# Sun Position Not Correct For Certain Days of the Year **URL:** \ **Category:** SketchUp\ **Created:** [October 31, 2016, 4:01pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006 "2016-10-31T16:01:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![dannyllim](https://avatars.discourse-cdn.com/v4/letter/d/8e8cbc/32.png) [@dannyllim](https://forums.sketchup.com/u/dannyllim)\ **Post date:** [October 31, 2016, 4:01pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/1 "2016-10-31T16:01:38Z")
I am studying the shadow casts by buildings throughout the year and I noted that during certain days of the year the sun is at the wrong position for location 14.5N, 121E and UTC+8:00. At this location, the sun should always be at the south of the building casting shadow to the north side. I noted that at 12:00NN of 4/29 the sun is above the building and no shadow is cast on the ground. Before this day, the sun is at the south side as it should be. After 4/29 the sun starts to move north of the building casting shadow to the south side ground. This occurs until 8/14 where the sun is again above the building. From this day onward, the sun moves to the south. I uploaded a pdf file of the screen captures showing the above shadow positions. [SunPosition.pdf](https://forums.sketchup.com/uploads/short-url/sutm9tfOCcPn2uOkk1cKZcoGGul.pdf) (597.1 KB) My question is if there is any adjustment I can do to correct this. Any advice or guidance is highly appreciated. Thanks. dannyllim ---
**Author:** ![Marc](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/marc/32/11407_2.png) [@Marc](https://forums.sketchup.com/u/Marc)\ **Post date:** [October 31, 2016, 4:09pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/2 "2016-10-31T16:09:54Z")
It’s been a while since I took celestial navigation, but isn’t 14.5N south of the Tropic of Cancer? So for a few months around the Summer Solstice the sun will be north of your location and will cast shadows to the south? M ---
**Author:** ![Anssi](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/anssi/32/105_2.png) [@Anssi](https://forums.sketchup.com/u/Anssi)\ **Post date:** [October 31, 2016, 5:12pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/3 "2016-10-31T17:12:23Z")
> [@Marc](#): > > Tropic of Cancer? Yep. Tropic of Cancer=23°26′13.6″ says Wikipedia. ---
**Author:** ![colin](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/colin/32/266703_2.png) [@colin](https://forums.sketchup.com/u/colin)\ **Post date:** [October 31, 2016, 6:09pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/4 "2016-10-31T18:09:40Z")
I made a movie, of looking straight up, with south on the left and north on the right. It shows that the sun is towards north from April 29th to August 14th. The recording is every day of 2018, and happens to show that you’ll get two solar eclipses that year. [https://forums.sketchup.com/uploads/short-url/xcx7uZyT1JkkSqLBLqVFroSD5Lr.mp4](https://forums.sketchup.com/uploads/short-url/xcx7uZyT1JkkSqLBLqVFroSD5Lr.mp4) ---
**Author:** ![Geo](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/geo/32/82_2.png) [@Geo](https://forums.sketchup.com/u/Geo)\ **Post date:** [November 1, 2016, 10:26am UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/5 "2016-11-01T10:26:50Z")
> [@dannyllim](#): > > 14.5N, 121E > At this location, the sun should always be at the south of the building casting shadow to the north side. You’ll find the United States Naval Observatory along with SketchUp do not agree with you. Visit USNO \> Data Services [http://www.usno.navy.mil/USNO/astronomical-applications/data-services](http://www.usno.navy.mil/USNO/astronomical-applications/data-services) Positions of Selected Celestial Objects \> Altitude and Azimuth of the Sun or Moon During One Day [http://aa.usno.navy.mil/data/docs/AltAz.php](http://aa.usno.navy.mil/data/docs/AltAz.php) [USNO\_Alt\_Az\_Table\_July\_1\_2016.pdf](https://forums.sketchup.com/uploads/short-url/h9ltogcBMqMo6F3qrePBbeof8LZ.pdf) (85.2 KB) ---
**Author:** ![dannyllim](https://avatars.discourse-cdn.com/v4/letter/d/8e8cbc/32.png) [@dannyllim](https://forums.sketchup.com/u/dannyllim)\ **Post date:** [November 2, 2016, 5:07pm UTC](https://forums.sketchup.com/t/sun-position-not-correct-for-certain-days-of-the-year/33006/6 "2016-11-02T17:07:23Z")
Thanks for correcting me. Appreciate the information provided by everyone who responded. dannyllim