204 Kallisto

204 Kallisto

Discovery
Discovered by	Johann Palisa
Discovery date	8 October 1879
Designations
Named after	Callisto
Alternative names	n/a
Minor planet category	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)
Semi-major axis	2.66974 AU (399.387 Gm)
Eccentricity	0.17504
Orbital period	4.36 yr (1593.3 d)
Average orbital speed	18.22 km/s
Mean anomaly	230.567°
Mean motion	0° 13^m 33.398^s / day
Inclination	8.28673°
Longitude of ascending node	205.123°
Argument of perihelion	55.4125°
Earth MOID	1.19997 AU (179.513 Gm)
Jupiter MOID	1.94556 AU (291.052 Gm)
Jupiter Tisserand parameter	3.345
Physical characteristics
Dimensions	48.57±1.2 km[1] 50.36 ± 1.69 km[2]
Mass	(0.60 ± 1.81) × 10^18 kg[2]
Rotation period	19.489 h (0.8120 d)
Geometric albedo	0.2082±0.010
Spectral type	S
Absolute magnitude (H)	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.

The asteroid was named after the same nymph Callisto in Greek mythology as Jupiter's moon Callisto.

References

1. "204 Kallisto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
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.

External links

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Light-curve Parameters
• Asteroid Albedo Compilation
• 204 Kallisto at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters