Thomas J. Bopp (born October 15, 1949) is best known as co-discoverer of comet Hale–Bopp (with Alan Hale) in 1995.
 At the time of the comet discovery he was a manager at a construction materials factory and an amateur astronomer.
 On the night of July 22, Bopp was observing the sky with friends in the Arizona desert when he made the discovery.
 It was the first comet he had observed and he was using a borrowed, home-built telescope.
 Hale and Bopp both discovered the comet by chance at approximately the same time.
The Great Comet of 1811, formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, a record it held until the appearance of Comet Hale–Bopp in 1997.
 In October 1811, at its brightest, it displayed an apparent magnitude of 0, with an easily visible coma.
The Lakes Route is an alternate name for the Douglas Road, which was the first formally designated "road" into the Interior of British Columbia, Canada from its Lower Mainland area flanking the Lower Fraser River.
 Also known as the Douglas-Lillooet Trail or the Lillooet Trail (not to be confused with the Lillooet Cattle Trail, also called the Lillooet Trail), the route consisted of a series of wagon roads connected via lake travel in between.
 A variety of craft were use on the lakes, from steamboats to sail-driven rafts to, through the early 20th Century, diesel and other engines.
 Lake travel continued for commerce, passenger travel and heavy freight until after World War II.
Juke Girl is a 1942 drama film directed by Curtis Bernhardt and written by A.I. Bezzerides.
 The film stars Ann Sheridan and future President of the United States Ronald Reagan.
 The supporting cast includes Richard Whorf, George Tobias, Gene Lockhart, Alan Hale, Sr., Howard Da Silva, Donald MacBride, Faye Emerson, Willie Best, and Fuzzy Knight.
 The plot focuses on the plight of exploited farmers and farmworkers in the South.
The Great Impersonation is a 1921 American silent drama film directed by George Melford and written by Monte M. Katterjohn and E. Phillips Oppenheim.
 The film stars James Kirkwood, Sr., Ann Forrest, Winter Hall, Truly Shattuck, Fontaine La Rue, Alan Hale, Sr., and Bertram Johns.
 The film was released on October 9, 1921, by Paramount Pictures.
 It is not known whether the film currently survives, which suggests that it is a lost film.
Comet Hale–Bopp (formally designated C/1995 O1) is a comet that was perhaps the most widely observed of the 20th century, and one of the brightest seen for many decades.
Comet Hyakutake (] , formally designated C/1996 B2) is a comet, discovered on 31 January 1996, that passed very close to Earth in March of that year.
 It was dubbed The Great Comet of 1996; its passage near the Earth was one of the closest cometary approaches of the previous 200 years.
 Hyakutake appeared very bright in the night sky and was widely seen around the world.
 The comet temporarily upstaged the much anticipated Comet Hale–Bopp, which was approaching the inner Solar System at the time.
The Strawberry Blonde is a 1941 Warner Bros. feature film directed by Raoul Walsh, starring James Cagney and Olivia de Havilland, and featuring Rita Hayworth, Alan Hale, Jack Carson and George Tobias.
 The picture was nominated for an Academy Award in 1941 for Best Scoring of a Musical Picture and features songs such as "The Band Played On", "Bill Bailey", "Meet Me in St. Louis, Louie," "Wait Till The Sun Shines Nellie," and "Love Me and the World Is Mine."
 The title is most often listed beginning with the word The, but the film's posters and promotional materials call it simply Strawberry Blonde.
 Director Walsh remade the film in 1948 as "One Sunday Afternoon".
 Also this was a remake of "One Sunday Afternoon" (1933) with Gary Cooper.
Ed Hale is a writer, singer-songwriter-recording artist, musician, populist blogger of the long-running The Transcendence Diaries, social and political activist, and controversial YouTube star currently best known for his last solo album "Ballad On Third Avenue" and the three hit singles it produced, "I Walk Alone", "New Orleans Dreams" and "Scene in San Francisco", which all landed in the "Billboard" Top 40 Charts in the Adult Contemporary radio format, and for the eclectic critically acclaimed albums and hit singles of the band Ed Hale and The Transcendence.
 Hale was formerly known as Eddie Darling throughout the early 1990s, and is the lead singer of the popular American modern rock musical group Ed Hale and The Transcendence, formerly called Transcendence.
 He also performs, records and releases solo albums.
 He is currently signed to the Dying Van Gogh record label and the BMG subsidiary label Fieldhouse Music.
 Hale is frequently referred to as "The Ambassador" by fans and the press, a nickname given him by friend and video-gaming industry maven Michael Nichols due to Hale's penchant for global volunteer and diplomatic travel, exploring other cultures, and for singing in and speaking multiple languages.
 Along with his native English, Hale speaks Spanish, Portuguese, Italian, French, Hebrew and Persian.
is an American professional astronomer, best known for his co-discovery of Comet Hale–Bopp along with amateur astronomer Thomas Bopp.

Question: What was Alan Hale's best known co-discovery formally designated as? 
Answer: C/1995 O1