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
29Mar2026 13:32:00 PDT	sun	187.9	55.6	149371	1.00	0.0	55.6
29Mar2026 13:32:00 PDT	mercury	217.0	36.8	121352	0.42	27.2	55.6
29Mar2026 13:32:00 PDT	venus	151.0	59.9	235851	0.94	19.9	55.6
29Mar2026 13:32:00 PDT	mars	208.7	43.8	343881	0.99	17.8	55.6
29Mar2026 13:32:00 PDT	jupiter	69.3	10.7	753276	0.99	96.4	55.6
29Mar2026 13:32:00 PDT	saturn	191.7	51.7	1570268	1.00	4.5	55.6
    

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


% sl_smrs 37.8 -122.4
29Mar2026:
Sunrise:  07:00 PDT (85.0°)
Sunset:   19:30 PDT (275.4°)
Moonrise: 16:23 PDT (75.8°)
Moonset:  05:20 PDT (287.6°)
    

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