654 Zelinda is a minor planet orbiting the Sun that was discovered on 4 January 1908 by German astronomer August Kopff. On favorable oppositions, it can be as bright as magnitude 10.0, as on January 30, 2016.
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 |
3.48 yr (1271.6 d) | |
51.9052° | |
0° 16m 59.196s / day | |
Inclination | 18.125° |
278.460° | |
214.008° | |
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 | |
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]