204 Kallisto

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
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 October 8, 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[edit]

  1. ^ a b "204 Kallisto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016. 
  2. ^ a b Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b 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. 

External links[edit]