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
21Jan2019 12:22:12 PST	sun	180.4	32.4	147214	1.00	0.0	32.4
21Jan2019 12:22:12 PST	mercury	185.9	29.2	212817	0.99	5.7	32.4
21Jan2019 12:22:12 PST	venus	228.3	16.1	118611	0.58	46.2	32.4
21Jan2019 12:22:12 PST	mars	98.8	20.2	215306	0.89	72.5	32.4
21Jan2019 12:22:12 PST	jupiter	226.4	14.3	895793	1.00	45.5	32.4
21Jan2019 12:22:12 PST	saturn	199.9	27.3	1644602	1.00	17.7	32.4
    

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


% sl_smrs 37.8 -122.4
21Jan2019:
Sunrise:  07:22 PST (114.9°)
Sunset:   17:20 PST (245.2°)
Moonrise: 18:16 PST (67.0°)
Moonset:  07:49 PST (294.5°)
    

And here are the close celestial encounters for the next few days:


% sl_data -duration 3d -interval 10m -planets 37.8 -122.4 | sl_conjunctions
jupiter (full) and venus (half)
  start at 22Jan2019 04:22 PST  b: 118.3° e: 1.7°  2.36° apart
  minsep at 22Jan2019 06:22 PST  b: 139.9° e: 20.1°  2.34° apart
  end at 22Jan2019 06:52 PST  b: 146.4° e: 23.7°  2.43° apart
jupiter (full) and venus (half)
  start at 23Jan2019 04:22 PST  b: 118.6° e: 1.9°  2.50° apart
  minsep at 23Jan2019 04:22 PST  b: 118.6° e: 1.9°  2.50° apart
  end at 23Jan2019 06:52 PST  b: 146.8° e: 23.7°  2.53° apart
    

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