990 Yerkes
990 Yerkes| Discovery |
|---|
| Discovered by |
G. Van Biesbroeck |
|---|
| Discovery site |
Williams Bay |
|---|
| Discovery date |
November 23, 1922 |
|---|
| Designations |
|---|
|
1922 MZ |
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| 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° |
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| Inclination |
8.780° |
|---|
|
354.119° |
|---|
|
8.903° |
|---|
| Physical characteristics |
|---|
|
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