155 Scylla
| Discovery | |
|---|---|
| Discovered by | J. Palisa |
| Discovery date | 8 November 1875 |
| Designations | |
| MPC designation | (155) Scylla |
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 140.43 yr (51293 d) |
| Aphelion | 3.5210 AU (526.73 Gm) |
| Perihelion | 1.99069 AU (297.803 Gm) |
| 2.75584 AU (412.268 Gm) | |
| Eccentricity | 0.27764 |
| 4.57 yr (1671.0 d) | |
|
Average orbital speed
|
17.59 km/s |
| 233.652° | |
| 0° 12m 55.584s / day | |
| Inclination | 11.388° |
| 41.000° | |
| 45.887° | |
| Earth MOID | 1.02278 AU (153.006 Gm) |
| Jupiter MOID | 1.85934 AU (278.153 Gm) |
| Jupiter Tisserand parameter | 3.259 |
| Physical characteristics | |
| Dimensions | 39.9 km |
| Mass | 1.3×1017 kg |
|
Mean density
|
2.0 g/cm³ |
|
Equatorial surface gravity
|
0.0138 m/s² |
|
Equatorial escape velocity
|
0.0262 km/s |
| 7.9597 h (0.33165 d) | |
| 0.0309±0.007 | |
| Temperature | ~168 K |
| 11.39 | |
155 Scylla is a main belt asteroid. It was discovered by Austrian astronomer J. Palisa on November 8, 1875, and named after the monster Scylla in Greek mythology. Two weeks after its discovery this asteroid became lost and was not recovered for 95 years. It was finally found by Paul Wild of Berne, Switzerland with the aid of an ephemeris created in 1970 by Conrad M. Bardwell at Cincinnati Observatory.
Photometric observations of this asteroid during 2008 at the Organ Mesa Observatory in Las Cruces, New Mexico, gave an asymmetrical, bimodal light curve with a period of 7.9597 ± 0.0001 hours and a brightness variation of 0.46 ± 0.03 in magnitude.
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