Remember several basic constants: North Silver Equatorial coordinates: (alphagp, deltagp) = (192.85948, 27.12825) unit is the degree, the same. The silver heart direction l = 0, b = 0. The corresponding equatorial coordinates (Alpha, Delta) = (266.405, -28.936). The Northern Nine-Terminal LCP = 122.932. If the equatorial coordinates of the celestial body are (Alpha, Delta), their silver coordinates (L, B) can be obtained from the formula: sin (b) = sin (delta) COS (Delta) COS (Delta) COS (Alpha-alphagp) COS (B) SIN (LCP-L) = COS (DELTA) SIN (Alpha-alphagp) COS (B) COS (LCP-L) = COS (DeltaGP) SIN (DELTA) - SIN (DeltaGP ) COS (DELTA) COS (alpha-alphagp) reverse conversion formula is as follows: sin (delta) = sin (deltaGP) SIN (B) COS (DELTAGP) COS (B) COS (LCP-L) COS (Delta) sin (alpha-alphagp) = COS (B) SIN (LCP-L) COS (DELTA) COS (APLHA-alphagp) = COS (DELTAGP) SIN (DELTAGP) COS (B) COS (LCP-L)
