(9841) Masek Main-belt Asteroid
Discovered on 18 October 1988 by Z. Vavrova at Klet.
Martin Mašek (b. 1988) is an avid observer of deep-sky objects, variable stars, comets and asteroids. He follows up and confirms NEOCP objects from southern sky remotely via a robotic telescope at Pierre Auger Observatory, Argentina. He is also discoverer of several variable stars.Naming citation (MPC batch dated 2015-09-28), IAU / Minor Planet Center, via NASA/JPL
Where Masek is today
Seen from above the solar system on 2026-10-14: Masek is 2.36 au from the Sun and 2.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9841 |
| Provisional designation | 1988 UT |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.74 km (#15,776 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.235 |
| Absolute magnitude (H) | 15.1 |
| Orbital period | 3.24 years |
| Semi-major axis | 2.19 au |
| Perihelion – aphelion | 1.84 – 2.54 au |
| Eccentricity | 0.160 |
| Inclination | 2.20° |
| Closest distance between its orbit and Earth's (MOID) | 0.848 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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