Discovered by G. Van Biesbroeck Alternative names 1922 MZ Aphelion 3.2477 AU (485.85 Gm) Discovered 23 November 1922 Orbits Sun Discovery site Yerkes Observatory | Discovery date 23 November 1922 Observation arc 102.46 yr (37425 days) Perihelion 2.0916 AU (312.90 Gm) Absolute magnitude 11.7 Discoverer George Van Biesbroeck Asteroid group Asteroid belt | |
Similar 528 Rezia, 540 Rosamunde, 509 Iolanda, 625 Xenia, 679 Pax | ||
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.
References
990 Yerkes Wikipedia(Text) CC BY-SA