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654 Zelinda

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654 Zelinda
Discovery
Discovered byAugust Kopff
Discovery siteHeidelberg
Discovery date4 January 1908
Designations
MPC designation(654) Zelinda
Alternative designations1908 BM
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc108.29 yr (39553 d)
Aphelion2.8288 AU (423.18 Gm)
Perihelion1.7653 AU (264.09 Gm)
Semi-major axis2.2970 AU (343.63 Gm)
Eccentricity0.23150
Orbital period (sidereal)1,271.6 d (3.48 yr)
Mean anomaly51.9052°
Mean motion0° 16 59.196 / day
Inclination18.125°
Longitude of ascending node278.460°
Argument of perihelion214.008°
Physical characteristics
Mean radius63.70±1.95 km
63.915±2.615 km
Mass(1.35±0.14)×10 kg
Mean density1.23±0.19 g/cm
Synodic rotation period31.735 h (1.3223 d)
Geometric albedo0.0425±0.003
Absolute magnitude (H)8.52

654 Zelinda is a minor planet orbiting the Sun that was discovered on 4 January 1908 by German astronomer August Kopff. It is orbiting the Sun at a distance of 2.297 AU with an orbital eccentricity of 0.23 and a period of 3.48 yr. The orbital plane is inclined at an angle of 18.1° to the plane of the ecliptic. On favorable oppositions, it can be as bright as magnitude 10.0, as observed 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 km. 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, and spins with a synodic rotation period of 31.735 h.

References

  1. ^ "654 Zelinda (1908 BM)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016.
  2. ^ Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, 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, vol. 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, vol. 185, no. 1, pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 27 March 2013.

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