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
12Mar2026 07:22:43 PDT	moon	168.2	22.3	399	0.39	76.7	-0.8
12Mar2026 07:22:43 PDT	mercury	100.4	6.3	93045	0.05	10.2	-0.8
12Mar2026 07:22:43 PDT	mars	105.9	4.8	347804	0.99	14.1	-0.8
    

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


% sl_smrs 37.8 -122.4
12Mar2026:
Sunrise:  07:25 PDT (93.4°)
Sunset:   19:14 PDT (266.9°)
Moonrise: 03:43 PDT (126.8°)
Moonset:  12:45 PDT (233.6°)
    

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


% sl_data -start 12Mar2026 -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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