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{{Infobox spaceflight|auto=all
| name = Vanguard 2
'''Vanguard 2''' atau '''Vanguard II''' merupakan sebuah satelit yang mengorbit bumi diluncurkan 17 Februari 1959 dengan sebuah roket Vanguard SLV 4 sebagai bagian dari United States Navy's Project Vanguard.<ref>{{cite web | url = http://history.nasa.gov/SP-4202/chap12.html | title = VANGUARD - A HISTORY, CHAPTER 12, SUCCESS - AND AFTER | publisher = NASA}}</ref> Satelit ini dirancang untuk mengukur distribusi awan-cover atas bagian siang dari orbitnya, untuk jangka waktu 19 hari, dan untuk memberikan informasi tentang kepadatan atmosfer selama masa orbitnya (~ 300 tahun).▼
| image = Vanguard2.jpg
| image_caption = Sebuah replika satelit Vanguard 2 di depan [[Pusat Penerbangan Luar Angkasa Goddard|Goddard Space Flight Center]].
| insignia =
| mission_type = {{unbulleted list|Weather satellite|Air density experiment}}
Pada April 4, 2012, Vanguard 2 masih dalam orbit.<ref name="n2yo">{{cite web|url=http://www.n2yo.com/satellite/?s=11|title=VANGUARD 2 Satellite details 1959-001A NORAD 11|work=N2YO|date=4 December 2013|accessdate=7 December 2013}}</ref>▼
| operator = [[Angkatan Laut Amerika Serikat|Department of the Navy]]
| Harvard_designation = 1959 Alpha 1
| SATCAT = 11
| mission_duration = {{unbulleted list|Pengamatan cuaca: 19 days|<small>Penelitian kerapatan atmosfer masih berlangsung</small>}}
| spacecraft_type =
| spacecraft_bus =
| manufacturer = [[United States Naval Research Laboratory]]
| dry_mass =
| launch_mass = {{convert|10.75|kg}}
| dimensions =
| power =
| launch_date = {{start-date|17 Februari 1959, 15:55|timezone=yes}} UTC<ref name="launchlog">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|accessdate=7 December 2013}}</ref>
| launch_rocket = [[Vanguard (roket)|Vanguard]] '''SLV-4'''
| launch_site = [[Cape Canaveral Air Force Station|Cape Canaveral]], [[Cape Canaveral Air Force Station Launch Complex 18|LC-18A]]
| launch_contractor =
| last_contact = 15 Maret 1959
| decay_date = Dalam 300 tahun
| orbit_epoch = 24 Januari 2015, 14:43:44 UTC<ref name="n2yo">{{cite web|url=http://www.n2yo.com/satellite/?s=11|title=VANGUARD 2 Satellite details 1959-001A NORAD 11|publisher=N2YO|date=24 January 2015|accessdate=25 January 2015}}</ref>
| orbit_reference = [[Orbit geosentris|Geosentris]]
| orbit_regime = [[Orbit bumi menengah|Orbit menengah]]
| orbit_periapsis = {{convert|560|km|mi|sp=us}}<ref name="n2yo"/>
| orbit_apoapsis = {{convert|2953|km|mi|sp=us}}<ref name="n2yo"/>
| orbit_inclination = 32.87°<ref name="n2yo"/>
| orbit_semimajor = {{convert|8127.72|km|mi|sp=us}}<ref name="n2yo"/>
| orbit_eccentricity = 0.1472316<ref name="n2yo"/>
| orbit_period = 121.54 minutes<ref name="n2yo"/>
| orbit_RAAN = 251.33°<ref name="n2yo"/>
| orbit_mean_anomaly = 11.85°<ref name="n2yo"/>
| orbit_mean_motion = 11.85<ref name="n2yo"/>
| orbit_rev_number = 38,278<ref name="n2yo"/>
| apsis = gee
| instruments = {{unbulleted list|Radio beacon|Optical scanner}}
}}
▲'''Vanguard 2''' atau '''Vanguard II'''
▲Pada April 4, 2012, Vanguard 2 masih
== Referensi ==
Baris 11 ⟶ 55:
== Pranala luar ==
* [http://www.youtube.com/watch?v=mgyhlQiKhhE Historic newsreel footage of the Vanguard II Satellite]
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[[Kategori:Satelit cuaca]]
[[Kategori:Proyek Vanguard]]
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