654 Zelinda

654 Zelinda
Discovery
Discovered by August Kopff
Discovery site Heidelberg
Discovery date January 4, 1908
Designations
1908 BM
Orbital characteristics
Epoch October 10, 1999 (JDCT 2451461.5)
Aphelion 2.829 AU
Perihelion 1.765 AU
2.297 AU
Eccentricity 0.232
3.481 a
113.367°
Inclination 18.118°
278.612°
214.078°
Physical characteristics
Dimensions 127.83 ± 5.23[1] km
Mass (1.35 ± 0.14) × 1018[1] kg
Mean density
 1.23 ± 0.19[1] g/cm3

    654 Zelinda is a minor planet orbiting the Sun that was discovered on January 4, 1908 by German astronomer August Kopff. On favorable oppositions, it can be as bright as magnitude 10.0, as on January 30, 2016.

    In 1988, this object was detected with radar from the Arecibo Observatory at a distance of 0.89 AU. The measured radar cross-section was 2,200 km2.[2] Measurements made using the adaptive optics system at the W. M. Keck Observatory give a diameter estimate of 131 km. This is 13% smaller than the diameter estimated from the IRAS observatory measurements. It is roughly triangular in shape.[3]

    References

    1. ↑ 1.0 1.1 1.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    2. ↑ Ostro, S. J. et al. (October 1991), "Asteroid radar astrometry", Astronomical Journal 102: 1490–1502, Bibcode:1991AJ....102.1490O, doi:10.1086/115975.
    3. ↑ Marchis, F. et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus 185 (1): 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 2013-03-27.

    External links