89 (Number)

In mathematics

In science

• The atomic number of actinium.

• Messier object M89, a magnitude 11.5 elliptical galaxy in the constellation Virgo.
• The New General Catalogue object NGC 89, a magnitude 13.5 peculiar spiral galaxy in the constellation Phoenix and a member of Robert's Quartet.
• The Saros number of:
• the solar eclipse series which began on 18 February 4 and ended on 1316 March 24. The duration of Saros series 89 was 1298.1 years, and it contained 73 solar eclipses.
• the lunar eclipse series which began on 67 June 15 and ended on 1347 July 23. The duration of Saros series 89 was 1280.1 years, and it contained 72 lunar eclipses.

In other fields

• the model number of CBU-89 Gator, TI-89
• part of the name of the baseball team Oklahoma City 89ers (1962-1997)
• the number of the French department Yonne
• the designation of Interstate 89, a freeway that runs from New Hampshire to Vermont
• The ISBN Group Identifier for books published in Korea
• The year AD 89, 89 BC, or 1989.

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