| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery site | Heidelberg |
| Discovery date | 4 January 1908 |
| Designations | |
| (654) Zelinda | |
| 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 |
| 1,271.6 d (3.48 yr) | |
| 51.9052° | |
| 0° 16m 59.196s / day | |
| Inclination | 18.125° |
| 278.460° | |
| 214.008° | |
| Physical characteristics | |
| 63.70±1.95 km[1] 63.915±2.615 km[2] | |
| Mass | (1.35±0.14)×1018 kg[2] |
Meandensity | 1.23±0.19 g/cm3[2] |
| 31.735 h (1.3223 d) | |
| 0.0425±0.003 | |
| 8.52 | |
654 Zelinda is aminor planet orbiting theSun that was discovered on 4 January 1908 by German astronomerAugust Kopff. It is orbiting the Sun at a distance of2.297 AU with anorbital eccentricity of 0.23 and aperiod of 3.48 yr.[1] Theorbital plane isinclined at an angle of 18.1° to theplane 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 withradar from theArecibo Observatory at a distance of 0.89AU. The measuredradar cross-section was 2,200 km2.[3] Measurements made using theadaptive optics system at theW. M. Keck Observatory give a diameter estimate of 131 km. This is 13% smaller than the diameter estimated from theIRAS observatory measurements. It is roughly triangular in shape,[4] and spins with asynodic rotation period of31.735 h.
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