(4090) Risehvezd Main-belt Asteroid

Discovered on 2 September 1986 by A. Mrkos at Klet.

Named for Říše hvězd (the Realm of Stars), Czech popular journal for astronomy. Originally published by the Czech Astronomical Society in Prague, the journal has described new findings from astronomy, astrophysics and space exploration and provided information about Czech and Slovak amateur and professional astronomy for more than three-quarters of a century. Name suggested by J. Ticha, M. Tichy and Z. Moravec.Naming citation (19960828/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where Risehvezd is today

Seen from above the solar system on 2026-10-14: Risehvezd is 2.36 au from the Sun and 1.38 au from Earth. Computed from JPL's orbital elements.

Facts

Number	4090
Provisional designation	1986 RH1
Orbit class	Main-belt Asteroid
Diameter	7.20 km (#7,420 largest of 17,440 named asteroids with a measured size)
Albedo	0.149
Rotation period	4.55 hours
Absolute magnitude (H)	13.26
Orbital period	3.62 years
Semi-major axis	2.36 au
Perihelion – aphelion	1.86 – 2.85 au
Eccentricity	0.211
Inclination	1.33°
Closest distance between its orbit and Earth's (MOID)	0.843 au

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

Also discovered on 2 September 1986

More named asteroids discovered by A. Mrkos

All 217

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