Nutze Skyfield fuer praezisere Daemmerungsberechnung

public/py/vendor/skyfield/naifcodes.py

@@ -0,0 +1,28 @@
+from jplephem.names import (
+    target_name_pairs as code_name_pairs,
+    target_names as code_names
+)
+
+name_codes = dict((name, code) for code, name in code_name_pairs)
+
+def numbered_name_of(code):
+    """Given a code, return a string giving both the code and name.
+
+    >>> numbered_name_of(301)
+    '301 Moon'
+
+    """
+    name = code_names.get(code, '(Unnamed)')
+    return '{0} {1}'.format(code, name)
+
+def _target_name(target):
+    """Return `target` annotated for display to the user.
+
+    * A string target is quoted to make clear that it's a string, like 'comet'.
+    * A numeric target has its NAIF name appended, like 399 EARTH.
+
+    """
+    if isinstance(target, str):
+        return repr(target)
+    name = code_names.get(target, 'UNKNOWN')
+    return '{0} {1}'.format(target, name)