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
27Mar2026 14:25:35 PDT	sun	209.2	51.5	149289	1.00	0.0	51.5
27Mar2026 14:25:35 PDT	moon	64.8	3.2	376	0.73	117.5	51.5
27Mar2026 14:25:35 PDT	mercury	229.6	29.7	117150	0.38	26.5	51.5
27Mar2026 14:25:35 PDT	venus	178.8	61.9	236864	0.94	19.4	51.5
27Mar2026 14:25:35 PDT	mars	223.3	37.3	344337	0.99	17.4	51.5
27Mar2026 14:25:35 PDT	jupiter	75.6	19.4	748582	0.99	98.3	51.5
27Mar2026 14:25:35 PDT	saturn	209.2	48.4	1570548	1.00	3.1	51.5
    

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


% sl_smrs 37.8 -122.4
27Mar2026:
Sunrise:  07:03 PDT (86.0°)
Sunset:   19:28 PDT (274.4°)
Moonrise: 14:04 PDT (61.7°)
Moonset:  04:14 PDT (300.6°)
    

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