Discovery | |
---|---|
Discovered by | Johann Palisa |
Discovery date | 8 October 1879 |
Designations | |
(204) Kallisto | |
Pronunciation | /kəˈlɪstoʊ/[1] |
Named after | Callisto |
A879 TA | |
Main belt | |
Adjectives | Kallistoan /kælɪˈstoʊən/ |
Orbital characteristics[2] | |
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) | |
Average orbital speed | 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[2] 50.36 ± 1.69 km[3] |
Mass | (0.60 ± 1.81) × 1018 kg[3] |
19.489 h (0.8120 d)[4] | |
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.[4]
Carry2012
was invoked but never defined (see the help page).Pilcher2010
was invoked but never defined (see the help page).