223 Rosa

223 Rosa

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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° 10^m 51.488^s / 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)×10^17 kg[2]
Mean density	1.790±50% g/cm^3[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]

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]

References

1. Yeomans, Donald K., "223 Rosa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
2. Avdellidou, C.; Pajola, M.; Lucchetti, A.; Agostini, L.; Delbo, M.; Mazzotta Epifani, E.; Bourdelle De Micas, J.; Devogèle, M.; Fornasier, S.; Van Belle, G.; Bruot, N.; Dotto, E.; Ieva, S.; Cremonese, G.; Palumbo, P. (2021). "Characterisation of the main belt asteroid (223) Rosa". Astronomy & Astrophysics. 656: L18. Bibcode:2021A&A...656L..18A. doi:10.1051/0004-6361/202142600. hdl:11577/3460828. S2CID 244753425.
3. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, vol. 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
4. Pilcher, Frederick (July 2012), "Rotation Period Determinations for 46 Hestia, 223 Rosa, 225 Henrietta, 266 Aline, 750 Oskar, and 765 Mattiaca", The Minor Planet Bulletin, vol. 39, no. 3, pp. 171–173, Bibcode:2012MPBu...39..171P.
5. European Space Agency [@ESA_JUICE] (14 December 2023). "🧃 Time for another visit to the #ESAJuice bar 😉 At 8% of the way to Jupiter, we have an update on our journey. We had been considering slightly diverting Juice to visit an asteroid en route to #Jupiter. To maximise fuel for our main mission (the tour around the gas giant and its icy moons), we have decided against this asteroid flyby" (Tweet) – via Twitter.

External links

• Lightcurve plot of 223 Rosa, Palmer Divide Observatory, B. D. Warner (2007)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 223 Rosa at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 223 Rosa at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters