Archive | November, 2016

Plot of apparent diameter of Jupiter for the time period 2017-2026

Apparent diameter plot for Jupiter 2017-2026

The apparent diameter of Jupiter varies with the Earth-Jupiter distance. Depending on the distance, the apparent angular diameter of Jupiter is between approx. 0.5 and 0.8 arcminutes. For best astrophotography results, one should pick a time when Jupiter is closest. Similar to my plot of the apparent size of Venus, I wrote a short program to plot Jupiter’s apparent diameter for the […]

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Plot of the apparent diameter of the Moon for the time period 2017-2018

Apparent diameter plot for the Moon 2017-2018

The apparent diameter of the Moon varies with the Earth-Moon distance. Depending on the distance, the apparent angular diameter of the Moon is between 29.4 and 33.5 arcminutes. For best astrophotography results, one should pick a time when the moon is closest. Similar to my plot of the apparent size of Venus, I wrote a short program to plot the Moon’s […]

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Phases of Venus and evolution of its apparent diameter. (Statis Kalyvas - VT-2004 programme)

Venus apparent diameter plot for 2017-2020

The apparent size of Venus varies dramatically with the Earth-Venus distance, depending on both orbits around the sun. The apparent angular diameter of Venus is between 0.175 and 1 arcminutes. Wikipedia has nice images on that and says that… “the extreme crescent phase of Venus can be seen without a telescope by those with exceptionally acute eyesight, at the […]

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Reading Raspberry Pi chip temperature with mainline Linux kernel

This tutorial is based on a previous article where we installed pure Debian 9 with a recent mainline/vanilla Linux kernel on a Raspberry Pi, and so differs from what would be done on a Raspbian Distribution with a Raspbian kernel. In this article, we will read the Raspberry Pi chip temperature. Here is my previous article: Raspberry […]

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Setting I2C bus speed on a Raspberry Pi via Device Tree

This tutorial is based on my previous article where we installed pure Debian 9 with a recent mainline/vanilla Linux kernel, and so differs from what would be done on a Raspbian Distribution with a Raspbian kernel. In this article, we will set the I2C bus speed on a Raspberry Pi. Here is my previous article: Raspberry Pi […]

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