654 Zelinda

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654 Zelinda
Discovery
Discovered by August Kopff
Discovery site Heidelberg
Discovery date 4 January 1908
Designations
1908 BM
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 108.29 yr (39553 d)
Aphelion 2.8288 AU (423.18 Gm)
Perihelion 1.7653 AU (264.09 Gm)
2.2970 AU (343.63 Gm)
Eccentricity 0.23150
3.48 yr (1271.6 d)
51.9052°
0° 16m 59.196s / day
Inclination 18.125°
278.460°
214.008°
Earth MOID 0.802149 AU (119.9998 Gm)
Jupiter MOID 2.35594 AU (352.444 Gm)
Jupiter Tisserand parameter 3.494
Physical characteristics
Mean radius
63.70±1.95 km[1]
63.915 ± 2.615 km[2]
Mass (1.35 ± 0.14) × 1018 kg[2]
Mean density
1.23 ± 0.19 g/cm3[2]
31.735 h (1.3223 d)
0.0425±0.003
8.52

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.[3] 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.[4]

References[edit]

  1. ^ a b "654 Zelinda (1908 BM)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336free to read, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ Ostro, S. J.; et al. (October 1991), "Asteroid radar astrometry", Astronomical Journal, 102, pp. 1490–1502, Bibcode:1991AJ....102.1490O, doi:10.1086/115975. 
  4. ^ Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, 185 (1), pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456free to read, PMID 19081813, retrieved 2013-03-27. 

External links[edit]