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 GeoAstro Applets |
 Astronomy |
 Chaos Game |
 Java |
 Miscel- laneous |
 Physics Quiz |
Cone
Sundial
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Enter latitude in decimal degrees (southern negative), enter longitude in decimal
degrees (western negative), the hit the button "Apply
input". |
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you may use the keys "h", "d", "m" to increase the hour, date, or month, |
| The gnomon (length L)
of this sundial is horizontal and pointing to the south.
The x-coordinate is measured from the origin O to the
right along the upper circle, and y along the lateral
surface of the cone. The (horizontal) declination lines are drawn for 0° (black), +/- 4°, +/- 8°, +/- 12°, +/- 16°, +/- 20° (gray), and +/- 23.44° (red/blue). Click into the applet area to shift the drawing up or down, and use the "Details" options for scaling. |
| Declination (°) |
Dates |
| -23.44 | Dec
21 |
| -20 | Nov
21, Jan 20 |
| -16 | Nov
06, Feb 05 |
| -12 | Oct
25, Feb 17 |
| -8 | Oct
13, Feb 28 |
| -4 | Oct
03, Mar 10 |
| 0 | Sep 23, Mar 21 |
| 4 | Sep 12, Mar 30 |
| 8 | Sep 02, Apr 10 |
| 12 | Aug 21, Apr 21 |
| 16 | Aug 08, May 04 |
| 20 | Jul 23, May 20 |
| 23.44 | Jun 21 |
Sundial (2α=90°) at
51.62°N 7.79°E on January 20 at 11:00 standard time
More of my sundial applets ...
Updated:
20.10.2023
©
2010-2023 J. Giesen
