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
24Mar2026 08:39:26 PDT	sun	101.9	17.4	149154	1.00	0.0	17.4
24Mar2026 08:39:26 PDT	mercury	126.6	27.1	110403	0.31	24.8	17.4
24Mar2026 08:39:26 PDT	venus	85.6	7.7	238472	0.95	18.6	17.4
24Mar2026 08:39:26 PDT	mars	118.5	23.3	345086	0.99	16.7	17.4
24Mar2026 08:39:26 PDT	saturn	102.4	15.2	1570695	1.00	2.2	17.4
    

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


% sl_smrs 37.8 -122.4
24Mar2026:
Sunrise:  07:07 PDT (87.4°)
Sunset:   19:25 PDT (272.8°)
Moonrise: 10:39 PDT (53.6°)
Moonset:  01:27 PDT (305.8°)
    

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