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 -refraction 37.8 -122.4 | sl_find 'elev>0'
# datetime		object	bearing	elev	dist	full	sunsep	sunelev
17Mar2026 19:31:55 PDT	venus	266.2	12.8	241483	0.96	16.7	-3.1
17Mar2026 19:31:55 PDT	jupiter	134.4	70.2	725581	0.99	107.4	-3.1
17Mar2026 19:31:55 PDT	saturn	267.8	2.5	1569785	1.00	6.7	-3.1
    

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


% sl_smrs 37.8 -122.4
17Mar2026:
Sunrise:  07:18 PDT (91.0°)
Sunset:   19:18 PDT (269.3°)
Moonrise: 06:36 PDT (101.2°)
Moonset:  18:11 PDT (262.8°)
    

And here are the close celestial encounters for the next week:


% sl_data -start 17Mar2026 -duration 7d -interval 5m -planets -refraction 37.8 -122.4 | sl_conjunctions
mercury (crescent) and moon (crescent)
  start at 17Mar2026 06:40 PDT  b: 100.8° e: 1.6°  2.62° apart
  minsep at 17Mar2026 06:40 PDT  b: 100.8° e: 1.6°  2.62° apart
  end at 17Mar2026 06:55 PDT  b: 103.1° e: 4.2°  2.62° apart
    

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