Vanguard 2

Vanguard 2
Sebuah replika satelit Vanguard 2 di depan Goddard Space Flight Center.
Jenis misi
  • Weather satellite
  • Air density experiment
OperatorDepartment of the Navy
Identifikasi Harvard1959 Alpha 1
COSPAR ID1959-001A
SATCAT no.11
Durasi misi
  • Pengamatan cuaca: 19 days
  • Penelitian kerapatan atmosfer masih berlangsung
Properti wahana
ProdusenUnited States Naval Research Laboratory
Massa luncur1.075 kilogram (2.370 pon)
Awal misi
Tanggal luncur17 Februari 1959, 15:55 (17 Februari 1959, 15:55) UTC[1]
Roket peluncurVanguard SLV-4
Tempat peluncuranCape Canaveral, LC-18A
Akhir Misi
Kontak terakhir15 Maret 1959
Tanggal lepas dari orbitDalam 300 tahun
Parameter orbit
Sistem rujukanGeosentris
Sistem orbitOrbit menengah
Sumbu semi-mayor812.772 kilometer (505.033 mi)[2]
Eksentrisitas orbit0.1472316[2]
Ketinggian perigee560 kilometer (350 mi)[2]
Ketinggian apoogee2.953 kilometer (1.835 mi)[2]
Inklinasi32.87°[2]
Periode121.54 minutes[2]
RAAN251.33°[2]
Mean anomaly11.85°[2]
Mean motion11.85[2]
Epoch24 Januari 2015, 14:43:44 UTC[2]
Jumlah revolusi38,278[2]
Instrumen
  • Radio beacon
  • Optical scanner
 

Vanguard 2 atau Vanguard II adalah sebuah satelit pengorbit bumi yang diluncurkan pada 17 Februari 1959 menggunakan sebuah roket Vanguard SLV 4 sebagai bagian dari United States Navy's Project Vanguard.[3] Satelit ini dirancang untuk mengukur distribusi lapisan awan atas pada siang dari orbitnya selama 19 hari dan untuk memberikan informasi tentang kepadatan atmosfer selama masa orbitnya (~ 300 tahun).

Pada April 4, 2012, Vanguard 2 masih terdeteksi di orbit Bumi.[2]

Referensi

  1. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Diakses tanggal 7 December 2013. 
  2. ^ a b c d e f g h i j k l "VANGUARD 2 Satellite details 1959-001A NORAD 11". N2YO. 24 January 2015. Diakses tanggal 25 January 2015.  Kesalahan pengutipan: Tanda <ref> tidak sah; nama "n2yo" didefinisikan berulang dengan isi berbeda
  3. ^ "VANGUARD - A HISTORY, CHAPTER 12, SUCCESS - AND AFTER". NASA. 

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