111 Ate

Ate (minor planet designation: 111 Ate) is a main-belt asteroid that was discovered by the German-American astronomer C. H. F. Peters on August 14, 1870,[6] and named after Ate, the goddess of mischief and destruction in Greek mythology. In the Tholen classification system, it is categorized as a carbonaceous C-type asteroid, while the Bus asteroid taxonomy system lists it as an Ch asteroid.[5]

111 Ate
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date14 August 1870
Designations
(111) Ate
Pronunciation/ˈeɪtiː/[1]
1935 AA, A911 KE
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc145.66 yr (53202 d)
Aphelion2.8614 AU (428.06 Gm)
Perihelion2.32553 AU (347.894 Gm)
2.59349 AU (387.981 Gm)
Eccentricity0.10332
4.18 yr (1525.5 d)
18.44 km/s
190.607°
0° 14m 9.532s / day
Inclination4.9318°
305.757°
166.424°
Earth MOID1.34088 AU (200.593 Gm)
Jupiter MOID2.23131 AU (333.799 Gm)
TJupiter3.406
Physical characteristics
Dimensions134.55±4.6 km[2]
142.85 ± 5.94 km[3]
Mass(1.76 ± 0.44) × 1018 kg[3]
Mean density
1.15 ± 0.32 g/cm3[3]
Equatorial surface gravity
0.0376 m/s²
Equatorial escape velocity
0.0712 km/s
22.072 h (0.9197 d)[2]
22.072 ± 0.001 h[4]
0.0605±0.004
Temperature~173 K
C[5]
8.02

    Two stellar occultations by Ate were observed in 2000, only two months apart. The occultation of the star HIP 2559 by 111 Ate was used to determine a chord length of 125.6 ± 7.2 km through the asteroid, giving a lower bound on the maximum dimension.[7] During 2000, 111 Ate was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 135 ± 15 km.[8] The estimated size of this asteroid is 143[3] km, making it one of the larger asteroids.

    Based upon an irregular light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 22.072 ± 0.001 hours and varies in brightness by 0.12 ± 0.01 in magnitude.[4]

    References
    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. Yeomans, Donald K., "111 Ate", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    4. Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin, 38 (4), pp. 183–185, Bibcode:2011MPBu...38..183P.
    5. DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1), pp. 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
    6. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    7. Devyatkin, A. V.; et al. (November 2008), "Photometric observations of solar system bodies with ZA-320M automatic mirror astrograph in Pulkovo observatory", Planetary and Space Science, 56 (14), pp. 1888–1892, Bibcode:2008P&SS...56.1888D, doi:10.1016/j.pss.2008.02.014. See Table 1.
    8. Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003", Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018

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