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{{Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 |
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name=11 Parthenope
| symbol=[[Image:11 Parthenope symbol.svg|15px]]
| discoverer=[[Annibale de Gasparis]]
| discovered=[[May 11]], [[1850]]
| alt_names=''none''
| mp_category=[[Main belt]]
| epoch=[[July 14]], [[2004]] ([[Julian day|JD]] 2453200.5)
| semimajor=366.896 [[Giga|G]][[metre|m]] (2.453 [[Astronomical unit|AU]])
| perihelion=330.297 Gm (2.208 AU)
| aphelion=403.494 Gm (2.697 AU)
| eccentricity=0.100
| period=1402.891 [[day|d]] (3.84 [[Julian year (astronomy)|a]])
| inclination=4.624[[degree (angle)|°]]
| asc_node=125.637°
| arg_peri=195.436°
| mean_anomaly=333.562°
| avg_speed=19.02 km/[[second|s]]
| dimensions=153.3 km
| mass=5.13×10<sup>18</sup> [[kilogram|kg]]<ref name="density.html">[http://www.psi.edu/pds/archive/density.html]{{Dead link|date=March 2008}}</ref>
| density=2.72 g/[[cubic centimetre|cm³]]<ref name="density.html"/>
| surface_grav=0.0578 m/s²
| escape_velocity=0.0941 km/s
| rotation=0.393 d<ref>[http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm]{{Dead link|date=March 2008}}</ref>
| spectral_type=[[S-type asteroid]]
| magnitude = 8.62 <!-- Horizons 2031-07-29 --> to 12.10
| abs_magnitude=6.55
| albedo=0.180&nbsp;([[geometric albedo|geometric]])&nbsp;<ref>[http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab]{{Dead link|date=March 2008}}</ref>
| angular_size = 0.178" <!-- Horizons 2008-Aug-07 --> to 0.057"
| single_temperature=~174 [[kelvin|K]]}}
'''11 Parthenope''' ({{pronEng|pɑrˈθɛnəpi}} {{respell|par|THEN|ə-pee}}, {{lang-gr|''Παρθενόπη}})'' is a large, bright [[Main belt]] [[asteroid]].

Parthenope was discovered by [[Annibale de Gasparis]] on [[May 11]], [[1850]], the second of his nine asteroid discoveries. It was named after one of the [[Siren]]s in [[Greek mythology]], said to have founded the city of [[Naples]]. De Gasparis "used his utmost endeavours to realise a 'Parthenope' in the heavens, such being the name suggested by Sir [[John Herschel]] on the occasion of the discovery of ''[[10 Hygiea|Hygeia]]'' in [[1849]]".<ref>{{cite journal| url=http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1850MNRAS..10..145.&amp;db_key=AST&amp;high=40daf3f6f909335| last=De Gasparis| first= Annibale| title=The New Planet Parthenope| journal= Monthly notices of the Royal Astronomical Society| volume=10| pages=144&ndash;147| month=May| year= 1850}}</ref>

There have been two observed Parthenopian [[occultation]]s, on [[February 13]], [[1987]], and April 28, 2006.

On [[August 6]] [[2008]], during a [[Apsis|perihelic]] [[Opposition (astronomy and astrology)|opposition]], Parthenope will shine at an [[apparent magnitude]] of 8.8.<ref name=bright2008>{{cite web
|title=Bright Minor Planets 2008
|publisher=[[Minor Planet Center]]
|url=http://www.cfa.harvard.edu/iau/Ephemerides/Bright/2008
|accessdate=2008-05-20}}</ref>

==References==
<references/>

==External links==
*[http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=11;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=11 Ephemeris]
*[http://lunar-occultations.com/iota/iotandx.htm IOTA] (International Occultation Timing Association) occultation database

{{MinorPlanets Navigator|10 Hygiea|12 Victoria}}
{{MinorPlanets_Footer}}

{{DEFAULTSORT:Parthenope}}
[[Category:Main Belt asteroids]]
[[Category:Asteroids named from Greek mythology]]
[[Category:S-type asteroids]]

[[als:(11) Parthenope]]
[[ast:11 Parthenope]]
[[bg:11 Партенопа]]
[[ca:(11) Parthenope]]
[[cs:Parthenope (planetka)]]
[[de:Parthenope (Asteroid)]]
[[el:11 Παρθενόπη]]
[[es:(11) Parténope]]
[[fr:(11) Parthénope]]
[[it:11 Parthenope]]
[[ja:パルテノペ (小惑星)]]
[[no:11 Parthenope]]
[[nn:11 Parthenope]]
[[pl:11 Parthenope]]
[[pt:11 Parténope]]
[[ru:11 Парфенопа]]
[[simple:11 Parthenope]]
[[sk:11 Parthenope]]
[[sv:11 Parthenope]]
[[zh:海妖星]]

Revision as of 08:45, 11 October 2008

11 Parthenope
Discovery
Discovered byAnnibale de Gasparis
Discovery dateMay 11, 1850
Designations
none
Main belt
Symbol
Orbital characteristics
Epoch July 14, 2004 (JD 2453200.5)
Aphelion403.494 Gm (2.697 AU)
Perihelion330.297 Gm (2.208 AU)
366.896 Gm (2.453 AU)
Eccentricity0.100
1402.891 d (3.84 a)
19.02 km/s
333.562°
Inclination4.624°
125.637°
195.436°
Physical characteristics
Dimensions153.3 km
Mass5.13×1018 kg[1]
Mean density
2.72 g/cm³[1]
0.0578 m/s²
0.0941 km/s
0.393 d[2]
Albedo0.180 (geometric) [3]
Temperature~174 K
Spectral type
S-type asteroid
8.62 to 12.10
6.55
0.178" to 0.057"

11 Parthenope (Template:PronEng par-THEN-ə-pee, [Παρθενόπη] Error: {{Lang-xx}}: text has italic markup (help)) is a large, bright Main belt asteroid.

Parthenope was discovered by Annibale de Gasparis on May 11, 1850, the second of his nine asteroid discoveries. It was named after one of the Sirens in Greek mythology, said to have founded the city of Naples. De Gasparis "used his utmost endeavours to realise a 'Parthenope' in the heavens, such being the name suggested by Sir John Herschel on the occasion of the discovery of Hygeia in 1849".[4]

There have been two observed Parthenopian occultations, on February 13, 1987, and April 28, 2006.

On August 6 2008, during a perihelic opposition, Parthenope will shine at an apparent magnitude of 8.8.[5]

References

  1. ^ a b [1][dead link]
  2. ^ [2][dead link]
  3. ^ [3][dead link]
  4. ^ De Gasparis, Annibale (1850). "The New Planet Parthenope". Monthly notices of the Royal Astronomical Society. 10: 144–147. {{cite journal}}: Unknown parameter |month= ignored (help)
  5. ^ "Bright Minor Planets 2008". Minor Planet Center. Retrieved 2008-05-20.

External links

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