Stellarium

Your daily movement of the Sun is incorrect. My Lat. is 34 South yet the sunrises and sets South of my Lat. Rise and Set should always be North of E and W .

Asked by Hans Frahm

When looking at the daily movement of the Sun on the Ecliptic ie. from Sunrise to Sunset on any particular day, I see that the Sun rises South of East and sets South of West. This is not possible for an observer whose Latitude is 34 South. The sun always rises and sets North of due East and West.
What went wrong? Am I doing something wrong?

Rgds

Hans Frahm

Question information

Language:
English Edit question
Status:
Solved
For:
Stellarium Edit question
Assignee:
No assignee Edit question
Solved by:
Matthew Gates
Solved:
Last query:
Last reply:
Revision history for this message
Alexander Wolf (alexwolf) said : 		#1

Why this not correct? For example, check solar azimuth on here site - http://www.spectralcalc.com/solar_calculator/solar_position.php

In North Hemisphere the sunset and sunrise not only south of the equators, and in South Hemisphere the sunrise and sunset not only north of the equators.

Revision history for this message
Hans Frahm (hfrahm) said : 		#2

Hi Alexander,

I do not agree with you yet. The maximum declination of the Sun is 23.5 degrees North or South of the Equator. If the Latitude of the observer is higher than that, the azimuth of the Sun will always be in the other direction to his latitude.
Example: If my latitude is 34 degrees South, the Sun will Always be North of me.
If my Latitude is 60 degrees North, the Sun will always be South of me.

If my latitude is 23.5 degrees South the Sun will rise at exactly EAST and set on exactly WEST on the 25th December. After the Winter Solstice the sun will move further to the North and never can it rise in a Southerly direction.

Yes? No?

Rgds

Hans Frahm

Revision history for this message
Best Matthew Gates (matthew-porpoisehead) said : 		#3

Two things to check:

1. That you set your user location in Stellarium. press F6 or use the location icon in the left toolbar, and set the location either by clicking on the map (somewhat approximate), searching for a nearly city, or putting in the coordinates. When you've done this, check the "use as default" to save this so that it is used the next time you run Stellarium.

2. Your system date is set to the correct time zone. Sometimes the clock is to local time, but without the correct the correct time zone. This means that although the clock on their desktop says the right time, programs like Stellarium which need to be able to work out the right UTC from the local clock get it wrong, and you'll get incorrect sunrise and sunset positions.

Revision history for this message
Hans Frahm (hfrahm) said : 		#4

Problem is solved thanks. I made a mistake.
But I have a problem with the font. Names and instructions have some peculiar characters.
What and where must I enable to correct this?

Rgds

HF

Revision history for this message
Matthew Gates (matthew-porpoisehead) said : 		#5

Can you attach/post a screenshot?

Revision history for this message
Matthew Gates (matthew-porpoisehead) said : 		#6

Also, which OS are you using?

Revision history for this message
Hans Frahm (hfrahm) said : 		#7

Hi,

I am using Windows XP Professional

Rgds

HF

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of Matthew Gates
Sent: Thursday, November 18, 2010 6:45 PM
To: <email address hidden>
Subject: Re: [Question #134516]: Your daily movement of the Sun is incorrect. My Lat. is 34 South yet the sunrises and sets South of my Lat. Rise and Set should always be North of E and W .

Your question #134516 on Stellarium changed:
https://answers.launchpad.net/stellarium/+question/134516

Matthew Gates posted a new comment:
Also, which OS are you using?

--
You received this question notification because you are a direct
subscriber of the question.

Revision history for this message
Hans Frahm (hfrahm) said : 		#8

Hi Matthew,
I loaded up the program to take a screenshot and discover everything is working perfectly!
Writing/font is as it should be. Now I am left with no queries :-)
I would just like to thank you for your quick response to my issues.

Rgds

Hans Frahm

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of Matthew Gates
Sent: Thursday, November 18, 2010 6:30 PM
To: <email address hidden>
Subject: Re: [Question #134516]: Your daily movement of the Sun is incorrect. My Lat. is 34 South yet the sunrises and sets South of my Lat. Rise and Set should always be North of E and W .

Your question #134516 on Stellarium changed:
https://answers.launchpad.net/stellarium/+question/134516

Matthew Gates posted a new comment:
Can you attach/post a screenshot?

--
You received this question notification because you are a direct
subscriber of the question.