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683 Lanzia
	A three-dimensional model of 683 Lanzia based on its light curve
Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg
Discovery date	23 July 1909
Designations
MPC designation	(683) Lanzia
Alternative designations	1909 HC
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	101.75 yr (37,164 d)
Aphelion	3.2891 AU (492.04 Gm)
Perihelion	2.9402 AU (439.85 Gm)
Semi-major axis	3.1146 AU (465.94 Gm)
Eccentricity	0.056013
Orbital period (sidereal)	5.50 yr (2007.7 d)
Mean anomaly	278.966°
Mean motion	0° 10m 45.516s / day
Inclination	18.509°
Longitude of ascending node	259.724°
Argument of perihelion	283.703°
Physical characteristics
Mean radius	41.52±11.1 km
Synodic rotation period	8.630 h (0.3596 d)
Geometric albedo	0.1474±0.128
Absolute magnitude (H)	8.7

683 Lanzia is a minor planet orbiting the Sun. It was discovered July 23, 1909, by Max Wolf at the Landessternwarte Heidelberg-Königstuhl observatory^[2] and was named in honor of Lanz, founder of the Heidelberg Academy of Sciences. Photometric observations made in 2003 at the Santana Observatory in Rancho Cucamonga, California, give a synodic rotation period of 8.63 ± 0.005 hours. The light curve shows a brightness variation of 0.15 ± 0.04 in magnitude.^[2]

Observations during two last occultation 18 and 22 December 2010 (P.Baruffetti, G. Tonlorenzi - Massa, G. Bonatti - Carrara, R. Di Luca - Bologna (Italy), C. Schnabel - S. Estebe, J. Rovira - Moja (Spain)) measured a 122.5 km diameter (medium) and an Albedo of 0.0705 compatible with carbonaceous asteroids (C group).

References

^ "683 Lanzia (1909 HC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
^ ^a ^b Stephens, Robert D. (March 2004), "Photometry of 683 Lanzia, 1101 Clematis, 1499 Pori, 1507 Vaasa, and 3893 DeLaeter", The Minor Planet Bulletin, vol. 31, no. 1, pp. 4–6, Bibcode:2004MPBu...31....4S.

External links

683 Lanzia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
683 Lanzia at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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[jpldata-1] "683 Lanzia (1909 HC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.

[Stephens2004-2] Stephens, Robert D. (March 2004), "Photometry of 683 Lanzia, 1101 Clematis, 1499 Pori, 1507 Vaasa, and 3893 DeLaeter", The Minor Planet Bulletin, vol. 31, no. 1, pp. 4–6, Bibcode:2004MPBu...31....4S.

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