990 Yerkes
From Infogalactic: the planetary knowledge core
| Discovery | |
|---|---|
| Discovered by | G. Van Biesbroeck |
| Discovery site | Williams Bay |
| Discovery date | November 23, 1922 |
| Designations | |
| 1922 MZ | |
| Orbital characteristics | |
| Epoch August 18, 2005 (JDCT 2453600.5) | |
| Aphelion | 3.246 AU |
| Perihelion | 2.091 AU |
| 2.668 AU | |
| Eccentricity | 0.216 |
| 4.359 a | |
| 33.588° | |
| Inclination | 8.780° |
| 354.119° | |
| 8.903° | |
| Physical characteristics | |
|
Sidereal rotation period
|
24.45 ± 0.05[1] h |
990 Yerkes is a main belt asteroid discovered by Belgian-American astronomer George Van Biesbroeck in 1922.
Photometric observations of this asteroid collected during 2009 show a rotation period of 24.45 ± 0.05 hours with a brightness variation of 0.35 ± 0.05 magnitude.[1]
References
External links
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