(29555) MACEK Main-belt Asteroid

Discovered on 18 February 1998 by Tichy, M., Moravec, Z. at Klet.

A partial anagram of the Czech word for microaccelerometer, MACEK was designed under the leadership of the Astronomical Institute of the Czech Academy of Sciences to measure extremely low levels of acceleration on board artificial satellites. Its performance has been proven aboard Space Shuttle STS-79.Naming citation (20031110/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where MACEK is today

Seen from above the solar system on 2026-10-14: MACEK is 3.56 au from the Sun and 4.38 au from Earth. Computed from JPL's orbital elements.

Facts

Number	29555
Provisional designation	1998 DP
Orbit class	Main-belt Asteroid
Diameter	22.9 km (#1,864 largest of 17,440 named asteroids with a measured size)
Albedo	0.0530
Rotation period	33.6 hours
Absolute magnitude (H)	12.21
Orbital period	5.62 years
Semi-major axis	3.16 au
Perihelion – aphelion	2.76 – 3.56 au
Eccentricity	0.127
Inclination	13.9°
Closest distance between its orbit and Earth's (MOID)	1.77 au

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

Also discovered on 18 February 1998

More named asteroids discovered by Tichy, M., Moravec, Z.

All 53

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