View source for Theodor Jacobsen Observatory

{{Refimprove|date=January 2020}}
{{Infobox Observatory
| name = Theodor Jacobsen Observatory
| background = 
| image = [[Image:Theodor Jacobsen Observatory.JPG|250px]]
| caption = Theodor Jacobsen Observatory (2006)
| organization = [[University of Washington]]
| location = [[Seattle]], [[Washington (U.S. state)|Washington]], United States
| coords = {{coord|47.660432|-122.3092|display=inline,title}}
| altitude = 
| weather = 
| established = 1895
| closed = 
| website = {{url|https://astro.washington.edu/jacobsen-observatory}}
| telescope1_name = Warner & Swasey
| telescope1_type = 6" refractor
| telescope2_name = Bamberg
| telescope2_type = transit
}}
[[Image:TJOdome.JPG|right|thumb|Inside the dome]] 
The '''[https://astro.washington.edu/jacobsen-observatory Theodor Jacobsen Observatory]''' is the on-campus [[observatory]] of the [[University of Washington]]. Built in 1895, it is the second oldest building on campus and was constructed using the remaining [[Tenino, Washington|Tenino]] [[sandstone]] blocks from [[Denny Hall]], the oldest and first building on campus. The [[refracting telescope]], enclosed within the dome, has a six-inch [[L-3 Brashear|Brashear]] [[objective lens]] of a Warner & Swasey [[equatorial mount]]. The observatory also includes a [[transit telescope|transit]] room on the west side and a 45-seat classroom, which was built later, on the south side.

Today, the observatory is primarily used for public outreach and is run jointly by the UW Department on [[Astronomy]] and the [https://www.seattleastro.org Seattle Astronomical Society]. Every first and third Tuesday between April and September the observatory is open to the public.<ref>{{Cite web|url=http://depts.washington.edu/astron/outreach/jacobsen-observatory/|title = Jacobsen Observatory – Department of Astronomy}}</ref>

The observatory is listed on the [[Washington State Heritage Register|State Register on Historical Buildings]].<ref>{{cite web |title=Washington State Department of Archaeology and Historic Preservation |date=12 April 2011 |url=https://dahp.wa.gov/historic-preservation/find-a-historic-place |location=Resource ID: 675088 |format=Listed Date: 1971-07-30}}</ref>

Information on the original design and building of the observatory by [https://astro.washington.edu/astronomy-history Prof. Joseph Marion Taylor] may be found on the University Washington Astronomy Department website and other sources.

==See also==
* [[List of observatories]]

==References==
<references />

==External links==
*[http://depts.washington.edu/astron/outreach/jacobsen-observatory/ Official Website (updated 2019-Apr-25)] 
*[http://www.seattleastro.org/ Seattle Astronomical Society Website]

{{University of Washington}}
{{Portal bar|Astronomy|Stars|Spaceflight|Outer space|Solar System|Education|Science}}

[[Category:Astronomical observatories in Washington (state)]]
[[Category:Public observatories]]
[[Category:University of Washington buildings]]
[[Category:1895 establishments in Washington (state)]]
[[Category:University and college buildings completed in 1895]]


{{US-observatory-stub}}