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Oct 28, 2011

Matahari

Matahari Sun symbol.svg
The Sun by the Atmospheric Imaging Assembly of NASA's Solar Dynamics Observatory - 20100819.jpg
Data pemerhatian
Jarak purata
dari Bumi
1.496×108 
8 min 19 s at light speed
Kecerahan visual (V)−26.74 [1]
Magnitud mutlak4.83 [1]
Pengelasan spektrumG2V
MetallicityZ = 0.0122[2]
Saiz bersudut31.6′ – 32.7′ [3]
Adjektifsolar
Ciri-ciri orbit
Jarak purata
dari pusat Galaksi Bima Sakti
~2.5×1017 
26,000 
Tempoh masa galaksi(2.25–2.50)×108 a
Halaju~220  (orbit around the center of the Galaxy)
~20  (relative to average velocity of other stars in stellar neighborhood)
~370 [4] (relative to the cosmic microwave background)
Ciri-ciri fizikal
Diameter purata1.392×106  [1]
109 × Earth
Jejarikhatulistiwa6.955×105  [5]
109 × Earth[5]
Lilitan khatulistiwa4.379×106  [5]
109 × Earth[5]
Kepesekan9×10−6
Luas permukaan6.0877×1012  [5]
11,990 × Earth[5]
Isipadu1.412×1018  [5]
1,300,000 × Earth
Jisim1.9891×1030 [1]
333,000 × Earth[1]
Ketumpatan purata1.408×103  [1][5][6]
KetumpatanTengah (model): 1.622×105  [1]
Fotosfera bawah: 2×10−4 
Kromosfera bawah: 5×10−6 
Korona (purata): 1×10−12  [7]
Graviti permukaan khatulistiwa274.0  [1]
27.94 
28 × Earth[5]
Halaju lepas
(dari permukaan)
617.7  [5]
55 × Earth[5]
SuhuCenter (modeled): ~1.57×107 [1]
Photosphere (effective):5,778 K [1]
Corona: ~5×106 
Kekilauan (Lsol)3.846×1026 W [1]
~3.75×1028 
~98  efficacy
Keamatan purata (Isol)2.009×107 
Ciri-ciri putaran
Kecondongan7.25° [1]
(to the ecliptic)
67.23°
(to the galactic plane)
Jarak hamal
kutub Utara[8]
286.13°
19j 4min 30s
Keserongan
kutub Utara
+63.87°
63°52' Utara
Tempoh masa putaran ikut bintang
(di khatulistiwa)
25.05 hari [1]
(di latitud 16°)25.38 hari [1]
25d 9h 7min 12s [8]
(di kutub)34.4 hari [1]
Halaju putaran
(at equator)
7.189×103  [5]
Komposisi photospheric (berdasarkan jisim)
Hidrogen73.46%[9]
Helium24.85%
Oksigen0.77%
Karbon0.29%
Besi0.16%
Neon0.12%
Nitrogen0.09%
Silikon0.07%
Magnesium0.05%
Sulfur0.04%
http://ms.wikipedia.org/wiki/Matahari