Naperville Astronomical Association
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Our Current Club Events Calendar

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

August 23

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Lisle Annual Community Park Campout @ 6:00pm

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"Solar Saturday", Public Sun Viewing at Naperville Riverwalk @ 9:00am - 12:00pm

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September 1
NAA Regular Meeting @ 7:30pm

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Members' Night / Library Night at AEC @ 6:30pm
[Entry from Naperville Water Reclaimation Center Main Gate]

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Public Night at AEC @ 7:00pm
[Entry from Naperville Water Reclaimation Center Main Gate]

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NAA Board Meeting

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Member's Dark Site Night at RR/CF

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Member's Dark Site Night at RR/CF

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Astronomy Fundamentals Meeting @ 7:30pm

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Naperville Riverwalk Outreach [near the Dandelion Fountain on Jackson Ave] @ Dusk

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Star Party for Carillon Club @ 7:00pm

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Camp Greenwood Star Party @ 7:00pm

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"Solar Saturday", Public Sun Viewing at Naperville Riverwalk @ 9:00am - 12:00pm

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Lunar Eclipse Observing [near the Dandelion Fountain on Jackson Ave] @ 7:30pm

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October 1

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      Help! indicates an event which member volunteers are needed for; please sign up at a meeting, or click the Help to volunteer via e-mail. Green entries indicate events which are open to the public (come join us!) Purple entries are events for other groups; they may or may not also be open to the general public. Black entries are events for club members only. Click here to find out how to join the club.


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Check our Home Page for Go/Cancel notices posted several hours before scheduled starting times
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  Current Access Status for the N.A.A. Observatories:

  OPEN  

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Our Next Monthly Meeting:

Date: Tuesday, September 1st, 2015
Location: Naperville Municipal Center, downstairs meeting rooms Room B & C (see Map page for directions)
Time: 7:30P.M.
Program: AAVSO Z CAMpaign
Presenter: Dr. Roger Kolman, 2nd Vice President, AAVSO, & NAA Member

Z Cam stars are a small subset of dwarf novae that exhibit standstills in their light curves. Most modern literature and catalogs of cataclysmic variables quote the number of known Z Cams to be on the order of 30 or so systems. After a four-year observing campaign and an exhaustive examination of the data in the AAVSO International Database tis data has now been trimmed by a third. One of the reasons for the misclassification of some systems is the fact that the definition of what a Z Cam is has changed over the last 85 years to what it is today. This has caused many stars formerly assumed to be Z Cams or rumored to be Z Cams to be eliminated from the final list. In this month's presentation Dr. Kolman will present the results of the investigation into 65 stars listed at one time or another in the literature as Z Cams or possible Z Cams. Dr. Roger will discuss the findings of the AAVSO ZCAMpaign

Dr. Kolman is the 2nd Vice President of the AAVSO and has been an active member since 1962 serving on their Council and contributing nearly 80,000 visual observations of variable stars to their International Database. He holds a PhD in physics from the University of Illinois. He has taught physics, mathematics, and astronomy at the secondary and college levels for 39 years and teacher education at the graduate level. Currently he teaches astronomy at Harper College in Palatine, Illinois. He is also a long time member of the NAA.

The public is welcome to attend, free of charge.


 

Our Next Astronomy Fundamentals Program:

Date: Tuesday, September 15th, 2015
Location: Naperville Municipal Center, downstairs meeting rooms Room B & C (see Map page for directions)
Time: 7:30P.M.
Program: Autumn Constellations
Presenter: Jim Hopkins, President, NAA

As the summer triangle flies past the zenith and begins to sink in the west in the autumn skies, we see harbingers of winter rise in the east: Orion led by the Pleiades. And the great showpieces, the Andromeda Galaxy and The Perseus Double Cluster, rise higher above the horizon haze. The crisp cool nights of the fall months, as darkness falls earlier, are great times for observing (and if the winters keep up as they have, these will be the last comfortable views of those constellations till early spring).

The Astronomy Fundamentals talk this month will be club president Jim Hopkins’s presentation on knowing and viewing the constellations of the season and some of their showcase objects.

The public is welcome toThe public is welcome to attend, free of charge.


   

The next meeting of the NAA Executive Board will be September 8th at the Culver's Restaurant 60504, Naperville (Rt. 59 & 75th St.). Starting time 7:30pm; all N.A.A. members are welcome to attend.



 
 

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