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KH Astronomy Logo

Astronomy Calculations

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Daylight Saving (Summer) Time defaults approximately so verify near its start & end

Common Input

Select Location or enter Latitude, Longitude & Time Zone. If required, change Date. Verify Daylight Saving. Calculation is automatic.
Location Latitude deg min sec
Date     Longitude deg min sec
Daylight Saving hr Time Zone 0° long hrs
 

NOAA Sunrise - Sunset

Web site NOAA Emblem Uses routines from Astronomical Algorithms by Jean Meeus
Local Time UTC (GMT) Local Time UTC (GMT)
Apparent Sunrise    Apparent Sunset   
Solar Noon Length of Day hrs : min
Equation of Time minutes Solar Declination degrees
 

Keith Burnett Sun & Moon

Web site
Uses routines from Astronomy on the Computer by Montenbruck & Pfleger
Local Time UTC (GMT) Local Time UTC (GMT)
Apparent Sunrise Apparent Sunset
Civil Twilight Begins Civil Twilight Ends
Apparent Moonrise Apparent Moonset
 

Peter Hayes Moon

Web site Moon phase Uses routines from Astronomical Algorithms by Jean Meeus
Local Time UTC (GMT) Local Time UTC (GMT)
Apparent Moonrise Apparent Moonset
Moon Phase degrees (at 12:00 UTC/GMT) % illuminated
 

Stargazing Moon Rise & Set

Web site MAS Logo Uses routines from Sky & Telescope, July 1989
Local Time UTC (GMT) Local Time UTC (GMT)
Apparent Moonrise Apparent Moonset
Azimuth at Moonrise degrees Azimuth at Moonset degrees
 

US Naval Observatory

Web site
Click button to display results from submitting data to USNO in new tab or window
Date
Latitude  north  south  deg  min Longitude  east  west  deg  min
Time Zone  hrs  E  W of UTC Place Name