Question: Powell Observatory is an astronomical observatory located near Louisburg in Miami County, Kansas, near Kansas City, as of the 2010 census, the city population was 4,315, in which country is it located?

Context paragraphs:
Heidelberg-Königstuhl State Observatory: Heidelberg-Königstuhl State Observatory (German: Landessternwarte Heidelberg-Königstuhl ) is a historic astronomical observatory located near the summit of the Königstuhl hill in the city of Heidelberg in Germany.  The predecessor of the current observatory was originally opened in 1774 in the nearby city of Mannheim but degradation of observational conditions there resulted in a relocation to the Königstuhl in 1898.

Santa Lucia Stroncone Astronomical Observatory: The Santa Lucia Stroncone Astronomical Observatory (Italian: Osservatorio Astrometrico Santa Lucia Stroncone ) is a astronomical observatory located at 350 m altitude in Stroncone, near the city of Terni, in Umbria, north central Italy.

Lake Afton Public Observatory: Lake Afton Public Observatory (LAPO) is an astronomical observatory located southwest of Wichita, Kansas in a rural area of Sedgwick County on the north side of Lake Afton.  At the heart of the observatory is a 16 in Ritchey–Chrétien telescope.  The observatory offers programs for the public every weekend throughout the year along with various private, and school programs throughout the week.

McDonald Observatory: The McDonald Observatory is an astronomical observatory located near the unincorporated community of Fort Davis in Jeff Davis County, Texas, United States.  The facility is located on Mount Locke in the Davis Mountains of West Texas, with additional facilities on Mount Fowlkes, approximately 1.3 km to the northeast.  The observatory is part of the University of Texas at Austin.  It is an organized research unit of the College of Natural Sciences.

Višnjan Observatory: Višnjan Observatory (Croatian: "Zvjezdarnica Višnjan" ; obs.  code: 120) is an astronomical observatory located near the village of Višnjan in Croatia.  It is headed by Korado Korlević, a prolific astronomer and discoverer of minor planets.

Rosemary Hill Observatory: Rosemary Hill Observatory (RHO) is an astronomical observatory located near the town of Bronson, Florida (USA), about 38 km southwest of Gainesville, Florida.  The observatory is owned and operated by the University of Florida, and opened in 1967.  It has two telescopes and dormitories for extended observing runs.

Rothney Astrophysical Observatory: The Rothney Astrophysical Observatory (RAO) is an astronomical observatory located near the hamlet of Priddis, Alberta, Canada, about 25 km southwest of Calgary.  The observatory is owned and operated by the University of Calgary (UC), and was dedicated in 1972.  The facility is used for research, undergraduate and graduate teaching, and public outreach.  Research performed at the RAO included a variable star search program, follow-up observations of variable star discoveries, and detailed investigation of binary stars.  An outstanding minor planet search program was also performed with comet discoveries by Rob Cardinal.  The RAO now participates in many follow-up observation programs, including the Quark Nova project.

Louisburg, Kansas: Louisburg is a city in Miami County, Kansas, United States.  As of the 2010 census, the city population was 4,315.

Powell Observatory: Powell Observatory is an astronomical observatory located near Louisburg in Miami County, Kansas, near Kansas City.  It features several large telescopes and is available for public viewing, for private use of Astronomical Society of Kansas City members, and for ongoing research projects.

Tartu Observatory: The Tartu Observatory (Estonian: "Tartu Observatoorium" ) is the largest astronomical observatory in Estonia.  It is located on the Tõravere hill, about 20 km south-west of Tartu in Nõo Parish, Tartu County.  The old Tartu Observatory located in Tartu city centre, is known internationally for its connection to Friedrich Georg Wilhelm von Struve and the Struve Geodetic Arc, of which it is the first reference point.

Supporting paragraphs: Powell Observatory Louisburg, Kansas
Answer: United States