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
21Mar2019 15:06:28 PDT	sun	220.5	44.9	149022	1.00	0.0	44.9
21Mar2019 15:06:28 PDT	mercury	231.8	35.3	92579	0.08	12.8	44.9
21Mar2019 15:06:28 PDT	venus	241.2	12.5	181043	0.78	36.9	44.9
21Mar2019 15:06:28 PDT	mars	126.2	63.0	290250	0.93	52.8	44.9
    

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


% sl_smrs 37.8 -122.4
21Mar2019:
Sunrise:  07:12 PDT (89.0°)
Sunset:   19:22 PDT (271.2°)
Moonrise: 20:26 PDT (92.4°)
Moonset:  07:55 PDT (271.2°)
    

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