 Animation of JUICE around the Sun Sun · Earth · JUICE · Venus · 223 Rosa · Jupiter | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 9 March 1882 |
| Designations | |
| (223) Rosa | |
| A882 EA, 1887 BA 1942 EL | |
| Main belt (Themis) | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.29 yr (47590 d) |
| Aphelion | 3.45415 AU (516.733 Gm) |
| Perihelion | 2.73689 AU (409.433 Gm) |
| 3.09552 AU (463.083 Gm) | |
| Eccentricity | 0.11586 |
| 5.45 yr (1989.3 d) | |
Average orbital speed | 16.94 km/s |
| 309.511° | |
| 0° 10m 51.488s / day | |
| Inclination | 1.93552° |
| 47.9276° | |
| 61.7716° | |
| Physical characteristics | |
Mean diameter | 82.7±8.4 km[2] |
| Mass | (5.979±2.971)×1017 kg[2] |
Mean density | 1.790±50% g/cm3[2] |
| 20.283 h (0.8451 d) | |
| 0.0309±0.003 | |
| CP | |
| 9.68,[1] 9.72[3] | |
Rosa (minor planet designation: 223 Rosa) is a large Themistian asteroid. It is classified as a combination of C-type and P-type asteroids, so it is probably composed of carbonaceous material rich in water ice. It was discovered by Johann Palisa on 9 March 1882, in Vienna. The origin of the name is not known.
Photometric observations made in 2011–2012 at the Organ Mesa Observatory in Las Cruces, New Mexico, produced a light curve with a period of 20.283 ± 0.002 hours and a brightness variation of 0.13 ± 0.02 in magnitude. The curve has two asymmetrical maxima and minima per 20.283-hour cycle.[4]
A flyby of Rosa by the JUICE spacecraft, which is planned to pass through the asteroid belt twice, was proposed to occur on 15 October 2029.[2] However, the mission team ultimately decided against the proposed flyby to maximize fuel for the primary mission.[5]
