eteq/astropysics — Issue #5: FK4->FK5 conversion not coorect
Author: eteq
Created: 2011-11-26 01:13:54+00:00
State: open

Something in the FK4->FK5 conversion isn't working right. e.g.:

```
>>> from astropysics.coords import coordsys
>>>print coordsys.FK4Coordinates('00:26:30 -70:03:00').convert(coordsys.FK5Coordinates)
FK5Coordinates: 17:59:33.341 -3:28:46.13 J2000.0
```

which is very wrong. The problem is somewhere in `coordsys.FK4Coordinates._precessionMatrixB`, but I'll have to dig to see where