DFM Engineering is an American telescope and optics manufacturer founded in 1979 by Frank Melsheimer in Longmont, Colorado. [1] [2] DFM makes medium size Cassegrain telescopes and their associated systems including telescope optics, control systems, and mounts. A range of pre-designed telescopes are made, as are various custom installations. DFM produces its classical Cassegrain design in various apertures from 16 inches (0.4 m) to 50 inches (1.3 m) and larger. [3] The base DFM 16-inch (40 cm) telescope system cost roughly 94 thousand USD in 2005. [4]
DFM produced a 1.6 m solar telescope for the Big Bear Solar Observatory. [5] The United States Navy purchased a 1.3 m (51-inch) DFM telescope for the United States Naval Observatory Flagstaff Station in Arizona, USA. [6]
DFM installations include many universities and institutions, including: Alfred University, Appalachian State University, Central Michigan University, Chabot Center, Clay Center-Dexter School, College of Charleston, College of Southern Idaho, University of Colorado, Dickinson College, Emory University, Embry-Riddle Aeronautical University, Daytona Beach, Florida Institute of Technology, Johns Hopkins University, Lewis & Clark College, Middlebury College, PARI / UNCA, Rowan University, Westmont College, [7] University of Alabama, University of Calgary, University of Victoria, University of Michigan, University of Montreal, University of Wyoming, Valdosta State University, Virginia Military Institute, Williams College, Academia Sinica Institute of Astronomy and Astrophysics and University of the Free State.
DFM engineering produced the telescope for the Asteroid Terrestrial-impact Last Alert System (ATLAS) project. [8] ATLAS was funded by a grant from NASA and includes initially two telescopes set 100 miles (160 km) apart. [9] The telescopes were tested by DFM in Colorado, U.S. in 2015 and are now operational in the Hawaiian Islands. [10] The telescopes are designed to detect large near-Earth objects and identify those which threaten to impact Earth. [11]
DFM also produced the telescope for Meter Class Autonomous Telescope (MCAT). [12] MCAT is designed to look for space debris, with a wide (41 degree) field of view, f/4 optics, and 1.4 m aperture. [13] It is a reflecting telescope on a double horseshoe mount. [14] MCAT is located on Ascension Island in the South Atlantic Ocean. [15]
Lowell Observatory is an astronomical observatory in Flagstaff, Arizona, United States. Lowell Observatory was established in 1894, placing it among the oldest observatories in the United States, and was designated a National Historic Landmark in 1965. In 2011, the Observatory was named one of "The World's 100 Most Important Places" by Time Magazine. It was at the Lowell Observatory that the dwarf planet Pluto was discovered in 1930 by Clyde Tombaugh.
A Ritchey–Chrétien telescope is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary mirror designed to eliminate off-axis optical errors (coma). The RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration. Since the mid 20th century, a majority of large professional research telescopes have been Ritchey–Chrétien configurations; some well-known examples are the Hubble Space Telescope, the Keck telescopes and the ESO Very Large Telescope.
The Mount Wilson Observatory (MWO) is an astronomical observatory in Los Angeles County, California, United States. The MWO is located on Mount Wilson, a 5,710-foot (1,740-meter) peak in the San Gabriel Mountains near Pasadena, northeast of Los Angeles.
Boyden Observatory is an astronomical research observatory and science education centre located in Maselspoort, 20 kilometres (12 mi) north-east of the city of Bloemfontein in Free State, South Africa. The observatory is managed by the Physics Department of the University of the Free State (UFS). The Friends of Boyden assist the observatory as a public support group, organising open evenings and protecting its public interest. Boyden also makes use of members of ASSA Bloemfontein Centre, the amateur astronomy club of the city, for presenters and telescope assistants.
The Hale Telescope is a 200-inch (5.1 m), f/3.3 reflecting telescope at the Palomar Observatory in San Diego County, California, US, named after astronomer George Ellery Hale. With funding from the Rockefeller Foundation in 1928, he orchestrated the planning, design, and construction of the observatory, but with the project ending up taking 20 years he did not live to see its commissioning. The Hale was groundbreaking for its time, with double the diameter of the second-largest telescope, and pioneered many new technologies in telescope mount design and in the design and fabrication of its large aluminum coated "honeycomb" low thermal expansion Pyrex mirror. It was completed in 1949 and is still in active use.
The Fick Observatory was an astronomical observatory owned and operated by Iowa State University. Located southwest of Boone, Iowa, it was named after Davenport, Iowa, amateur astronomer Erwin W. Fick. The observatory closed in 2015.
Mount Laguna Observatory (MLO) is an astronomical observatory owned and operated by San Diego State University (SDSU). The telescope was operated in partnership with the University of Illinois at Urbana-Champaign (UIUC) until 2000. MLO is located approximately 75 kilometers (47 mi) east of downtown San Diego, California (USA) on the eastern edge of the Cleveland National Forest in the Laguna Mountains on the SDSU Astronomy Campus near the hamlet of Mount Laguna. MLO was dedicated on June 19, 1968, seven years after SDSU's Department of Astronomy became an independent academic department of SDSU's College of Sciences. The dedication took place during the 1968 summer meeting of the Astronomical Society of the Pacific. Currently SDSU is working with University of Kansas (KU), and UNC Chapel Hill on various projects. MLO also engages with the public through a series of scientific outreach efforts such as the summer visitors program (SVP). SVP's take place on select dates throughout the summer months and include scientific demonstrations in the museum / gift shop, an introductory lecture on astronomy, and a stargazing session using a myriad of telescopes such as the 0.52 m Reginald Buller 21-inch Visitors' Telescope. The SVP is predominantly run by graduate students within the SDSU Astronomy Master's program.
Brooks Astronomical Observatory is an astronomical observatory owned and operated by Central Michigan University. It is located in Mount Pleasant, Michigan (USA). The observatory was established in 1964 and is located on the roof of the Brooks Hall science building. Both the building and observatory are named for Kendall P. Brooks, instructor of astronomy and other subjects in the period of 1910-1947.
Anderson Mesa Station is an astronomical observatory established in 1959 as a dark-sky observing site for Lowell Observatory. It is located at Anderson Mesa in Coconino County, Arizona, about 12 miles (19 km) southeast of Lowell's main campus on Mars Hill in Flagstaff, Arizona.
The Piszkéstető Station or Piszkéstető Mountain Station is an astronomical observatory in Mátraszentimre in Mátra Mountains, about 80 kilometers (50 mi) northeast of Hungary's capital Budapest. It is a station of Konkoly Observatory, first built in 1958. It has the observatory code 461 and 561 for being used by the Szeged University and Konkoly Observatory, respectively.
The C. Donald Shane telescope is a 120-inch (3.05-meter) reflecting telescope located at the Lick Observatory in San Jose, California. It was named after astronomer C. Donald Shane in 1978, who led the effort to acquire the necessary funds from the California Legislature, and who then oversaw the telescope's construction. It is the largest and most powerful telescope at the Lick Observatory, and was the second-largest optical telescope in the world when it was commissioned in 1959.
Chabot Space and Science Center, located in Oakland, California, is a center for learning in Earth and space science, which features interactive exhibits, planetariums, a large screen theater, hands-on activities, and three powerful telescopes.
The United States Naval Observatory Flagstaff Station (NOFS), is an astronomical observatory near Flagstaff, Arizona, US. It is the national dark-sky observing facility under the United States Naval Observatory (USNO). NOFS and USNO combine as the Celestial Reference Frame manager for the U.S. Secretary of Defense.
Table Mountain Observatory (TMO) is an astronomical observation facility operated by NASA's Jet Propulsion Laboratory. It is located in Big Pines, California, in the Angeles National Forest near Wrightwood, north-northeast of Los Angeles, California.
Stony Ridge Observatory is an astronomical observatory built by and for amateur astronomers in the mountains of Los Angeles County, California, in 1957. When installed, its 760 mm (30 in) Newtonian-Cassegrain likely ranked as 8th largest of all telescopes in California, and one of the largest amateur telescopes in the United States. The telescope is designed so that one of four Newtonian foci, or a Cassegrain focus, can be used. Asteroids 10168 Stony Ridge, 144633 Georgecarroll and 327030 Alanmaclure, were discovered at the observatory, and other scientific research has been conducted there. The observatory also has a 12-inch Cassegrain telescope and a number of accessory items, including CCD cameras and computer equipment.
The Meade LX200 is a family of commercial telescopes produced by Meade Instruments launched in 1992 with 8" (20.32 cm) and a 10" (25.4 cm) Schmidt–Cassegrain models on computerized altazimuth mounts. Two larger models, a 12" (30.48 cm) and a 16" (40.64 cm), quickly followed. The original version was later informally named the "classic" LX200 as newer upgraded versions replaced it. The first of these was the LX200GPS, which featured global positioning system electronics. A 360 mm (14 in) LX200GPS was later added to the line.
The Dark Sky Observatory (DSO) is an astronomical observatory owned and operated by Appalachian State University (ASU). It is located 9 kilometers (5.6 mi) east of Deep Gap, North Carolina (USA), off of the Blue Ridge Parkway, and 32 kilometers (20 mi) east of the ASU campus in Boone, North Carolina It was established in 1981, and is used for research, instruction, and public viewing events. The Cline Visitors' Center was completed in 2011.
The Rothney Astrophysical Observatory (RAO) is an astronomical observatory located near the hamlet of Priddis, Alberta, Canada, about 20 kilometres (12 mi) 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 is a link in the Skynet Robotic Telescope Network.
The Embry–Riddle Observatory is an astronomical observatory owned and operated by Embry-Riddle Aeronautical University, Daytona Beach. Hosting an array of optical instruments, this observatory is situated on the roof of the College of Arts and Sciences building in Daytona Beach, Florida.
Asteroid impact prediction is the prediction of the dates and times of asteroids impacting Earth, along with the locations and severities of the impacts.