990 Yerkes
Main-belt asteroid
990 Yerkes is a main belt asteroid discovered by Belgian-American astronomer George Van Biesbroeck in 1922, and named after the Yerkes Observatory.
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.[2]
References
- ^ "990 Yerkes (1922 MZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.
- ^ a b Ruthroff, John C. (April 2010), "Lightcurve Analysis of Asteroid 990 Yerkes", The Minor Planet Bulletin, 37 (2): 74, Bibcode:2010MPBu...37...74R.
External links
- 990 Yerkes at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 990 Yerkes at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
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- 989 Schwassmannia
- 990 Yerkes
- 991 McDonalda
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