden_start_eve = solar_noon + 4 * gh_ha
def mins_to_str(m):
h, mn = divmod(int(m), 60)
return f"{h:02d}:{mn:02d}"
return {
"sunrise": mins_to_str(sunrise_min),
"golden_hour_morning_end": mins_to_str(golden_end_morn),
"solar_noon": mins_to_str(solar_noon),
"golden_hour_evening_start": mins_to_str(golden_start_eve),
"sunset": mins_to_str(sunset_min),
}
# New York City
result = sun_times(40.7128, -74.0060, datetime(2024, 6, 21))
for k, v in result.items():
print(f"{k}: {v}")Comments & Feedback
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