(7681) Chenjingrun Main-belt Asteroid

Discovered on 24 December 1996 by Beijing Schmidt CCD Asteroid Program at Xinglong.

Named in memory of Jingrun Chen (1933-1996), member of the Chinese Academy of Sciences and superior research professor at the Mathematical Institute of the Chinese Academy of Sciences. He obtained brilliant results in the field of modern analytical number theory, notably “Chen's Theorem”, which is concerned with the Goldbach conjecture.Naming citation (19990728/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where Chenjingrun is today

Seen from above the solar system on 2026-10-14: Chenjingrun is 2.48 au from the Sun and 3.12 au from Earth. Computed from JPL's orbital elements.

Facts

Number	7681
Provisional designation	1996 YK2
Orbit class	Main-belt Asteroid
Diameter	8.98 km (#5,775 largest of 17,440 named asteroids with a measured size)
Albedo	0.0600
Rotation period	555 hours
Absolute magnitude (H)	14.36
Orbital period	3.57 years
Semi-major axis	2.34 au
Perihelion – aphelion	1.98 – 2.69 au
Eccentricity	0.153
Inclination	7.61°
Closest distance between its orbit and Earth's (MOID)	1.00 au

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

Also discovered on 24 December 1996

(11637) Yangjiachi

More named asteroids discovered by Beijing Schmidt CCD Asteroid Program

All 157

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