(7128) Misawa Main-belt Asteroid

Discovered on 30 September 1991 by Endate, K., Watanabe, K. at Kitami.

Named in memory of Katsue Misawa (1885-1937). Although he received only a limited education, through his own efforts he became a junior-high-school geography teacher. His unique teaching practices are highly appreciated in the history of Japanese education. In astronomy, he was the real pioneer of sunspot observation in Japan, systematically observing sunspots from 1921 until 1934, when failing eyesight prevented it. His data were invaluable because in those days foreign data arrived in Japan only after a long delay. Name proposed by the discoverers following a suggestion by K. Gomi, T. Sato, K. Fujimori and A. Fujii.Naming citation (19990402/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where Misawa is today

Seen from above the solar system on 2026-10-14: Misawa is 3.65 au from the Sun and 4.12 au from Earth. Computed from JPL's orbital elements.

Facts

Number	7128
Provisional designation	1991 SM1
Orbit class	Main-belt Asteroid
Diameter	13.8 km (#3,450 largest of 17,440 named asteroids with a measured size)
Albedo	0.0850
Absolute magnitude (H)	12.96
Orbital period	5.57 years
Semi-major axis	3.14 au
Perihelion – aphelion	2.52 – 3.77 au
Eccentricity	0.198
Inclination	2.75°
Closest distance between its orbit and Earth's (MOID)	1.51 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

Also discovered on 30 September 1991

More named asteroids discovered by Endate, K., Watanabe, K.

All 535

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