155 Scylla

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155 Scylla
Discovery[1] and designation
Discovered by J. Palisa
Discovery date 1875
Designations
Minor planet category Main belt
Orbital characteristics[1]
Epoch August 27, 2011 (JD 2455800.5)
Aphelion 526.704 Gm (3.521 AU)
Perihelion 297.689 Gm (1.990 AU)
412.196 Gm (2.755 AU)
Eccentricity 0.278
1670.577 d (4.57 a)
17.59 km/s
205.590°
Inclination 11.394°
41.037°
Physical characteristics
Dimensions 49.5 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[2] h
0.10
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.[3]

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.[2]

References[edit]

  1. ^ Yeomans, Donald K., "155 Scylla", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25. 
  2. ^ a b Pilcher, Frederick; Jardine, Don (April 2009), "Period Determinations for 31 Euphrosyne, 35 Leukothea 56 Melete, 137 Meliboea, 155 Scylla, and 264 Libussa", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 36 (2): 52–54, Bibcode:2009MPBu...36...52P 
  3. ^ Hodgson, Richard G. (September 1976), "155 Scylla, 279 Thule, 944 Hidalgo, and 1620 Geographos: Four Challenges for Observation", The Minor Planet Bulletin 4: 7, Bibcode:1976MPBu....4....7H.