The only other thing you might want to change is the “define a radius”.
Epoch and Equinox do not need to be changed. Under “define the input” below the query box, select ICRS from the drop down list. Now copy and paste this into the SIMBAD query box. There must be a sign (+ or -) before the DE. The first three numbers are the RA, the next three are the DE. We need to format this for the SIMBAD query, which is done by simply removing the h/m/s (hour/minute/second) and degree/minute/second marks, leaving just the numbers and the signs, like so: I wrote a blurb about astronomical coordinates, which you can look up here if you want to know what RA/DE (J2000) means. We’re interested in the RA/DE (J2000) coordinates. For the star selected above, it looks like this: While you have the star selected in Stellarium, press CTRL-C to copy that star’s information to the clipboard, then paste it into a text editor. You can just read off the coordinates from Stellarium, but I prefer to do the following. Now we need to enter coordinates for the selected star from Stellarium into this query page. Open a web browser and go to the SIMBAD site, then choose “Query by coordinates” to get this page.
So we’ll need to look it up on the web, in the SIMBAD database. In the example above, we have already done that, but in this field only two stars have labels and the selected star is not labeled. Make sure that the radio box next to “Stars” is checked, and the slider next to it is dragged all the way to the right. In the “Sky” tab, look under the second column for “Labels and Markers”. Move the cursor to the left edge of the Stellarium window to open the left menu, and select “Sky and Viewing Options Menu” (or just press F4). We already know that because the information at the top left of the screen does not show a label, but just to be sure, do the following: So how do we find out which star this is?įirst, we need to confirm that Stellarium indeed does not have the label for this star. Clicking the star produces some information about it on the top left of the screen, but there is no label, just the generic “star” designation. Notice that only those two stars are labeled. I clicked the star with the crosshairs on it, between the two labeled stars Mizar and Alcor.
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