Dobsonian Telescope: First Light

Tonight was my first night out with my new 10-inch Dobsonian telescope. My first target was The Moon. The scope produced a very sharp image with a 24 mm wide field eyepiece.

My second target was Jupiter. I was able to resolve the four Galilean moons: Io, Europa, Ganymede and Callisto. Also, I could resolve two bands on Jupiter. I switched to a 17 mm eyepiece for a slightly closer look, and the bands were clearer. The view was similar to this image.

The tracking function worked well and kept Jupiter in the field of view. Jupiter was also low in the sky from 9 to 10 PM, and there was some thin cirrus clouds, which would account for the fuzzy periods. Jupiter will be higher later this year.

For my next viewing opportunity I will need for clearer, darker skies to align the Go-To function. Also, I need to try using my reading glasses. Also, I will try my camera attachment, connected to my laptop. I am looking forward to viewing Saturn and Mars.

New Telescope

I recently bought a new telescope. It is a 10 inch Dobsonian with a Go-To drive. The base required some assembly, which I completed in an hour. Now it is composed of two main parts, the base and optical tube. It sits on a cart so that it can be easily moved from indoors and then back inside. The finder-scope has been installed and aligned. I hope to complete its initialization soon and start observing operations. However, cloudy, rainy weather has curtailed any observations.

Solar Wind Storm


Propagation on the 40-meter and 75-meter bands has been very poor during the past few days. I have a backlog of several radiograms to send, as a result, since it has been difficult to hear the other stations on the nets where I usually check-in.



There is a wide “hole” in The Sun’s atmosphere from which gaseous material has been flowing. The resultant solar winds have caused a geomagnetic storm to occur on Earth. The Aurora has been visible in northern Minnesota. The geomagnetic storms may last for more than a day or two.