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Upcoming Events
Apr
3
Mon
5:30 pm Tree Advisory Group (TAG) @ City of Ukiah Civic Center
Tree Advisory Group (TAG) @ City of Ukiah Civic Center
Apr 3 @ 5:30 pm – 6:30 pm
Tree Advisory Group (TAG) @ City of Ukiah Civic Center | Ukiah | California | United States
TAG is a volunteer organization dedicated to the enhancement of the urban forest in Ukiah. TAG advises the City of Ukiah on issues such as tree care, planting, and education. They also champion City tree programs (e.g. the Landmark Tree … Continue reading
Apr
5
Wed
1:00 pm Competitive Bidding – Requiremen... @ Ukiah Valley Conference Center
Competitive Bidding – Requiremen... @ Ukiah Valley Conference Center
Apr 5 @ 1:00 pm – 3:00 pm
Competitive Bidding - Requirements and Compliance @ Ukiah Valley Conference Center | Ukiah | California | United States
The City of Ukiah, the County of Mendocino and the North Coast Builders Exchange invite you to attend two FREE Workshops Both Workshops will be offered on TWO separate days! COMPETITIVE BIDDING-REQUIREMENTS AND COMPLIANCE for CONTRACTORS, LOCAL GOVERNMENT AND SPECIAL … Continue reading
3:00 pm Competitive Bidding- Regulations... @ Ukiah Valley Conference Center
Competitive Bidding- Regulations... @ Ukiah Valley Conference Center
Apr 5 @ 3:00 pm – 5:00 pm
Competitive Bidding- Regulations and Responsibilities @ Ukiah Valley Conference Center | Ukiah | California | United States
The City of Ukiah, the County of Mendocino and the North Coast Builders Exchange invite you to attend two FREE Workshops Both Workshops will be offered on TWO separate days! REGULATIONS AND RESPONSIBILITIES for CONTRACTORS, LOCAL GOVERNMENT AND SPECIAL DISTRICTS … Continue reading
Apr
6
Thu
8:00 am Competitive Bidding- Requirement... @ Ukiah Valley Conference Center
Competitive Bidding- Requirement... @ Ukiah Valley Conference Center
Apr 6 @ 8:00 am – 10:00 am
Competitive Bidding- Requirements and Compliance @ Ukiah Valley Conference Center | Ukiah | California | United States
The City of Ukiah, the County of Mendocino and the North Coast Builders Exchange invite you to attend two FREE Workshops Both Workshops will be offered on TWO separate days! COMPETITIVE BIDDING-REQUIREMENTS AND COMPLIANCE for CONTRACTORS, LOCAL GOVERNMENT AND SPECIAL … Continue reading
10:00 am Competitive Bidding- Regulations... @ Ukiah Valley Conference Center
Competitive Bidding- Regulations... @ Ukiah Valley Conference Center
Apr 6 @ 10:00 am – 12:00 pm
Competitive Bidding- Regulations and Responsibilities @ Ukiah Valley Conference Center | Ukiah | California | United States
The City of Ukiah, the County of Mendocino and the North Coast Builders Exchange invite you to attend two FREE Workshops Both Workshops will be offered on TWO separate days! REGULATIONS AND RESPONSIBILITIES for CONTRACTORS, LOCAL GOVERNMENT AND SPECIAL DISTRICTS … Continue reading

Observatory Park

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City of Ukiah Observatory Park, International Latitude Observatories, Northern Hemisphere

Mendocino County’s Legacy in the World of Science

Landmarks are not frozen in time. They are not like prehistoric insects preserved in fossilized amber. They are living and their heritage is nurtured by community commitment and individual involvement.

In 2014 Observatory Park was dedicated to the people of Ukiah. From that day forward a commitment was made to preserve the Ukiah Latitude Observatory and for the park to become part of Ukiah’s living heritage.

Be a part of the heritage and come enjoy this unique park located at the 400 block of Observatory and Luce Avenues.

Project History

International Latitude Observatories, Ukiah Observatory Park, Northern Hemisphere

The International Latitude Observatories were a system of (originally) six observatories located near the parallel of 39° 08′ north latitude. They were used to measure the variation in latitude that occurs as a result of the “wobble” of the Earth on its polar axis.

United States Coast and Geodetic Survey joined the International Polar Motion Service program in 1897 to study the precession, or “wobble” of the Earth’s axis, and its effect on measures of latitude. Six separate observatories were created along the parallel 39° 08′ north latitude. The alignment of all six stations along the parallel helped the observatories to perform uniform data analysis.

Economic difficulties and war caused the closings of some of the original stations, though a newer station was created in Uzbekistan after World War I. The various stations continued to function until advances in computer technology and satellite observations rendered them obsolete in 1982. The data collected by the observatories over the years still has use to scientists, and has been applied to studies of polar motion, the physical properties of the Earth, climatology and satellite tracking and navigation.

Ukiah Observatory

Ukiah Latitude Observatory, City of Ukiah Park, Northern Hemishpere, Historic

Ukiah Latitude Observatory Was Built in 1899

The small size of the building (12 feet square) and the esoteric character of the work that took place within speak modestly of the international importance of the landmark. The research provided all data used in polar motion studies for decades, and fostered international cooperation which transcended the differences between man during times of war and international strain.

The city acquired the property in 1991 but the observatory and adjoining land was closed to the public until March 2014. A $54,000 grant from the California Land and Water Conservation Fund, along with matching funds from the City of Ukiah, made the improvements necessary to reopen the park.

Observatory Park Oak Tree, Ukiah, CAA large heritage Valley Oak anchors the north end of the park. Spreading before it is a large grassy field providing an unobstructed view of the iconic tree.

Ukiah’s first Pétanque court was completed in 2010 for the game of boules, or balls, closely related to bocce by the Redwood Empire Boules Club.

A peace pole, dedicated to Erica Enzer, an international peace activist and former member of the Ukiah War Resistor’s League is located adjacent to the Grove of Nations (trees representing each of the regions where the latitude observatories were located).

Labyrinth in Observatory Park, Ukiah, CAThe park has had improvements made before its public opening, including the restoration of the historic observatory and a labyrinth (pictured at left) installed in 2005.

The former observer’s residence has been used by Ukiah Unified School District since 2011 for the Community Transition Program which assists special needs students aged 18 to 22.

Photo Gallery



Get Involved

For more information about how you can become involved in preserving the Ukiah Latitude Observatory and our community’s cultural heritage, contact :

Martin Bradley

City of Ukiah

411 W. Clay St

Ukiah, CA 95482

707-467-5768

mbradley@cityofukiah.com


Observatory Park News & Events

Observatory Park: Tours of Earth & Sky

Observatory Park is the home of the Ukiah Latitude Observatory, one of five international latitude observatories around the world operated from 1899 to 1982. The City of Ukiah offers several events associated with this unique park:

  • Tours of Earth and Sky: Park Interpreter Martin Bradley will host a lecture series in the Ukiah Civic Center’s Council Chambers with guest speakers offering talks on astronomy and the natural sciences.
  • Docent Tours of the Observatory and park are scheduled by appointment for small groups and individuals on Thursday, Friday, and Saturday.
  • Open Skies are scheduled periodically where amateur astronomers bring their telescopes, experience, and knowledge to explore the moon, planets, and deep sky wonders.

There is no charge for these events. Reservations are required and young children are welcome with a supervising adult. If you have questions, are interested in upcoming lectures, would like to schedule a tour, or are interested in finding out about the public viewing nights, call 707-467-5768.


News and Event Posts

Ukiah Latitude Observatory

City of Ukiah WELCOME TO OBSERVATORY PARK Observatory Park was deeded to the City of Ukiah in 1991 by the US Department of Commerce after 83 years of continuous astronomical observation by the U.S. Coast and Geodetic Survey. The small wood-framed structure at the south entrance to the park on Observatory Avenue played a key role in the scientific investigation of the Earth’s rotation. In 1898, the International Geodetic Association established a network of observatories to measure the wobble of the planet on its axis by plotting the locations of specific stars. This spot in Ukiah was chosen together with sites in Gaithersburg Maryland, Italy, Japan, and the Russia. All five lay along the same latitude (39° 8’ N). The park is preserved as an open space “for the quiet enjoyment of the residents of Ukiah” and to provide clear ground and satellite views of small brass survey monuments located on the grounds. Though technology rendered the nightly observations by resident astronomers unnecessary, the survey monuments are still referred to today as benchmarks to determine aberrations in of the earth’s motion.
Ukiah Latitude Observatory
Ukiah Latitude ObservatoryMar 19, 2017 @ 7:55pm
Students in the Community Service program at the Developing Virtue Secondary School at the City of Ten Thousand Buddhas have been volunteering every other Friday at the Observatory. This past Friday, to help curb the use of pesticides at the City park, they volunteered to pull weeds around the Observatory building and under the redwood tree north-east of the building. Last week they inventoried the eyepieces for our various telescopes.

The schools’ motto is the Six Great Principles of the City of Ten Thousand Buddhas—no fighting, no greed, no seeking, no selfishness, no pursuing of personal advantage, and no lying.

It's great to have the help of these girls at Observatory Park. If you or a group you are in are interested in helping, email us at observatory [at] cityofukiah [dot] com, or leave a message at 707-467-5768. Thank you!
Ukiah Latitude Observatory
Ukiah Latitude ObservatoryMar 12, 2017 @ 6:47pm
I have been wanting to try the time-lapse feature on the iPhone to see how sensitive it might be at night. Late last January - 1/30/17 at 6:00 pm to be exact - I set up an older iPhone 5 on a tripod on the carport roof. It's not spectacular, but still pretty cool. And what potential! SUBJECT: The crescent moon in its late January/early February dance with Venus. GEEKY STUFF: I didn't write down how long the time-lapse was (thought it would tell me). A Google search showed a table of the capture rate for for this feature. Apple chose to make a time-lapse sequences - no matter how long the sequence - about 20 seconds viewing time. It changes depending on the duration of the sequence. This one was either 20 minutes capturing 1 frame every 2 seconds or 40 minutes, capturing and saving one frame every 4 seconds. If it had been 120 minutes, it would be 1 frame every 8 seconds and would still make a 20 second video. My guess is it was 40 minutes. Truth be told, MY mode was "set and forget, let apple do the rest".
TAKEAWAY - This would be great for sunsets and sunrises, especially if you had city lights or traffic in the scene. Or at night, one like this - the moon and a bright planet setting. My HOPE was for stars to be bright enough to show constellations marching across the sky. That would be asking a lot for a smart phone camera. My next goal: a lunar eclipse!
Ukiah Latitude Observatory
Ukiah Latitude ObservatoryMar 11, 2017 @ 8:35pm
Good news! The road to Observatory Park is getting the long awaited makeover. It has dragged down our reviews on Facebook 🙁 . [Adrian Guerrero, come back when it completed and give us a another star 🙂 ] In addition to reviews, we welcome any feedback - comments, posts, likes, text messages or emails. Especially ways to make the Park better. Of course, we can't fix things beyond our control, but inside the open gate, any ideas?
Ukiah Latitude Observatory
Ukiah Latitude ObservatoryFeb 27, 2017 @ 10:29pm
Ukiah Latitude Observatory
Ukiah Latitude ObservatoryFeb 26, 2017 @ 9:12pm



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