Table of Contents
What is the Subsolar point on March 21?
March 20 or 21 is the vernal (or spring) equinox for the Northern Hemisphere, and the subsolar point is heading north, on its way to the Tropic of Cancer.
What is the noon sun angle at the Arctic Circle on the March equinox?
The sun rises at the North Pole at noon to the horizon on the March equinox and the North Pole remains light until the September equinox. Arctic Circle: Experiences 12 hours of daylight and 12 hours of darkness. The sun is 66.5 off the zenith and low in the sky at 23.5 degrees above the horizon.
What is the declination of the sun on March 20 and September 22?
zero
The declination is zero at the equinoxes (March 22 and September 22), positive during the northern hemisphere summer and negative during the northern hemisphere winter.
What is the angle of the sun at summer solstice?
At the time of the summer or winter solstices, the Sun is 23.44° degrees above or below the horizon, respectively, irrespective of time of day.
Where is the subsolar point on September 22?
On September 22nd, The subsolar point is on the Equator.
What is the noon altitude of the Sun on June 21?
On June 21, the Sun is 23° N of the celestial equator, so it will be 23° away from the zenith at noon. The altitude above the horizon will be 23° less than the altitude of the zenith (90°), so it is 90° – 23° = 67° above the horizon.
What is the angle of the sun on September 21?
In Nashville (northern latitude 36 degrees), the height of the Sun above the southern horizon at midday on December 21 is 90-36-23.5 = 30.5 degrees; on March 21 (vernal equinox) and September 21 (autumnal equinox) the height above the southern horizon reaches 54 degrees; on June 21 (summer solstice) it reaches 77 …
What is the solar angle on March 21st at the equator?
0º
During an equinox, March 21 or September 22, the solar declination (referred to as declination from here on) is 0º. Recall from Obliquity and Earth Illumination that the Sun was directly overhead at local noon for someone standing on the Equator during an equinox.
How to calculate the noon sun’s zenith angle?
Noon Sun Angle = 90 – Zenith Angle. Zenith Angle = latitude where you are at ± subsolar point If the subsolar point and your latitude are in the same hemisphere, subtract. If the subsolar point and your latitude are in different hemispheres, add.
When is the Sun at its highest angle?
The amount of power a solar tracker uses in order to track the sun also negates much of its benefits. The sun is at its highest at solar noon each day (this occurs exactly half way between sunrise and sunset) and this calculator shows the angle at that time of day.
What is the sun angle at the winter solstice?
• 23.5°S on the winter solstice (note: degrees For example, if you were standing at 45ºN latitude, the noon Sun angle at summer solstice would be: 45° N – 23.5° N = 21.5°90° – 21.5° = 68.5° is the noon Sun angle Find these Sun angles:Noon Sun angle at equinoxes.
When does the sun rise and set in the southern sky?
By the September equinox, its path is again along the celestial equator. The southward drift then continues until the December solstice (usually December 21), when the sun rises considerably south of due east and sets considerably south of due west. For mid-northern observers, the noon sun is quite low in the southern sky.