sightliner - find sight lines for the sun and moon

Not quite released yet.

Here are the current positions of the celestial objects, above the horizon as seen from San Francisco:


% sl_data -planets -num 1 37.8 -122.4 | sl_find 'elev>0'
# datetime		object	bearing	elev	dist	full	sunsep	sunelev
23Sep2017 20:06:37 PDT	moon	242.0	13.4	397	0.15	45.8	-13.1
23Sep2017 20:06:37 PDT	jupiter	258.0	0.3	947781	1.00	25.3	-13.1
23Sep2017 20:06:37 PDT	saturn	206.9	25.2	1523115	1.00	80.5	-13.1
    

Here are today's sun/moon rise/set times and bearings for San Francisco:


% sl_smrs 37.8 -122.4
23Sep2017:
Sunrise:  06:59 PDT (89.8°)
Sunset:   19:04 PDT (270.0°)
Moonrise: 10:19 PDT (103.7°)
Moonset:  21:25 PDT (254.2°)
    

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