View source for 111 Ate

{{Short description|Main-belt asteroid}}
{{Other uses|Ate (disambiguation)}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
 | minorplanet=yes
 | background=#D6D6D6
 | name=111 Ate
 |image= Орбита астероида 111.png
|caption=Orbital diagram
 | discoverer=[[Christian Heinrich Friedrich Peters]]
 | discovered=14 August 1870
 | mpc_name=(111) Ate
 | alt_names=A870 PA; 1911 KE;<br/>1935 AA
 | pronounced={{IPAc-en|'|eɪ|t|iː}}<ref>Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
 | mp_category=[[Main belt]]
 | epoch=31 July 2016 ([[Julian day|JD]] 2457600.5)
 | orbit_ref=<ref name="JPL"/>
 | semimajor={{Convert|2.59349|AU|Gm|abbr=on}}
 | perihelion={{Convert|2.32553|AU|Gm|abbr=on}}
 | aphelion={{Convert|2.8614|AU|Gm|abbr=on|lk=on}}
 | eccentricity=0.10332
 | period=4.18 [[Julian year (astronomy)|yr]] (1525.5 [[Julian year (astronomy)|d]])
 | inclination=4.9318°
 | asc_node=305.757°
 | arg_peri=166.424°
 | mean_anomaly=190.607[[Degree (angle)|°]]
 | avg_speed=18.44 km/s
 | dimensions={{val|126.34||0.23|ul=km}}<ref name="JPL"/><br />142.85 ± 5.94 km<ref name="Carry2012"/>
 | mass={{nowrap|(1.76 ± 0.44) × 10<sup>18</sup> kg<ref name="Carry2012"/>}}
 | density=1.15 ± 0.32 g/cm<sup>3</sup><ref name="Carry2012"/>
 | surface_grav=0.0376 m/s²
 | escape_velocity=0.0712 km/s
 | rotation={{Convert|22.072|h|d|abbr=on|lk=on}}<ref name="JPL"/><br />22.072 ± 0.001 h<ref name="Pilcher2011"/>
 | spectral_type=[[C-type asteroid|C]]<ref name="DeMeo2009"/>
 | abs_magnitude=8.02
 | albedo={{val|0.0605|0.004}}
 | single_temperature=~173 [[kelvin|K]]
 | mean_motion={{Deg2DMS|0.235981|sup=ms}} / day
 | observation_arc=145.66 yr (53202 d)
 | uncertainty=0
 | moid={{Convert|1.34088|AU|Gm|abbr=on}}
 | jupiter_moid={{Convert|2.23131|AU|Gm|abbr=on}}
 | tisserand=3.406
 |named_after=[[Ate (mythology)|Ate]]
}}

'''111 Ate''' is a [[main-belt]] [[asteroid]] discovered by the German-American astronomer [[Christian Heinrich Friedrich Peters|C. H. F. Peters]] on August 14, 1870,<ref name="IAU_MPC"/> and named after [[Atë|Ate]], the goddess of mischief and destruction in [[Greek mythology]]. In the [[Tholen classification]] system, it is categorized as a [[carbon]]aceous [[C-type asteroid]], while the Bus [[asteroid taxonomy]] system lists it as an Ch asteroid.<ref name="DeMeo2009"/>

Two [[star|stellar]] [[occultation]]s by Ate were observed in 2000, two [[month]]s apart. Its occultation of the star HIP 2559 was used to determine a chord length of 125.6 ± 7.2&nbsp;km through the asteroid, giving a lower bound on the maximum dimension.<ref name="Devyatkin2008"/> During 2000, 111 Ate was observed by radar from the [[Arecibo Observatory]]. The return signal matched an effective diameter of 135 ± 15&nbsp;km.<ref name="icarus186_1_126"/> The estimated size of this asteroid is 143&nbsp;km,<ref name="Carry2012"/> making it one of [[Largest asteroids|the larger asteroids]].

Based upon an irregular [[light curve]] generated from [[Photometry (astronomy)|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 (astronomy)|magnitude]].<ref name="Pilcher2011"/>

== References ==
{{Reflist|refs=

<ref name="IAU_MPC">{{Citation
 | title     = Numbered Minor Planets 1–5000
 | work      = Discovery Circumstances
 | publisher = IAU Minor Planet center
 | url       = https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html
 | accessdate= 2013-04-07
 | postscript= .}}</ref>

<ref name="JPL">{{Citation
 | first1    = Donald K.
 | last1     = Yeomans
 | title     = 111 Ate
 | work      = JPL Small-Body Database Browser
 | publisher = [[NASA Jet Propulsion Laboratory]]
 | url       = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=111
 | accessdate= 12 May 2016
 | postscript= .}}</ref>

<ref name="Pilcher2011">{{Citation
 | first1    = Frederick
 | last1     = Pilcher
 | title     = Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana
 | work      = The Minor Planet Bulletin
 | volume    = 38
 | issue     = 4
 | pages      = 183–185
 |date=October 2011
 | bibcode   = 2011MPBu...38..183P
 | postscript= .}}</ref>

<ref name="Carry2012">{{Citation
 | first1    = B.
 | last1     = Carry
 | title     = Density of asteroids
 | work      = Planetary and Space Science
 | volume    = 73
 | pages      = 98–118
 |date=December 2012
 | doi       = 10.1016/j.pss.2012.03.009
 | bibcode   = 2012P&SS...73...98C
 | postscript= .
|arxiv = 1203.4336 }} See Table 1.</ref>

<ref name="Devyatkin2008">{{Citation
 | first1    = A. V.
 | last1     = Devyatkin
 | first2    = D. L.
 | last2     = Gorshanov
 | first3    = E. Yu.
 | last3     = Aleshkina
 | display-authors = 1
 | title     = Photometric observations of solar system bodies with ZA-320M automatic mirror astrograph in Pulkovo observatory
 | work      = Planetary and Space Science
 | volume    = 56
 | issue     = 14
 | pages      = 1888–1892
 |date=November 2008
 | doi       = 10.1016/j.pss.2008.02.014
 | bibcode   = 2008P&SS...56.1888D
 | postscript= .}} See Table 1.</ref>

<ref name="icarus186_1_126">{{citation
 | last1=Magri
 | first1=Christopher
 | last2=Nolan
 | first2=Michael C.
 | last3=Ostro
 | first3=Steven J.
 | last4=Giorgini
 | first4=Jon D.
 | display-authors=1
 | title=A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003
 | journal=Icarus
 | volume=186
 | issue=1
 | pages=126–151
 |date=January 2007
 | doi=10.1016/j.icarus.2006.08.018
 | bibcode=2007Icar..186..126M}}</ref>

<ref name="DeMeo2009">{{Citation
 |last1           = DeMeo
 |first1          = Francesca E.
 |last2           = Binzel
 |first2          = Richard P.
 |last3           = Slivan
 |first3          = Stephen M.
 |last4           = Bus
 |first4          = Schelte J.
 |display-authors = 1
 |title           = An extension of the Bus asteroid taxonomy into the near-infrared
 |work            = Icarus
 |volume          = 202
 |issue           = 1
 |pages           = 160–180
 |date            = July 2009
 |doi             = 10.1016/j.icarus.2009.02.005
 |bibcode         = 2009Icar..202..160D
 |url             = http://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016%252Fj.icarus.2009.02.005.pdf
 |accessdate      = 2013-04-08
 |postscript      = .
 |url-status         = dead
 |archiveurl      = https://web.archive.org/web/20140317200310/https://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016/j.icarus.2009.02.005.pdf
 |archivedate     = 2014-03-17
 }} See appendix A.</ref>

}} <!-- end of reflist -->

== External links ==
* {{AstDys|111}}
* {{JPL small body}}

{{Minor planets navigator |110 Lydia |number=111 |112 Iphigenia}}
{{Small Solar System bodies}}
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{{DEFAULTSORT:Ate}}
[[Category:Background asteroids|000111]]
[[Category:Discoveries by Christian Peters]]
[[Category:Named minor planets]]
[[Category:C-type asteroids (Tholen)|000111]]
[[Category:Ch-type asteroids (SMASS)|000111]]
[[Category:Astronomical objects discovered in 1870|18700814]]