Sol'Ex - Exploded view

Building my Sol'Ex ... Exploded view. The slit has an angle of 15°. The grating has 2400 grooves/mm. Shortly I will be discussing the theory. 

Sol'Ex with ASI2600MC

 

Some further experimentation with my Sol'Ex. This time I'm using my ASI2600MC color camera. This camera has an APS/C sensor which results in a capturing a bigger spectrum. Getting a larger spectrum was easier to find the absorption lines: eg. CaK &H line, H beta, Mg triple, Na double and H-alpha. I was also able to find the slit, and thus the zero order. 

Saturn: First picture of 2023

My first picture of Saturn this year 2023. It's 17 days before opposition and after a long time a cloudfree night. Seeing was poor and good transparency. The image shows some destinction of the clouds. 

Setting: 

TAL200K f/8.5 ASI224MC

ASI224MC setting

    - WB setting: R55, B85

    - Exposure 65ms

    - RAW16 488x488 PNG files (no SER)

Barlow x2, ADC, UV/IR cut filter

Software: SharpCap 4, AS3! (5% Best of), AstroSurface U4, CS4, WinJupos

First light with Sol'EX

My first light with Sol'EX with TS APO60/360 f/6 and ASI224MC. Capturing was done using SharpCap4 and editing with CS4. Still some learning to do but so far... real cool! I'm to trace back the Ca K&H line, hydrogen Beta and the triple magnesium. In the red spectrum I'm not sure what the elements are.

Website J Giesen Physics and Astronomy - Use of Applets via Chrome

Sometimes I surprise myself about the functioning of a website and I underestimate the value and power of a website. I'm talking about J.Giesen's website (http://www.jgiesen.de/welcomeEnglish.htm) which provides a huge information about the Physics and Astronomy and more specific on everything related to the sun and it's calculations.

The website is referring to different Java applets. I knew this but only now I figured out how to run them. So what did I do?

- I add CheerpJ Applet Runner (free of charge) to my Chrome browser (edge is also possible)

- Next, I go to a webpage of J.Giesen's website with a specific applet and click on "extentions" and o double click on CheerpJ Applet Runner. What happens now is that the applet will be opened. Real cool.

These applets are a real help in understand calculations of spherical astronomy and solar calculations. A real cool applet is the one of the Meridian of Santa Maria degli Angeli e dei Martiri in Rome which gives you a details. 

SAVE THE DATE : 9 and 10 September 2023 – Open Doors at the Humain Radio Astronomy Station

Source: website: https://www.astro.oma.be.

Mark your calendars: the weekend of the 9th and 10th of September 2023! Join us at the Radio Astronomy Station of Humain, in Wallonia, to celebrate Belgium’s rich and diverse heritage.

This station was founded in 1953 by the Royal Observatory of Belgium to house the very first Belgian radio telescopes dedicated to observing the Sun. In the 1960s, a solar interferometer of 44 radio telescopes was constructed and operated up until 2001. Today, the station continues to host radio and optical experiments to observe the sky, the Sun, the Earth’s space environment and its atmosphere.

This is the first time this station will open its doors to the public, where you will be able to stroll along the two north-south and east-west axes of the old interferometer, see the old control laboratory of the interferometer, discover the history, of the site and its observations and know everything about the current scientific activities.

There are also activities for children. Bring your family, friends, and neighbours, to embark on a captivating cosmic adventure!

Dates: 9th-10th September 2023 during the Heritage days
Time: 10h -18h
Location: Rue de l’Observatoire, 6900 Marche en Famenne.
Foodtrucks will be present on site.

Active Sun

The Sun is currently very active but the moments of a clear sky are rather rare.