321 Florentina

321 Florentina
	A three-dimensional model of 321 Florentina based on its light curve
Discovery
Discovered by	Johann Palisa
Discovery date	15 October 1891
Designations
MPC designation	(321) Florentina
Pronunciation	/flɒrənˈtaɪnə/
Minor planet category	Main belt (Koronis)
Orbital characteristics[1]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	118.15 yr (43153 d)
Aphelion	3.01879 AU (451.605 Gm)
Perihelion	2.7543 AU (412.04 Gm)
Semi-major axis	2.88657 AU (431.825 Gm)
Eccentricity	0.045806
Orbital period	4.90 yr (1791.3 d)
Mean anomaly	120.99°
Mean motion	0° 12m 3.492s / day
Inclination	2.5876°
Longitude of ascending node	40.224°
Argument of perihelion	37.310°
Physical characteristics
Dimensions	27.23±1.5 km
Rotation period	2.871 h (0.1196 d)
Geometric albedo	0.2296±0.028
Absolute magnitude (H)	10.1

Florentina (minor planet designation: 321 Florentina) is a typical Main belt asteroid.

It was discovered by Johann Palisa on 15 October 1891 in Vienna. He named the asteroid for his daughter, Florentine.[2] Between 1874 and 1923, Palisa discovered a total of 122 asteroids.

A group of astronomers, including Lucy d'Escoffier Crespo da Silva, contributed data toward the discovery of spin-vector alignments in the Koronis family, which includes (321) Florentina. This was based on observations made between 1998 through 2000. The collaborative work resulted in the creation of 61 new individual rotation lightcurves to augment previous published observations.[3]

References

"321 Florentina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
Schmadel, Lutz D. (2007). "(321) Florentina". Dictionary of Minor Planet Names – (321) Florentina. Springer Berlin Heidelberg. p. 42. doi:10.1007/978-3-540-29925-7_322. ISBN 978-3-540-00238-3.
Slivan, S. M., Binzel, R. P., Crespo da Silva, L. D., Kaasalainen, M., Lyndaker, M. M., Krco, M.: “Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves,”Icarus, 162, 2003, pp. 285-307.

External links

Lightcurve plot of 321 Florentina, Palmer Divide Observatory, B. D. Warner (1999)
Asteroid Lightcurve Database (LCDB), query form (info)
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
321 Florentina at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
321 Florentina at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[jpldata-1] "321 Florentina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.

[2] Schmadel, Lutz D. (2007). "(321) Florentina". Dictionary of Minor Planet Names – (321) Florentina. Springer Berlin Heidelberg. p. 42. doi:10.1007/978-3-540-29925-7_322. ISBN 978-3-540-00238-3.

[3] Slivan, S. M., Binzel, R. P., Crespo da Silva, L. D., Kaasalainen, M., Lyndaker, M. M., Krco, M.: “Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves,”Icarus, 162, 2003, pp. 285-307.