Astronomy:204 Kallisto
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Short description: Main-belt asteroid
 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 8 October 1879 |
| Designations | |
| (204) Kallisto | |
| Pronunciation | /kəˈlɪstoʊ/[1] |
| Named after | Callisto |
| A879 TA | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 3.13704 astronomical unit|AU (469.295 Gm) |
| |{{{apsis}}}|helion}} | 2.20244 AU (329.480 Gm) |
| 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° 13m 33.398s / day |
| Inclination | 8.28673° |
| Longitude of ascending node | 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] |
| Rotation period | 19.489 h (0.8120 d)[4] |
| Geometric albedo | 0.2082±0.010 |
| S | |
| Absolute magnitude (H) | 8.89 |
Kallisto (minor planet designation: 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]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 "204 Kallisto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=204;cad=1.
- ↑ 3.0 3.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 4.0 4.1 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
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Light-curve Parameters
- Asteroid Albedo Compilation
- 204 Kallisto at AstDyS-2, Asteroids—Dynamic Site
- 204 Kallisto at the JPL Small-Body Database
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