204 Kallisto

204 Kallisto
Discovery
Discovered by Johann Palisa
Discovery date 8 October 1879
Designations
MPC designation (204) Kallisto
Named after
 Callisto
n/a
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 136.52 yr (49863 d)
Aphelion 3.13704 AU (469.295 Gm)
Perihelion 2.20244 AU (329.480 Gm)
2.66974 AU (399.387 Gm)
Eccentricity 0.17504
4.36 yr (1593.3 d)
18.22 km/s
230.567°
0° 13m 33.398s / day
Inclination 8.28673°
205.123°
55.4125°
Physical characteristics
Dimensions 48.57±1.2 km[1]
50.36 ± 1.69 km[2]
Mass (0.60 ± 1.81) × 1018 kg[2]
19.489 h (0.8120 d)[3]
0.2082±0.010
S
8.89

    204 Kallisto is a fairly typical, although sizeable Main belt asteroid. It is classified as an S-type asteroid. Like other asteroids of its type, it is light in colour. It was discovered by Johann Palisa on 8 October 1879, in Pola, and was named after the same nymph Callisto in Greek mythology as Jupiter's moon Callisto.

    Photometric measurements during 2009 produced a lightcurve that indicated a sidereal rotation period of 19.489±0.002 h with a variation amplitude of 0.18±0.02 magnitudes. This result conflicted with previous determinations of the period, so the latter were ruled out.[3]

    References

    1. 1 2 "204 Kallisto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    2. 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    3. 1 2 Pilcher, Frederick (January 2010), "Rotational Period Determination for 23 Thalia, 204 Kallisto and 207 Hedda, and Notes on 161 Athor and 215", The Minor Planet Bulletin, 37 (1): 21−23, Bibcode:2010MPBu...37...21P.


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