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Fall Equinox Sunset Watch 2012

Posted By Alice On September 16, 2012 @ 3:53 pm In AstroInfo Article | 1 Comment

It’s time for the 14th seasonal sunset watch!!

  • When: Saturday, September 22 at 7:00pm (so come at 6:45pm)
    • Actual sunset is supposed to be at 7:09pm, but at the summer solstice we noticed that the Sun set about 10 minutes earlier than the USNO [1] says it does, so I’ve moved the time of our sunset watch up so we don’t miss it. Last autumn the timing seemed to line up correctly – what will it do this time?
    • The equinox moment is at 7:49am… but we’re watching the sunset not the sunrise.
  • Where: Solstice Park [2] – 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.
[3]

Sunset on September 23, 2011 Image credit: Jason Gift Enevoldsen

Come watch the autumn equinox sunset at Solstice Park in West Seattle on Saturday the 22nd. We’ll see if the sunset lines up with the placed marker. 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 sleet I’m staying home with some hot 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: [1]

Sun and Moon Data for One Day

The following information is provided for Seattle, King County, Washington (longitude W122.3, latitude N47.6):

Saturday 22 September 2012 Pacific Daylight Time

SUN
Begin civil twilight 6:26 a.m.
Sunrise 6:57 a.m.
Sun transit 1:02 p.m.
Sunset 7:06 p.m.
End civil twilight 7:37 p.m.

MOON
Moonset 10:48 p.m. on preceding day
Moonrise 2:45 p.m.
Moon transit 7:17 p.m.
Moonset 11:52 p.m.
Moonrise 3:31 p.m. on following day

First quarter Moon on 22 September 2012 at 12:41 p.m. Pacific Daylight Time.

This event is my part of the NASA’s Solar System Ambassador program, and thanks to West Seattle Blog [4] for publicizing the last few!

Everyone is welcome, see you there!

~ A l i c e !


Article printed from Alice's Astro Info: http://www.alicesastroinfo.com

URL to article: http://www.alicesastroinfo.com/2012/09/fall-equinox-sunset-watch-2012/

URLs in this post:

[1] USNO: http://www.usno.navy.mil/USNO/astronomical-applications/data-services/rs-one-day-us

[2] Solstice Park: http://www.alicesastroinfo.com../2009/06/solstice-park-west-seattle/

[3] Image: http://www.alicesastroinfo.com/wp-content/uploads/2011/12/Enevoldsen-2011_09_19-Solstice-Park.jpg

[4] West Seattle Blog: http://westseattleblog.com/

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