(3905) Doppler Main-belt Asteroid

Discovered on 28 August 1984 by A. Mrkos at Klet.

Named in memory of the Austrian physicist Christian Doppler (1803–1853), professor of mathematics and geometry at the Technical University in Prague and later the first director of the Physical Institute in Vienna. The well-known effect relating a shift in observed wavelength to the relative motion of source and observer was formulated by Doppler in Prague in his book Über das farbige Licht der Doppelsterne und einiger anderer Gestirne des Himmels (1842). Name suggested by J. Tichá and M. Šolc.Naming citation (WGSBN Bull. 4, #12, 4), IAU / Minor Planet Center, via NASA/JPL

🐶 Doppler as a dog name

Where Doppler is today

Seen from above the solar system on 2026-10-14: Doppler is 2.15 au from the Sun and 2.77 au from Earth. Computed from JPL's orbital elements.

Facts

Number	3905
Provisional designation	1984 QO
Orbit class	Main-belt Asteroid
Diameter	8.02 km (#6,559 largest of 17,440 named asteroids with a measured size)
Albedo	0.228
Rotation period	50.8 hours
Absolute magnitude (H)	12.9
Orbital period	4.10 years
Semi-major axis	2.56 au
Perihelion – aphelion	1.91 – 3.21 au
Eccentricity	0.255
Inclination	14.2°
Closest distance between its orbit and Earth's (MOID)	0.982 au

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

Also named after someone called Christian

All asteroids named after someone called Christian

Also discovered on 28 August 1984

More named asteroids discovered by A. Mrkos

All 217

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