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
28Mar2026 18:56:19 PDT	sun	269.9	5.8	149338	1.00	0.0	5.8
28Mar2026 18:56:19 PDT	moon	102.0	40.6	376	0.83	132.4	5.8
28Mar2026 18:56:19 PDT	venus	264.0	24.5	236254	0.94	19.5	5.8
28Mar2026 18:56:19 PDT	jupiter	137.7	71.0	751421	0.99	97.0	5.8
28Mar2026 18:56:19 PDT	saturn	268.6	2.3	1570396	1.00	3.7	5.8
    

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


% sl_smrs 37.8 -122.4
28Mar2026:
Sunrise:  07:01 PDT (85.4°)
Sunset:   19:29 PDT (274.9°)
Moonrise: 15:15 PDT (68.3°)
Moonset:  04:50 PDT (294.6°)
    

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