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Masaru Arai (新井 優, Arai Masaru, born 1952) is a Japanese amateur astronomer and a discoverer of minor planets and comets.

He is credited by the Minor Planet Center with the discovery of 45 minor planets during 1988–1991, all in collaboration with astronomer Hiroshi Mori. On 5 January 1991, he has also discovered Comet Arai, C/1991 A2.

The main-belt asteroid 21082 Araimasaru, discovered by Tsutomu Hioki and Shuji Hayakawa at Okutama in 1991, was named in his honor. Naming citation was published on 6 January 2003 (M.P.C. 47301).

List of discovered minor planets

References

1. ^ "Minor Planet Discoverers (by number)". Minor Planet Center. 16 November 2016. Retrieved 3 January 2017.
2. ^ Schmadel, Lutz D. (2006). "(21082) Araimasaru [2.57, 0.31, 6.0]". Dictionary of Minor Planet Names – (21082) Araimasaru, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-34361-5_1884. ISBN 978-3-540-34361-5.
3. "JPL Small-Body Database Browser: C/1991 A2 (Arai)". Jet Propulsion Laboratory. Retrieved 3 January 2017.
4. British Astronomical Association (2008). British Astronomical Association circular.
5. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 January 2017.

External links

• Yorii Observatory, instruments and discoveries (in Japanese)
• COMET ARAI (1991b), IAUC 5157, 7 January 1991
• COMET ARAI (1991b), IAUC 5170, 18 January 1991

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