223 Rosa

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.

DiscoveredbyJohann Palisa

Discoverydate9 March 1882

MPCdesignation

(223) Rosa

Alternative designations

A882 EA, 1887 BA
1942 EL

Quick facts Discovery, Discovered by ...

223 Rosa

Lightcurve-base 3D-model of 223 Rosa.
Discovery
Discovered by	Johann Palisa
Discovery date	9 March 1882
Designations
MPC designation	(223) Rosa
Alternative designations	A882 EA, 1887 BA 1942 EL
Minor planet category	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)
Semi-major axis	3.09552 AU (463.083 Gm)
Eccentricity	0.11586
Orbital period (sidereal)	5.45 yr (1989.3 d)
Average orbital speed	16.94 km/s
Mean anomaly	309.511°
Mean motion	0° 10m 51.488s / day
Inclination	1.93552°
Longitude of ascending node	47.9276°
Argument of perihelion	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]
Synodic rotation period	20.283 h (0.8451 d)
Geometric albedo	0.0309±0.003
Spectral type	CP
Absolute magnitude (H)	9.68,[1] 9.72[3]

Close

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]