(198820) Iwanowska Main-belt Asteroid
Discovered on 13 March 2005 by Cernis, K., Zdanavicius, J. at Moletai.
Wilhelmina Iwanowska (1905–1999), distinguished Polish astronomer, worked at the Vilnius (1927–1940) and Toruń (1945–1999) universities and was the Vice-President of the IAU from 1973 to 1979. She was the first Director of the Institute of Astronomy of the Copernicus University in Toruń.Naming citation (WGSBN Bull. 6, #7, 5), IAU / Minor Planet Center, via NASA/JPL
Where Iwanowska is today
Seen from above the solar system on 2026-10-14: Iwanowska is 3.07 au from the Sun and 3.95 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 198820 |
| Provisional designation | 2005 ET249 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.36 km (#9,943 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Absolute magnitude (H) | 15.19 |
| Orbital period | 5.40 years |
| Semi-major axis | 3.08 au |
| Perihelion – aphelion | 2.75 – 3.40 au |
| Eccentricity | 0.105 |
| Inclination | 12.4° |
| Closest distance between its orbit and Earth's (MOID) | 1.79 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.