Files Contributed By Members and Friends
The following files have been generously contributed over the last several years. They are sorted by category and date. Large files or those that download have file sizes provided.
Waxing Gibbous Moon
Images
Web Pages
Presentations
Spreadsheets
ZIP Files
Acrobat Documents
Word Documents
Images
Comet McNaught's
dust tail "rays"
As reported by Doug Slauson, the photo was taken January 19 west of the
town of Norway. It shows the rays of the tail of Comet McNaught. The re-emergence
of the tail in our skies has caused quite a stir with Northern Hemisphere
observers as the head of the comet is presently invisible from the Northern
Hemisphere. The head of the comet (in the southern constellation Microscopium)
set over an hour before sunset; 2 hours and 40 minutes before he took this
photo! Yet the tail in the photo stretches 20 degrees up from the horizon
into Aquarius. Posted on 1-23-07
Northern Lights in December
Some gorgeous images of the aurora borealis (the downloadable ZIP file is about
4MB and contains three images) as photographed by Alan Atwood on the night
of December 14–15.
Posted on 12-18-06
NGC
891 in Andromeda
Image of edge-on spiral galaxy obtained with digital camera. Contributed
by Doug Slauson. Posted 10-15-06
Rockwell Collins Retirees
Newsletter
Scanned image of April newsletter featuring EIOLC. Contributed by Dick Plasencia.
Posted 04-24-06
Spectrum of α Aquilae
(Altair)
Color spectrum showing hint of absorption lines. Taken with a hand-held digital
camera. Posted 08-09-05
The Waxing Crescent Moon with Venus
Image taken with digital camera and binoculars. Contributed by Doug Slauson.
Posted 08-08-05
Drawing of Messier 11—the "Wild Duck" cluster
October 2004 drawing of the open star cluster by Doug Slauson.
Posted 08-08-05
Comet Hyakutake c/1996 B2
Photo of Comet Hayakutake taken in March 1996, by Doug Slauson.
Posted 08-08-05
False-color images of M51 showing
supernova SN2005cs
These false-colored images are from an image taken by Doug Slauson using
a SGIB STV CCD camera. These images are from a single 40-second exposure
with a dark frame subtracted. No filter was used during the exposure. Posted
07-05-05
Image of Jupiter
This image was taken by CAA member Alan Atwood using his telescope and the
new Meade LPI CCD camera. Posted 5-24-05
Third Annual Iowa Convention
of Amateur and Professional Astronomers (1.0 MB)
Group photo of attendees to the convention hosted by the CAA less than a year
after the society's founding. Members from Cedar Rapids, Dubuque, Des Moines, Marshalltown
are seen as are others, including our keynote speaker, Dr. James
A. Van Allen of The University of Iowa. Contributed by Doug Slauson.
Posted 3-28-05
December 21, 2004 Machholz Mosaic
Mr. Glinch has been at it again, this time posting a mosaic of images that
show structure in the tail of the Comet Machholz. Posted 12-30-2004
December 14,
2004 Picture of Comet Machholz (210 kB)
Gary Clinch has been photographing Comet Machholz, and has a nice image available
here. Posted 12-15-2004
Aurora Photo by Heinz Blankenhagen
Heinz also contributed a nice picture from the Sunday, November 7, 2004 auroral
display. The photo was taken with a Nikon F3, fl 35mm at F2.8 with a 2
minute exposure. Posted 11-10-2004
Owl Ridge Observatory
Doug Slauson's observatory and principal instrument, a Celestron 9 ¼-inch (23.5 cm) Schmidt-Cassegrain. Auxillary equipment
includes an SBIG STV CCD camera, digital video recorder, Miranda Laborec
35mm SLR camera and custom-made DIX position angle protractor with a Meade
12mm illuminated graduated reticle eyepiece. Posted 1-06-04
Links to Web Sites
Fr. Kemble's Procedure for Celestial Pole Alignment
Web link to Fr. Lucian Kemble's procedure hosted by the Calgary
Centre of the Royal Astronomical Society of Canada. This procedure also
includes a variation to allow "daytime" polar alignment of your
telescope's equatorial mount. Posted 07-14-05
Presentations
PowerPoint Slide
A slide for inclusion in CAA PowerPoint presentations regarding the joint
relationship between the CAA and the Linn Country Conservation Commission.
Contributed by Dennis Goemaat of the L.C.C.C. Posted 07-12-05
Adobe Acrobat File
Slides from Jim Jezek's July 14 presentation on tracking artificial satellites
with active links. Contributed by Jim Jezek. Posted 07-15-07.
Spreadsheets
Eyepiece Analysis (30kB)
This Microsoft Excel spreadsheet computes relevant parameters of telescope
eyepieces. Submitted by CAA member Jeff Finley.
Posted 5-16-05
Compressed "ZIP" Files
Boller & Chivens
photos (mount support)
This .zip file has three pictures Jerry sent in that illustrate some of the
issues regarding mounting support for the B&C scope.
Posted 12-30-2004
November 7,
2004 Aurora Photos by Alan Atwood (454 kB)
Check out Boomer's photos of the big aurora storm on Sunday, November 7,
2004. Posted 11-10-2004
Lunar Pictures by Jerry
Warner (160 kB)
Lunar photos taken 24-Oct-2004. Jerry comments: "I
shot these Sunday night using the 6" f/15 refractor, 5" f/5 refractor
piggy backed on the C16, and the Meade LX-200. All at prime focus using an
840 ToUCam. Conditions were very turbulent. These are all unstacked unprocessed
raw frames. I just selected some of the better frames that came out."
Posted
10-27-2004
Celestron-16 Optical Performance
and Collimation (235 kB)
A set of pictures contributed by Jerry Warner that show the optical performance
of the society's C-16 over a 3-hour cool down period. See this link (Yahoo
group members only) for details.
Posted 10-6-2004
Meade LX-200 Optical Performance
and Collimation (368 kB)
A set of pictures contributed by Jerry Warner that show the optical performance
of the society's 16-inch LX-200 over a 3-hour cool down period. See this
link (Yahoo group members only) for details. Posted 10-5-2004
Adobe Acrobat Files
An opinion from KCCK's Dennis Green about Iowa Public Radio
An article by Mark Jayne from KCCK addressing the movement within the state
of Iowa to convert radio stations such as KCCK into a network of radio
stations called Iowa Public Radio.
Posted 12-20-2004
Microsoft Word Documents
Shooting NGC 7331 (751 kB)
Another night of astrophotography related by Gary
Clinch. He starts off targeting Stephen's Quintet, but winds up with a
great picture of NGC 7331.
Posted 12-15-2004
Nicknames of Planetary Nebulae
A list of common nicknames for over 120 planetary nebulae,
along with notes on the origins of many of the names. Created by Kent
Wallace, Revision 2, September 23, 2004. Posted
9-24-2004
Pluto Challenge (689 kB)
Gary Clinch's quest to photograph the Solar System's smallest, most elusive
planet. Posted 9-2-2004