For SJAA club events, see the SJAA calendar page.
Parents: please see some
tips for enjoying the night sky.
Parents: please see some tips for enjoying the night sky.
==================================================== Watch this space for details of coming events ====================================================
Assigned dates. Grouped by week. See the next section for available dates.2016: July 7, Thur - Stanford University, Tech Trek (not SJAA event, some SJAA members assist) July 12, Thur - Stanford University, Tech Trek (not SJAA event, some SJAA members assist) Oct. 7, Fri -- St. Timothy Elementary, San Jose Nov. 8, Tue -- Almaden Branch Library, SE San Jose
Available dates. See the previous section for assigned dates.
Desirability is determined by the phase of the Moon. The moon is spectacular and well-liked, very desirable for a star party. Such dates are:2016: May - no dates with the evening moon.
Dates with no moon in the evening sky are more plentiful. There are many star clusters, colorful double stars, etc., so the sky is very rewarding. Consider:The school star party program is on vacation during June and July.2016: May 25-28, 30-31 9:30. PDT started on March 13
Too much moon (over 75% illuminated) makes it difficult to show anything but a few bright objects, so we try to stay away from the nearly-full moon. It's a poor show, and not fair to the students (nor to the astronomers).
Approximate start times by grade, through the school yearRunning times; setup and takedown allowances:early August 9:15 ** high school only mid August 9:00 ** " early September 8:45 * high and middle mid September 8:15 all grades early October 7:45 mid October 7:30 early November 6:15 After DST ended on Nov.1, 2015 mid November 6:00 all December 6:00 early January 6:00 Start 2016 mid January 6:15 early February 6:30 mid February 6:45 early March 7:00 mid March 7:15 DST began on March 13, 2016 mid March 8:15 After DST started late March 8:30 early April 8:30 * high and middle mid April 8:45 * " early May 9:00 ** high only mid May 9:15 ** " late May 9:30 ** "* Not recommended for elementary schools.
** Not recommended for elementary nor for middle schools.
Optional details about start times:
Ideally, a star party should run two hours, allowing time for everyone to look through each telescope, then move some of the scopes to additional targets. But ninety minutes is a practical minimum.
In addition, allow 90 minutes before the start time for the astronomers to set up, and 30 minutes afterward to pack the telescopes.
These details are not important when scheduling a star party in the greater San Jose area.
- Start times are approximately one hour after sunset. More specifically, they are at "Nautical Twilight": the time when the sun is 12 degrees below the horizon. It is rounded to the nearest 15-minute interval.
- The time from sunset to nautical twilight varies from about 58 to 70 minutes; it is minimum about November 20 and January 20, and maximum about June 21, varying slightly by year. They depend on the site's latitude, 37.3 degrees north.
- The start times depend on both latitude and longitude; the latter is 121.9 degrees west.
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Latest update: 2016 May 20, 1240
Remove past events, tinker with formats