206 Hersilia

Hersilia (minor planet designation: 206 Hersilia) is a fairly large Main belt asteroid. It was discovered by C. H. F. Peters on October 13, 1879, in Clinton, New York. The asteroid was named after Hersilia, Roman wife of Romulus. It is classified as a primitive, dark carbon-rich C-type asteroid.

206 Hersilia
Discovery
Discovered byC. H. F. Peters
Discovery date13 October 1879
Designations
(206) Hersilia
Pronunciation/hərˈsɪliə/[1]
Named after
Hersilia
1961 WG, 1974 PM
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc136.34 yr (49798 d)
Aphelion2.84299 AU (425.305 Gm)
Perihelion2.63811 AU (394.656 Gm)
2.74055 AU (409.980 Gm)
Eccentricity0.037379
4.54 yr (1657.1 d)
17.99 km/s
348.975°
0° 13m 2.078s / day
Inclination3.77868°
145.169°
299.705°
Physical characteristics
Dimensions113 km
11.122 h (0.4634 d)
0.055
Temperatureunknown
C
8.68

    Measurements made with the IRAS observatory give a diameter of 101.72 ± 5.18 km and a geometric albedo of 0.06 ± 0.01. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 97.99 ± 7.40 km and a geometric albedo of 0.06 ± 0.02.[3]

    The last close earth transit was in November and December 2002.

    References
    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. "206 Hersilia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    3. Ryan, Erin Lee; et al. (April 2012), "The Kilometer-Sized Main Belt Asteroid Population as Revealed by Spitzer", arXiv:1204.1116 [astro-ph.EP].


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