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62 Pedoman Hisab Muhammadiyah<br />

e.t. - swλ = 11 j 51 m 06 d - 21 m 24 d<br />

= 11 j 29 m 42 d WIB<br />

Ihtiyat = 01 m 18 d +<br />

Zuhur = 11 j 31 m WIB<br />

Kesimpulan: Awal waktu salat Zuhur di Yogyakarta tanggal 6<br />

Desember 2008 pukul 11:31 WIB.<br />

2. Awal waktu salat Asar untuk kota Yogyakarta dan sekitarnya<br />

menurut WIB pada tanggal 6 Desember 2008.<br />

1) Data:<br />

a. Lintang tempat (φ) = -07° 48′<br />

b. Bujur tempat (λ) = 110° 21′ BT.<br />

c. Equation of Time (e) = +08 m 51 d<br />

d. Deklinasi matahari (δ) = -22° 32′ 53″<br />

2) Rumus awal waktu Asar<br />

Asar = [(e.t.+t) -/+ swλ] + i<br />

e.t. = 12 j – e<br />

t = cos -1 (-tan φ tan δ + )<br />

sin h<br />

cos φ cos δ<br />

h = cotan -1 (tan z m + 1)<br />

z m = /φ - δ/<br />

swλ = /λtp - λdh/ : 15

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