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SLA_EG50 - B1950 $\alpha,\delta$ to Galactic

ACTION:
Transformation from B1950.0 FK4 equatorial coordinates to IAU 1958 galactic coordinates.

CALL:
CALL sla_EG50 (DR, DD, DL, DB)

GIVEN:

DR,DD D B1950.0 $[\,\alpha,\delta\,]$ (radians)

RETURNED:

DL,DB D galactic longitude and latitude $[\,l^{I\!I},b^{I\!I}\,]$ (radians)

NOTE:
The equatorial coordinates are B1950.0 FK4. Use the routine sla_EQGAL if conversion from J2000.0 FK5 coordinates is required.

REFERENCE:
Blaauw et al., 1960, Mon.Not.R.astr.Soc., 121, 123.


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Next: SLA_EL2UE - Conventional to Universal Elements
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SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk