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The Ladd Observatory is an astronomical observatory of Brown University in Providence, Rhode Island, US. The observatory was dedicated in 1891 and is named for benefactor Herbert W. Ladd who funded the construction.[1]

Ladd Observatory
Ladd Observatory front.jpg
OrganizationBrown University
LocationProvidence, Rhode Island, US
Coordinates41°50′20″N 71°23′57″W / 41.83889°N 71.39917°W / 41.83889; -71.39917
Altitude226 feet (69 m)
WeatherSee the Clear Sky Chart
Established1891 (1891)
WebsiteLadd Observatory
Telescopes
Brashear / Saegmuller12" refractor
Saegmuller80 mm transit instrument
Ladd Observatory
Ladd Observatory is located in Rhode Island
Ladd Observatory
Ladd Observatory is located in the US
Ladd Observatory
LocationProvidence, Rhode Island, US
Coordinates41°50′20″N 71°23′57″W / 41.83889°N 71.39917°W / 41.83889; -71.39917Coordinates: 41°50′20″N 71°23′57″W / 41.83889°N 71.39917°W / 41.83889; -71.39917
Built1891
ArchitectStone, Carpenter & Willson
Architectural styleClassical Revival
NRHP reference #93000583
Added to NRHPJune 6, 2000
Ladd Observatory is located in the US
Ladd Observatory
Location of Ladd Observatory
Commons page Related media on Wikimedia Commons

Contents

HistoryEdit

ConstructionEdit

Ladd Observatory was designed by the Providence-based firm of Stone, Carpenter & Willson. The building was added to the National Register of Historic Places in 2000.[2]

TelescopeEdit

The main telescope is a 12-inch (30 cm) refractor with a lens made by John Brashear following the design of Charles S. Hastings. The equatorial mount and mechanical clock drive were made by George N. Saegmuller.

TimekeepingEdit

Besides astronomical research and education, Ladd sent out a time signal for decades. After determining no one was receiving the time signals, the transmissions were discontinued in 1973.[3]

AssociationsEdit

Astronomers associated with Ladd include Winslow Upton, Frank W. Very, Frederick Slocum, Robert Horace Baker, and Charles H. Smiley.

H. P. Lovecraft had free access to the observatory for several years and wrote astronomy articles for Providence newspapers based upon his study there between 1906 and 1918.[4]

See alsoEdit

ReferencesEdit

  1. ^ Arnold N. Robinson & Carla Swanson (June 6, 2000). "National Register of Historic Places Registration Form: Ladd Observatory (including accompanying 5 photos, from 1992)" (pdf). National Park Service.
  2. ^ "National Register Asset Details". The Focus Digital Asset Management System. National Park Service. Retrieved 6 February 2016.
  3. ^ Mitchell, Martha (1993). "Ladd Observatory". Encyclopedia Brunoniana. Providence, RI: Brown University Library.
  4. ^ Loucks, Donovan K. (29 March 2006). "H.P. Lovecraft's Interest in Astronomy". The H.P. Lovecraft Archive. Retrieved 7 January 2016.

External linksEdit