Editing 200 Dynamene (section)

{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
 | minorplanet= yes
 | mpc_name= (200) Dynamene
 | background= #D6D6D6
 | image= Орбита астероида 200.png
 | caption=Orbital diagram
 | name= 200 Dynamene
 | alt_names= A879 OA; 1904 CA;<br/>1955 HZ; {{mp|1961 TO|1}};<br/>{{mp|1974 HE|1}}
 | pronounced={{IPAc-en|d|aɪ|'|n|æ|m|ᵻ|n|iː}}<ref>Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
 | discoverer= [[Christian Heinrich Friedrich Peters|C. H. F. Peters]], 1879
 | mp_category= [[Asteroid belt|Main belt]]
 | orbit_ref= <ref name="JPL"/>
 | semimajor= {{Convert|2.7374|AU|Gm|abbr=on}}
 | perihelion= {{Convert|2.3728|AU|Gm|abbr=on}}
 | aphelion= {{Convert|3.1020|AU|Gm|abbr=on|lk=on}}
 | period= 4.53 [[Julian year (astronomy)|yr]] (1654.3 [[Julian year (astronomy)|d]])
 | inclination= 6.8957°
 | eccentricity= 0.13320
 | dimensions= {{val|128.36|2.1|ul=km}}<ref name="JPL"/><br />130.71 ± 3.01 km<ref name="Carry2012"/>
 | mass= {{nowrap|(1.07 ± 0.16) × 10<sup>19</sup> kg<ref name="Carry2012"/>}}
 | density= 9.14 ± 1.51 g/cm<sup>3</sup><ref name="Carry2012"/>
 | rotation= {{Convert|37.394|h|d|abbr=on|lk=on}}<ref name="JPL"/><ref name="Pilcher39"/>
 | spectral_type= [[C-type asteroid|C]]
 | abs_magnitude= 8.26
 | albedo= {{val|0.0533|0.002}}
 | discovered= 27 July 1879
 | epoch= 31 July 2016 ([[Julian day|JD]] 2457600.5)
 | asc_node= 324.57°
 | arg_peri= 85.089°
 | mean_anomaly= 10.506[[Degree (angle)|°]]
 | mean_motion= {{Deg2DMS|0.21762|sup=ms}} / day
 | observation_arc= 136.47 yr (49845 d)
 | uncertainty= 0
 | moid= {{Convert|1.39358|AU|Gm|abbr=on}}
 | jupiter_moid= {{Convert|2.2934|AU|Gm|abbr=on}}
 | tisserand= 3.328
}}

'''200 Dynamene''' is a large dark [[Asteroid belt|main-belt]] [[asteroid]] that was discovered by German-American astronomer [[Christian Heinrich Friedrich Peters]] on July 27, 1879, in [[Clinton, Oneida County, New York|Clinton, New York]]. The name derives from [[Dynamene]], one of the fifty [[Nereid]]s in Greek mythology. Based upon its spectrum, 200 Dynamene is classified as a [[C-type asteroid]], indicating that it probably has a primitive composition similar to the [[carbonaceous chondrite]] [[meteorite]]s. The spectra of the asteroid displays evidence of aqueous alteration.<ref name=Fornasier1999/>

[[Photometry (astronomy)|Photometric]] observations of this asteroid at the Organ Mesa Observatory in [[Las Cruces, New Mexico]] in 2011 gave a [[light curve]] with a period of 37.394 ± 0.002 hours and a brightness variation of 0.10 ± 0.01 in [[Magnitude (astronomy)|magnitude]]. The curve is asymmetrical with four uneven minima and maxima.<ref name="Pilcher39"/>

[[Occultation#Occultations by asteroids|Occultation]] data from October 9, 2006, using 15 [[Chord (astronomy)|chords]] shows the asteroid is about 130&nbsp;km in diameter.<ref name=asteroidoccultation/>