Contemporary civilization, whatever its advantages and achievements, is characterized by many features which are, to put it very mildly, disquieting: to turn from this increasingly artificial and strangely alien world is to escape from unreality; to return to the timeless world of the mountains, the sea, the forest, and the stars is to return to sanity and truth.

- Robert Burnham, Jr.


Since the year 2007 I have logged all of my observations. I always strive to observe objects I did not observe before.
At the eyepiece I log my observations on a digital memo recorder to later work them out in AstroPlanner.

Carbon Stars 431
Open Clusters 542
Globular Clusters 128
Nebulae 87
Dark Nebulae 11
Planetary Nebulae 132
Supernova Remnants 20
Galaxies 3363
Asterisms 62
Double Stars 2659
Other 33
Unique objects 7466
Observations 10068

I log my observations in Dutch. Some are translated to English. If you wish to see the English translation for (a) specific object(s), please let me know.
The table on the right shows the number of unique objects observed and the total number of recorded observations. Double star observations are logged only when at least one component was split from the primary.
Click the Excel icon to download the complete list. The image shows the locations of all objects for which at least one observation was logged.

Last updated: 20 January 2018

It should come as no surprise that my observing plan is CSOG. It was written with a 12" telescope in mind. Other editions were filtered from that concept, with new ones like Arp and Hickson added later.

Deep Sky

I have almost completely ceased deep sky observations in the Netherlands. Dutch skies are often humid, transparency is generally suboptimal. Quite serious light pollution deteriorates conditions even further. Brighter objects reveal little detail while fainter ones struggle not to drown in the atmosphere. This is why I save serious deep sky observing for trips abroad. Southern France is a favorite, but so is the Karoo desert of South-Africa.

Carbon Stars

Carbon stars are an interesting object category, one of the few to reveal unmistakeable color. From deep red (R Leporis, T Lyrae) to orange and paler hues. Quite a few bright ones are in reach of telescopes of smaller aperture. Even under poor skies, many of these colored stars can be observed with ease. CSOG's 5-6" & 8-10" constellation editions provide plenty of bright ones to observe.

Double Stars

Double stars are my main targets when observing under Dutch skies. Even when the atmosphere steals a magnitude or two, lots of double stars remain to be observed. Literally thousands of them. While transparency can be poor in this part of the world, the seeing can be quite good, allowing for many close pairs to be split.
Like the deep sky, I use a targeted approach to observe doubles. Currenly my focus is on Struve (STF, STT, STFA, STFB, STTA). I use a workflow in AstroPlanner with macros in Excel and Word to quickly create observing guides and Autostar tours for all WDS double stars of a specific naming in a constellation: Struve, Burnham, Espin, J. Herschel, etc.

To confine our attention to terrestrial matters would be to limit the human spirit.

- Stephen Hawking