(9698) Idzerda Main-belt Asteroid
Discovered on 25 March 1971 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Hanso Henricus Schotanus Steringa Idzerda (1885-1944) invented the vacuum triode for amplifying audio and radio signals. In November 1919 he started the first radio broadcasting station in the world from The Hague.Naming citation (20001111/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Idzerda is today
Seen from above the solar system on 2026-10-14: Idzerda is 2.36 au from the Sun and 2.68 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9698 |
| Provisional designation | 2205 T-1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.02 km (#12,677 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.228 |
| Rotation period | 5.48 hours |
| Absolute magnitude (H) | 14.16 |
| Orbital period | 3.64 years |
| Semi-major axis | 2.37 au |
| Perihelion – aphelion | 2.25 – 2.49 au |
| Eccentricity | 0.0504 |
| Inclination | 7.36° |
| Closest distance between its orbit and Earth's (MOID) | 1.25 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 25 March 1971
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- (5408) The
- (6072) Hooghoudt
- (6616) Plotinos
- (6617) Boethius
- (6673) Degas
- (6751) van Genderen
- (7148) Reinholdbien
- (7211) Xerxes
- (7314) Pevsner
- (7624) Gluck
- (7690) Sackler