Visiting Štefánik's Observatory (Štefánikova hvězdárna) in Prague, Czech Republic back to Mar 2009 (Alexandr Zaytsev)

Visiting Štefánik's Observatory (Štefánikova hvězdárna) in Prague, Czech Republic back to Mar 2009

Acquisition type: Lucky imaging

Short visit to Štefánik's Observatory [1] in Prague on Mar 25, 2009. The double refractor by Zeiss placed in the observatory's main dome (consisting of a photographic refractor with 210mm aperture and a visual refractor with 180mm aperture, both with F=3400mm, for f/16.2 and f/18.9 correspondingly). Shown here from two different angles (two iSO800 1/30sec f/4.5 exposures with handheld camera).

"This instrument was first used by König in Vienna, and was relocated to the Štefánik Observatory in Prague in 1928" [2].

Apparently, this 5.5 ton instrument (the mount and counterweights included) got an off-site (!) overhaul recently by the original manufacturer after more than 100 years in service [3]. The picture from manufacturing of this instrument back to 1908 also resurfaced thanks to Carl Zeiss Archives [4]. The same instrument as it stands in the modern factory is shown in [5]. What an amazing connection through time!

[1] https://www.planetum.cz/stefanikova-hvezdarna/

[2] https://commons.wikimedia.org/wiki/File:%C5%A0tef%C3%A1nik_Observatory_Zeiss_Refractor.jpg

[3] ( https://www.mdr.de/nachrichten/thueringen/ost-thueringen/jena/carl-zeiss-teleskop-doppelrefraktor-prag-restaurieren-engineering-100.html ) - now only partially available via https://web.archive.org/web/20220516064642/www.mdr.de/nachrichten/thueringen/ost-thueringen/jena/carl-zeiss-teleskop-doppelrefraktor-prag-restaurieren-engineering-100.html

[4] ( https://cdn.mdr.de/nachrichten/thueringen/ost-thueringen/jena/teleskop-doppelfreraktor-jena-100-resimage_v-variantBig1xN_w-1472.jpg?version=21554 ) - now obsolete

[5] ( https://cdn.mdr.de/nachrichten/thueringen/ost-thueringen/jena/vier-h-jena-engineering-teleskop-doppelrefraktor-100_v-variantBig1x1_w-1280_zc-3061602c.jpg?version=33680 ) - now obsolete

(Attaching images from [4] and [5] here as they might get lost otherwise.)

teleskop-doppelfreraktor-jena-100-resimage_v-variantBig1xN_w-1472.jpg

vier-h-jena-engineering-teleskop-doppelrefraktor-100_v-variantBig1x1_w-1280_zc-3061602c.jpg

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Title: Same image of the double refractor from two different angles in B&W

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C

Title: The second main instrument of the observatory: D=370mm F=3300 (f/8.9) Maksutov-Cassegrain

Description: The telescope was installed in the Western Dome in 1976, and its focal length is rather close to that of the double astrograph in the Main Dome (F=3400 mm).

(Two iSO800 1/30-1/40sec f/4.5 exposures with handheld camera.)

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Visiting Štefánik's Observatory (Štefánikova hvězdárna) in Prague, Czech Republic back to Mar 2009

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Visiting Štefánik's Observatory (Štefánikova hvězdárna) in Prague, Czech Republic back to Mar 2009

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