The sunken mill

Lake Rottach (view from Untergassen towards Petersthal 2012)
Lake Rottach (view from Untergassen towards Petersthal 2012)

About the name

The Observatory is named after the saw-mill "Schorenmühle", which stood in the Rottach valley, between the villages Petersthal and Moosbach near Sulzberg in Oberallgaeu.

In the late 1980's the river Rottach was dammed to construct a reservoir, and the valley including the mill was flooded.

 

Nowadays I enjoy sailing over the sunken mill (SSGR).

 

See here for live webcam image and weather info  of lake Rottach.

plan of Lake Rottach
plan of Lake Rottach

The picture shows a plan of the Rottachsee reservoir drawn on a 1985 aerial photo (courtesy Erwin Hoesle). The mill is near the centre, at the three-forked road leading to the villages of Moosbach (top left), Untermoos (top right) and Petersthal (bottom).  <click picture for full resolution>

 

Location

The mill stood at lon 10.378, lat 47.64 - right in the middle of Europe !

Nowadays a small island in the lake marks the approximate location.

 

The Observatory

The observatory is a private garden observatory. Actually the permanent hardware is rather humble: it just consists of a permanent pier.

The EQ-6 and telescope are mounted every observing night.

 

The current working horse is a Celestron C9.25 with the homebuilt SMAGS classical grating spectrograph (see SMAGS sites on the menu at left).

 

As secondary instrument there is an INTES MK-66 15cm telescope with the homebuilt SMEtte Spectrograph (prototype). The prototype SMEtte is rigidly connected to the telescope and cannot be interchanged easily.

 

 

SMEtte behind the MK-66 on the GM-8
SMEtte behind the MK-66 on the GM-8

Before the 5" pier (which was constructed by Brian from Astroparts who had a similar 4" one on display at the ATT which I liked because of its functional design and reasonable price - thanks Brian, it works very well!) I had the MK-66 on a portable Losmandy GM-8 mount.

The MK-66 is now the primary instrument for photometry, using a 0.5x focal reducer, an ATIK-414 camera, and an ATIK manual filter wheel with photometric V and Ic filters.

My start in amateur spectroscopy

to be written...