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December 21 Winter Solstice Sunset Watch–2017

PostHeaderIcon December 21 Winter Solstice Sunset Watch–2017

It’s time for the 35th seasonal sunset watch!

I can’t wait to see you for a chilly winter sunset. We’ll also watch for the fingernail-crescent of the Moon just after sunset.

  • When: Thursday, December 21 at 4:05pm (so come at 3:45pm)
    • Actual sunset is supposed to be at 4:20pm, but we have noticed that the Sun sets about 10 minutes earlier than the USNO says, because of the horizon altitude.
    • The equinox moment is Thursday, December 21 at 8:28am 
  • Where: Solstice Park – all the way up the hill from the tennis courts (or, if you’re not in Seattle, wherever you have a view of the western horizon!)
  • Who: Everyone welcome, as usual. (Please do leash your dogs as we usually have a good number of people, kids, and other dogs around.)
Parent and Child at Sunset by Kazuhiko Teramoto

Parent and Child at Sunset by Kazuhiko Teramoto, skyseeker

Come watch the sunset at Solstice Park in West Seattle. I’ll be there even if it is cloudy because sometimes the Sun peeks through just as it begins to set, but if it is driving rain or a thunderstorm I’m staying home with some tea!

If you’re interested – here’s the timing of various celestial events  from Seattle, courtesy of the U.S. Naval Observatory Astronomical Applications Department:

Sun and Moon Data for One Day

U.S. Naval Observatory
Astronomical Applications Department

Seattle, King County, WA (Longitude W122° 20′, Latitude N47° 38′)

Thursday, December 21, 2017 Pacific Standard Time
Sun
Begin civil twilight 7:19 a.m.
Sunrise 7:55 a.m.
Sun transit 12:08 p.m.
Sunset 4:20 p.m.
End civil twilight 4:56 p.m.
Moon
Moonrise 10:09 a.m.
Moon transit 2:56 p.m.
Moonset 7:48 p.m.
Closest Primary Moon Phase: New Moon on December 17, 2017 at 10:30 p.m. (local standard time)

Phase of the Moon on December 21, 2017: Waxing Crescent with 11% of the Moon’s visible disk illuminated.

This event is my part of the NASA’s Solar System Ambassador program, and thanks to West Seattle Blog for publicizing all of them!

Everyone is welcome, see you there!

~ A l i c e !

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