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
19Sep2014 12:52:50 PDT	sun	175.6	53.4	150269	1.00	0.0	53.4
19Sep2014 12:52:50 PDT	moon	251.0	42.6	401	0.17	49.2	53.4
19Sep2014 12:52:50 PDT	mercury	148.3	35.3	150844	0.62	26.3	53.4
19Sep2014 12:52:50 PDT	venus	190.2	58.1	252943	0.99	9.4	53.4
19Sep2014 12:52:50 PDT	mars	121.4	2.8	220871	0.88	67.2	53.4
19Sep2014 12:52:50 PDT	jupiter	248.7	50.9	894245	1.00	42.9	53.4
19Sep2014 12:52:50 PDT	saturn	126.3	16.9	1572393	1.00	52.7	53.4
    

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


% sl_smrs 37.8 -122.4
19Sep2014:
Sunrise:  06:55 PDT (87.6°)
Sunset:   19:11 PDT (272.1°)
Moonrise: 02:49 PDT (71.7°)
Moonset:  16:40 PDT (286.4°)
    

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