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iljitsch.com

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Hi, I'm Iljitsch van Beijnum. Here on iljitsch.com I publish articles and post links about a range of topics.

Also have a look at my business web site inet⁶ consult.

More comet hunting

It was reasonably clear again yesterday night, so I tried shooting the comet from my balcony, which worked pretty well despite the two streetlights illuminating the camera:

I then went to a dark place just outside the city, and took this shot:

The blue in the first photo is probably due to the auto white balance taking some foreground that I cropped out into account. Soon after I started shooting, mist came rolling in, which may explain that the detail wasn't better in the second shot.

Apart from that, the comet head clearly looks greenish here (click on the second photo to see a larger version), and the comet has moved a surprising distance between the first shot at 0:09 and the second at 1:37.

Same 105 mm f/2.8 macro lens wide open, ISO 1000 for the first shot, ISO 1600 for the second.

Permalink - posted 2020-07-19

Comet hunting

Earlier this week, I read that there's a comet that's visible. It's called C/2020 F3 (NEOWISE), but I'll call it Neowise for short, after the space telescope that found it.

Read the article - posted 2020-07-18

Even more BASIC: PC-BASIC on the Mac

After my BASICODE adventures a few days ago, I really wanted to see if I could run a BASICODE game on my VT420 terminal.

Full article / permalink - posted 2020-07-06

BASICODE: software distribution by radio broadcast in the 1980s

In 2009, I started an effort to digitize all my cassette tapes. As my last computer that still has a line in port is facing retirement, I decided to finally finish that project. Perhaps more about this later. Turns out some of these old cassettes have weird things on them, including radio broadcasts that contain computer programs.

Full article / permalink - posted 2020-07-04

COVID-19: tien miljoen besmettingen en een half miljoen doden wereldwijd...

Image link - posted 2020-06-28

18 years of RIPE and IETF meetings

In the 18 years from 2002 to 2019 I attended 9 RIPE meetings, 1 LACNIC meeting and 16 IETF meetings in 20 cities and 10 countries on 3 continents. Here are a few random photos from each meeting or city.

You may notice camera improvements over time. 😃

Permalink - posted 2020-06-16

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