# 266 Aline

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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
 | minorplanet=yes
 | background=#D6D6D6
 | name=266 Aline
  |image=266 Aline orbit on 01 Jan 2009.png
|image_scale=
|caption=Orbit of Aline
| discoverer=[Johann Palisa](/source/Johann_Palisa)
 | discovered=17 May 1887
 | mpc_name=(266) Aline
 | alt_names=A887 KA
 | mp_category=[Main belt](/source/Asteroid_belt)
 | epoch=31 July 2016 ([JD](/source/Julian_day) 2457600.5)
 | semimajor={{Convert|2.80394|AU|Gm|abbr=on}}
 | perihelion={{Convert|2.36559|AU|Gm|abbr=on}}
 | aphelion={{Convert|3.24229|AU|Gm|abbr=on|lk=on}}
 | eccentricity=0.15633
 | period=4.70 [yr](/source/Julian_year_(astronomy)) (1715.0 [d](/source/Julian_year_(astronomy)))
 | inclination=13.3989°
 | asc_node=235.904°
 | arg_peri=150.489°
 | mean_anomaly=53.2036[°](/source/Degree_(angle))
 | avg_speed=17.79 km/s
 | dimensions={{val|109.09|2.9|ul=km}}<ref name="jpldata"/><br />107.95 ± 6.62 km<ref name="Carry2012"/>
 | mass={{nowrap|(4.15 ± 0.42) × 10<sup>18</sup> kg<ref name="Carry2012"/>}}
 | density=6.29 ± 1.32 g/cm<sup>3</sup><ref name="Carry2012"/>
 | rotation={{Convert|13.018|h|d|abbr=on|lk=on}}<ref name="jpldata"/><br />13.02 h<ref name="Pilcher2012"/>
 | spectral_type=[C](/source/C-type_asteroid)
 | abs_magnitude=8.80
 | albedo={{val|0.0448|0.003}}
 | mean_motion={{Deg2DMS|0.209919|sup=ms}} / day
 | orbit_ref=<ref name="jpldata">{{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=266;cad=1 |title=266 Aline |work=[JPL Small-Body Database](/source/JPL_Small-Body_Database) |publisher=[NASA](/source/NASA)/[Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory) |access-date=11 May 2016}}</ref>
 | observation_arc=124.91 yr (45623 d)
 | uncertainty=0
}}

'''266 Aline''' is a fairly large [main belt](/source/Asteroid_belt) [asteroid](/source/asteroid) that was discovered by [Johann Palisa](/source/Johann_Palisa) on 17 May 1887 in [Vienna](/source/Vienna) and is thought to have been named after the daughter of astronomer [Edmund Weiss](/source/Edmund_Weiss). It is a dark [C-type asteroid](/source/C-type_asteroid) and is probably composed of primitive [carbonaceous material](/source/carbonaceous_chondrite). 266 Aline is orbiting close to a 5:2 [mean motion resonance](/source/mean_motion_resonance) with [Jupiter](/source/Jupiter), which is located at {{val|2.824|ul=AU}}.<ref name=Hahn_et_al_1991/>

[Photometric](/source/Photometry_(astronomy)) observations made in 2012 at the Organ Mesa Observatory in [Las Cruces, New Mexico](/source/Las_Cruces%2C_New_Mexico), produced a [light curve](/source/light_curve) with a period of 13.018 ± 0.001 hours and a brightness variation of 0.10 ± 0.01 in [magnitude](/source/Magnitude_(astronomy)).<ref name="Pilcher2012"/>

In 2001, the asteroid was detected by radar from the [Arecibo Observatory](/source/Arecibo_Observatory) at a distance of 1.41&nbsp;AU. The resulting data yielded an effective diameter of {{nowrap|109 ± 15 km}}.<ref name="icarus186_1_126"/>

==References==
{{Reflist|refs=
<ref name="Pilcher2012">{{Citation
 | first1    = Frederick
 | last1     = Pilcher
 | title     = Rotation Period Determinations for 46 Hestia, 223 Rosa, 225 Henrietta, 266 Aline, 750 Oskar, and 765 Mattiaca
 | work      = The Minor Planet Bulletin
 | volume    = 39
 | issue     = 3
 | pages     = 171–173
 |date=July 2012
 | bibcode   = 2012MPBu...39..171P
 | 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="icarus186_1_126">{{citation
 | display-authors=1
 | last1=Magri | first1=Christopher
 | last2=Nolan | first2=Michael C.
 | last3=Ostro | first3=Steven J.
 | last4=Giorgini | first4=Jon D.
 | 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
 | url=http://echo.jpl.nasa.gov/asteroids/MBAs/magri.etal.2007.mbas.pdf
 | accessdate=2015-04-14 | postscript=.
}}</ref>

<ref name=Hahn_et_al_1991>{{citation
 | title=Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter
 | last1=Hahn | first1=G. | last2=Lagerkvist | first2=C. -I.
 | last3=Lindgren | first3=M. | last4=Dahlgren | first4=M.
 | display-authors=1 | journal=Astronomy and Astrophysics
 | volume=246 | issue=2 | date=June 1991 | pages=603–618
 | bibcode=1991A&A...246..603H | postscript=. }}</ref>

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

== External links ==
* [http://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database]
* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html Minor Planet Discovery Circumstances]
* [http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT Asteroid Lightcurve Data File]
* {{AstDys|266}}
* {{JPL small body}}

{{Minor planets navigator |265 Anna |number=266 |267 Tirza}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:000266}}
Category:Background asteroids
Aline
Aline
Category:C-type asteroids (Tholen)
Category:Ch-type asteroids (SMASS)
18870517

{{C-beltasteroid-stub}}

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Adapted from the Wikipedia article [266 Aline](https://en.wikipedia.org/wiki/266_Aline) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/266_Aline?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.