- 11 Parthenope
Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=11 Parthenope
symbol=
discoverer=Annibale de Gasparis
discovered=May 11 ,1850
alt_names="none"
mp_category=Main belt
epoch=July 14 ,2004 (JD 2453200.5)
semimajor=366.896 Gm (2.453 AU)
perihelion=330.297 Gm (2.208 AU)
aphelion=403.494 Gm (2.697 AU)
eccentricity=0.100
period=1402.891 d (3.84 a)
inclination=4.624°
asc_node=125.637°
arg_peri=195.436°
mean_anomaly=333.562°
avg_speed=19.02 km/s
dimensions=153.3 km
mass=5.13×1018 kg [http://www.psi.edu/pds/archive/density.html] Dead link|date=March 2008]
density=2.72 g/cm³
surface_grav=0.0578 m/s²
escape_velocity=0.0941 km/s
rotation=0.393 d [ [http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm] Dead link|date=March 2008]
spectral_type=S-type asteroid
magnitude = 8.62 to 12.10
abs_magnitude=6.55
albedo=0.180 (geometric) [ [http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab] Dead link|date=March 2008]
angular_size = 0.178" to 0.057"
single_temperature=~174 K11 Parthenope (pronEng|pɑrˈθɛnəpi respell|par|THEN|ə-pee, _gr. "Παρθενόπη)" is a large, bright
Main belt asteroid .Parthenope was discovered by
Annibale de Gasparis onMay 11 ,1850 , the second of his nine asteroid discoveries. It was named after one of theSiren s inGreek mythology , said to have founded the city ofNaples . De Gasparis "used his utmost endeavours to realise a 'Parthenope' in the heavens, such being the name suggested by SirJohn Herschel on the occasion of the discovery of "Hygeia" in1849 ". [cite journal| url=http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1850MNRAS..10..145.&db_key=AST&high=40daf3f6f909335| last=De Gasparis| first= Annibale| title=The New Planet Parthenope| journal= Monthly notices of the Royal Astronomical Society| volume=10| pages=144–147| month=May| year= 1850]There have been two observed Parthenopian
occultation s, onFebruary 13 ,1987 , and April 28, 2006.On
August 6 2008 , during a perihelic opposition, Parthenope will shine at anapparent magnitude of 8.8.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]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
Wikimedia Foundation. 2010.