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{{Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 |
name=13 Egeria
|symbol = [[Berkas:Egeria symbol (bold).svg|24px]]
| discoverer=[[Annibale de Gasparis]]
| discovered=[[2 November]] [[1850]]
| alt_names=
| mp_category=[[Sabuk utama]]
| orbit_ref=<ref name=jpldata>{{cite web
|date=2008-11-04
|title=JPL Small-Body Database Browser: 13 Egeria
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=13
|accessdate=2008-11-25}}</ref>
| epoch=14 Juli 2004 ([[Hari Julian]] 2453200,5)
| semimajor=385,336 Gm (2,576 SA)
| perihelion=352,719 Gm (2,358 SA)
| aphelion=417,953 [[Giga-|Gm]] (2,794 [[Astronomical unit|SA]])
| eccentricity=0,085
| period=1509,977 [[hari|hr]] (4,13 [[Tahun Julian|a]])
| inclination=16,540[[derajat (satuan sudut)|°]]
| asc_node=43,305°
| arg_peri=81,401°
| mean_anomaly=339,787°
| avg_speed=18,56 km/[[detik|dtk]]
| dimensions=207,6 ± 8,3 km ([[IRAS]])<ref name=jpldata/><br>(217×196 km)
| mass=1,63{{e|19}} kg<ref name=Baer>{{cite web
|year=2008
|title=Recent Asteroid Mass Determinations
|publisher=Personal Website
|author=Jim Baer
|url=http://home.earthlink.net/~jimbaer1/astmass.txt
|accessdate=2008-11-28
|archive-date=2013-10-21
|archive-url=https://web.archive.org/web/20131021074442/http://home.earthlink.net/~jimbaer1/astmass.txt
|url-status=dead
}}</ref>
| density=3,46±0,79 g/cm³<ref name=Baer/>
| surface_grav=~0,0580 m/s²
| escape_velocity=~0,1098 km/s
| rotation=0,2935 hr<ref>{{cite web |url=http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm |title=Lightcurves and map data on numbered asteroids N° 1 to 52225 |accessdate=2008-11-03 |publisher=AstroSurf |archiveurl=https://web.archive.org/web/20051127063200/http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm |archivedate=2005-11-27 |url-status=dead }}</ref><br>(7,045 jam)<ref name=jpldata/>
| spectral_type=[[Asteroid tipe G]]<ref name=jpldata/>
| magnitude = 9,71 hingga 12,46<ref>[[apparent magnitude|apmag]] 9.71 (2061-Nov-06) to 12.46 (1990-Mar-12) [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=13 JPL Horizons] daily output for 1950 to 2099</ref>
| abs_magnitude=6,74<ref name=jpldata/>
| albedo=0,083<ref name=jpldata/><ref>{{cite web |url=http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab |title=Asteroid Data Archive |accessdate=2008-11-03 |publisher=Planetary Science Institute |archiveurl=https://web.archive.org/web/20060623213811/http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab |archivedate=2006-06-23 |dead-url=no }}</ref>
|named_after=[[Egeria]]
| single_temperature=~174 [[kelvin|K]]
}}
'''13 Egeria''' ({{IPAc-en|@|ˈ|dʒ|ɪər|i|ə}} {{respell|i|JEER|ee-ə}}; {{lang-la|Ægeria}}) {{fix|text=panjang pengucapan huruf vokal tidak disertakan}} adalah sebuah [[asteroid]] tipe G di [[sabuk utama]] yang besar<ref>{{cite web|url=http://www.lpi.usra.edu/meetings/LPSC98/pdf/1310.pdf|title=High-resolution 2.5–3.5 {{mu}}M Observations of C-, B- and G-class asteroids.|last=Rivkin|first=A. S.|author2=J. K. Davies|author3=S. L. Ellison|author4=L. A. Lebofsky|accessdate=2008-04-20}}</ref> yang ditemukan oleh [[Annibale de Gasparis]] pada 2 November 2 1850, dan dinamai oleh [[Urbain Le Verrier]], yang berkat perhitungannya manusia dapat menemukan [[Neptunus]].
[[Egeria]] merupakan [[dewi]] (beberapa sumber mengatakan [[nimfa]]) [[Ariccia]] di [[Italia]], dan merupakan istri dari [[Numa Pompilius]], raja [[Roma]] yang kedua.<ref>{{cite book|last=Schmadel|first=Lutz D.|title=Dictionary of minor planet names, Volume 1|url=https://archive.org/details/dictionaryminorp00schm|edition=5th|year=2003|publisher=Springer-Verlag|location=Berlin Heidelberg New York|isbn=3-540-00238-3|pages=[https://archive.org/details/dictionaryminorp00schm/page/16 16]}}</ref>
Egeria pernah menutupi sebuah [[bintang]] pada 8 Januari 1992. Cincin yang sebelumnya dianggap cukup melingkar (217×196 km).
[[Berkas:20080122 13EgeriaOccultationProfile.png|jmpl|kiri|200px|Visualisasi OCCULT4 terhadap 13 Egeria saat menutupi benda langit lain pada 22 Januari 2008]] Pada 22 Januari 2008, Egeria menutupi bintang yang lainnya. Penutupan ini sudah diperhitungkan oleh beberapa pengamat di [[New Mexico]] dan [[Arizona]], dikoordinasikan oleh [http://lunar-occultations.com/iota/iotandx.htm IOTA Asteroid Occultation Program].<ref>{{cite web|url=http://www.asteroidoccultation.com/observations/Results/index2008.html|title=IOTA Asteroid Occultation Results for 2008|last=Timerson|first=Brad|accessdate=2010-01-19}} [http://www.asteroidoccultation.com/observations/Results/Data2008/20080122_EgeriaProfile.png (Chords)] {{Webarchive|url=https://web.archive.org/web/20140416210320/http://www.asteroidoccultation.com/observations/Results/Data2008/20080122_EgeriaProfile.png |date=2014-04-16 }}</ref> Kemudian data dimasukkan ke OCCULT4, program estimasi dan visualisasi yang ditulis oleh Dave Herald dari [[Canberra]], [[Australia]].
Egeria telah dipelajari dengan radar astronomi.<ref name="detected">{{cite web
|title=Radar-Detected Asteroids and Comets
|publisher=NASA/JPL Asteroid Radar Research
|url=http://echo.jpl.nasa.gov/asteroids/
|accessdate=2011-10-30}}</ref>
== Konten yang kaya air ==
== Referensi ==
Baris 10 ⟶ 69:
== Pranala luar ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=13;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=13 JPL Horizons Ephemeris]
* {{cite web |title=Elements and Ephemeris for (13) Egeria |publisher=Minor Planet Center |url=http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=b2011&o=00013 |access-date=2012-03-09 |archive-date=2016-03-04 |archive-url=https://web.archive.org/web/20160304084942/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=b2011&o=00013 |url-status=dead }} (displays [[Elongation (astronomy)|Elong]] from Sun and [[apparent magnitude|V mag]] for 2011)
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