It is best to either perform ALL your Sync operations from Stellarium, or ALL from the Sky Chart in EQMac. Once the slew is complete, you can align the object in your scope and press CMD+2 in Stellarium to perform a Sync on the chosen object. You should see the scope location change in Stellarium as the slew sweeps across the sky. If you select an object and press CMD+1, your scope should begin slewing to that object. If you have your mount connected to EQMac, you should notice that Stellarium shows the current position. You can then close the configuration window. Make sure that the check box for “ Load on Startup” is enabled. Select the Plugins tab and choose Telescope Control from the list on the left. Next start up Stellarium and open the Configuration window. Be aware though, that this will overwrite any previous telescope configuration you may have made within Stellarium. Click the Configure Stellarium button and you are done. Type in a name for your telescope and leave the other settings alone. Open the EQMac Preferences window and select the Stellarium section.
To configure Stellarium, make sure you DO NOT have Stellarium running. For this reason, I have added a new section to the EQMac Preferences window to let you define your telescope and configure Stellarium automatically. Unfortunately, at least for me, the Stellarium plugin configuration interface doesn’t work very well making it difficult to define telescopes to be controlled.
#The stellarium software
Analemma ReferencesĪ really neat article on scienceblogs that talks about the analemma in depth.The EQMac software will listen on ports 10001, 10002, and 10003 for Slew, Sync, and Abort operations initiated from Stellarium. Use Command – M keyboard shortcut for that. The mount style will change the way the Earth moves on the screen. You can also try out the Equatorial and Azimuthal mount feature in Stellarium. You can use the Z key to turn on “Zenith grid” to see the exact degrees of change as the Sun travels on the Analemma path. In the Southern Hemisphere, the Analemma would be upside down – the big loop of the figure 8 on top. At the equator the analemma is laying on its side. This image, animation/visualization is correct for the Northern Hemisphere. The Sun hits the high point at summer solstice (June) and the low point at the winter solstice (December). Observe the Sun moving in a figure eight shape, tracing out the analemma over the course of a year. Time Controls by Key presses – time jumping: equals, minus, left and right bracketsĮach time the day or week jump keys are pressed the Sun will seem to move in the sky. Use the Left Bracket or Right Bracket keys to go week by week.
#The stellarium plus
Use the Plus (+) or Minus (-) keys to go day by day. We are going to do a Day by day time lapse. To see the Analemma we have to do some time travel. Stellarium screenshot – Sun at a good zoom level locked into the viewport. A good zoom level is where you can see a little bit of ground and the Sun is in view. Get to a good zoom level using the scroll function on the mouse or trackpad. Stellarium screenshot showing the Sun locked in the viewport. This will keep the Sun in the viewport as we do some time travel. Lock the Sun into the viewport using the Space bar. Time Controls by Key presses 8 to go to “now”, J, K, L to do Time Lapse Find the SunĬommand + F and type “sun” (with no quotes) into the window. Set the time to around 7:00am local time.
#The stellarium download
( Download it here if you don’t have it already). Here is a quick tutorial on time control. In this visualization we will be using the Time Control features of Stellarium. The analemma is easier to see when it is animated. The June weeks are at the top left, December weeks at the bottom right and April and September weeks are in the middle at the crossing of the figure 8. The pictures show every Sun position frozen in the sky each week at the same time of day: early in the morning. Stellarium can help you see sky patterns and practice Physical Astronomy.īy following this article you will be able to see the analemma moving – a figure 8 shaped path that the Sun follows yearly.Ībove is a composite image that shows the position of the Sun in the morning sky each week.
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