At the December Meeting
Don Surles brought the meeting to order at 7:15 with 14 members and
guests attending.
Outreach:
Killens Pond November 16-17 The scheduled all night presentations
and Leonid Observations were cancelled because of inclement weather.
Shehan Audubon Sanctuary December 4
This Under the Stars astronomy presentation, scheduled at the dark
sky site near Easton MD for Wednesday, Dec. 4, was rescheduled for Feb
7, due to weather. The program starts at 7:00 p.m.with
Stargazing activities and ends around 9:00 p.m. with drinking coffee and
hot chocolate around a campfire.
AstroBreakfast scheduled tenatively for Jan 18th.
Constellation of the Month- Pegasus (PEG-a-sus) Presented
by Tim Milligan
Tim gave a short slide presentation that highlighted the Mythology,
interesting stars and Deep Sky objects of Pegasus. Pegasus, from
Greek mythology, was the winged horse that Perseus rode to rescue Andromeda
from Cetus the Sea Monster.
Tim listed the number of Pegasus objects from popular catalogs to include:
PGC (3250 galaxies), NGC/IC (443 objects), Messier (1), and USNO WDS (2260
multiple stars).
Tim then discussed the variable star AG Pegasi, a Symbiotic star
system with a massive B type subdwarf and a M type red giant. The
symbiotic nature, matter exchange, is what drives the system's variability.
The presentation then moved on to DSOs. First up was the only
Messier object, the globular cluster M15. At Magnitude 6 and
30.6 thousand light years away, this globular has a bright core and a planetary
nebula (Pease 1). Next up were two galaxy clusters: the Pegasus I
cluster - 11 bright galaxies at 250 million light years distance and Stephan's
Quintet - 5 faint galaxies, 4
gravitationally bound, at 297 million light years distance and another
(NGC 7320) optically aligned with the group at 43 million years distance.
Program: Eyepieces
Don started with the list below showing the wide variety of eyepieces
available. All were offered in the American 1.25” size with the American
brands also being offered in the 2.0”size. Only the foreign brands were
also offered in the 0.965 “ size.
This bewildering array of eyepieces have evolved as the focal ratios
of the telescopes themselves become ever faster and the focal lengths ever
shorter. If all scopes were f8 or higher we might get by with just
the ortho or plossl designs.
Fortunately all of the eyepieces can be reduced to variations
of 5 basic types which are depicted schematically below:
Don summarized all of this with:
Rules to Live by:
1-Long Focal Length Scopes ( f 7+) are forgiving in eyepiece design
They are not made for wide angle viewing but for high power viewing. Orthos
do well.
2- Short Focal Length Scopes are not forgiving in eyepiece
design They are made for deep sky low power viewing and are prone to
coma, poor collimation etc. They are normally larger diameter lower quality
optics.
Go for the super corrected space walking eyepieces.
3-Old eyepieces are not better than new ones Modern eyepieces
are much better.
4- Demand Anti-reflective coatings The more the better.
5-Be Critical Don’t assume a good brand name is a good eyepiece.
Compare it with others and if
you are not satisfied send it back.
6-Protect your investment Keep dry in a foam lined case Clean
sparingly with cotton Q-tips
From the President’s Desk....
December 21, 2002
‘Tis the season…I hope you had a Merry Christmas and are having a Happy
New Year! Seeing family and friends at this time of year is so enjoyable
and is the catalyst for making some of our best memories. This is
one of our rewards for a year of hard work. Enjoy your time with
your friends and family.
2003 is going to be a great year – when we look back on 2003 fond memories
will be plentiful. Before we jump ahead lets back up and survey what’s
in store for Delmarva Star Gazers. First, I hope each one of you received
many astronomical gifts for Christmas. And if you did, I want you
to remember that sharing is great for your stargazing buddies – actually,
sharing is one of the greatest pleasures of stargazing regardless of what
Santa did or did not leave under the tree.
I am looking forward to our first couple of stargazing sessions. What
is significant about 2003? It’s our 10th anniversary!
Yes, Delmarva Star Gazers will be 10 years old in April. So,
we must have a birthday party. We need a birthday party
committee…this is a solicitation, a request, a draft notice, and an
opportunity for our socially oriented and talented members. Please
step forward and show us your skills in action. We need you!
Other events for 2003 include the Audubon Society star party that has
been rescheduled to February (Lyle will fill in the details later), our
mirror making weekend Feb 28-Mar 2, Delmarva Star Gaze IX in April, Mars
at its closest distance to Earth in 50,000 years, comets, atmospheric phenomena,
new scopes, good food, stargazing with your fellow Gazers, and then there
are the unknowns that make our hobby so interesting.
Last week Karen left a message on my business phone that we had received
a package from Burgess Optical. Six of us Star Gazers have been waiting
since our Spring star party for some 25X100 binoculars from our friend
Bill Burgess of Burgess Optical. My first question to Karen was “Is
it one or six binos?” and her response that the package weighed 37 pounds
led me to the conclusion that we had indeed received six binos.
When I finally arrived home and dug into the large package I found
it was double boxed with peanuts between the boxes – packed very well.
Then there were individual boxes that contained the “substantial” bino
cases. Bottom line, there was only two binos in the huge and heavy
package.
Historically, 25X100 binos have been $1000-2000 for quality that just
didn’t seem good enough. Historically, the field of view has been
very narrow and eye relief uncomfortably short. Overall, the
large binos have historically been a disappointment.
But Bill Burgess is a salesman who knows what amateur astronomers want
in their toys. We took a chance on Burgess Optical – he had only
a picture of what the bino would resemble and a description of the optical
system when we placed our order last April.
Now, after a couple of days and nights playing with the bino I have
to confess that his Chinese made bino is very satisfactory in both quality
and price. The FOV is huge, eye relief is comfortable, collimation
is “right on”. These glasses are NICE! They are a pleasure
to use. If you get a chance to peer though a Burgess Optical
25X100 please do so – I think you will be
impressed. You will need a substantial tripod because they are
HEAVY and at 25X they cannot be held steady. A parallelogram
mount would be a nice addition. I look forward to other products
for amateur astronomers from Bill in the near future.
Last night Doug Norton and I experimented with the bino and various
filters used on only one of the eyepieces. We learned the brain can
process both a filtered and unfiltered image to create a single image.
I can’t wait until a moonless night under dark skies to check out the nebulae.
We have received a shipment of 2003 calendars and Observer’s Handbooks
from the Royal Astronomical Society of Canada. They will be available
at our January meeting. The calendars are $7 and the Handbooks
are $15 each. Please see Kathy to purchase them.
We have also received a very nice german equitorial mount, tripod and
dual axis drive for our prominence scope. The mount is sold by Orion;
another nice piece of equipment from China. I will bring it
to the January meeting for your review.
Our January meeting will also focus on amateur astronomy magazines.
We will review Astronomy, Sky & Telescope, and others. “Others”
are important because we need competition so that amateur astronomers have
information from several viewpoints covering all aspects of our hobby.
Well, enuf for now. See you at the January meeting, Don
The Editor’s Quadrant....
The Solar System in January
Mercury- goes into conjunction with the sun on January 11. It
will be briefly visible as an evening star at the beginning of January,
low in the WSW and as a morning star at the end of January, low in
the SE.
Venus will be a morning star in January, rising around 4:00
a.m. Around January 11th, it will show its crescent phase.
Mars- rises near Venus as a morning star in the beginning
of January. It is still too dim and too small to show much detail.
Jupiter rises at dusk during January and is visible all night,
transiting after midnight.
Saturn is visible in January from dusk through most of the night,
transiting around 11:00 p.m. at the beginning of the month and 9:00 p.m.
at the end of the month.
Both Uranus and Neptune are still in Capricornus
and Pluto has emerged from conjunction with the Sun in December.
Clear Skies!, Frank Sheldon f.a.sheldon@att.net
Club Activities..
Club Meetings- We meet in the First Presbyterian Church in Smyrna,
DE (653-8000) on the first
Tuesday of each month from 7-9 PM. From US 13, turn west at Wendy's
and go one stoplight on
Commerce Street; the church is on the right directly across from the
Fire Hall.
Future Meetings...The meeting dates for 2003 will be:
January 07, February 04, March 04, April 01, May 06, June 03, July
05 (Picnic at Tuckahoe),
August 05 (No meeting at church - schedule special event) September
02, October 07, November
04 and December 02 The regular meeting format includes discussion of
club activities, observing
highlights and an advertised presentation. We solicit suggestions for
topics and presenters.
Club Observing... Observing is (usually) scheduled for the Friday
nearest the New Moon to
maximize the hours of deepnight without the moon
in the sky. Unless otherwise stated, the
monthly observing site will be at the baseball field in the camping
area at Tuckahoe State Park.
The observing days for the year 2003 will be: January 3, January 31,
February 28,
April 4, April 30 - May 5 (Star Gaze IX), May 30,
June 27, July 25, August 1, August 29, September
24 - 28 (No-Frills VII) October 24, November 21, December 19.
The cloud or rain date for the
monthly Friday observing will be the following Saturday, but don't
trust the weather man! Go
outside and look for yourself or check the CNN weather link on our
web page. If you still can't
decide, Call Don Surles (302) 653-9445 or Lyle Jones (302) 736-9842.
Delmarva Star Gazers Officers for 2002-2003
President.......................Don Surles 302 653 9445
Vice President..............Lyle Jones 302 736 9842
Secretary.........Keith Lohmeyer 410 482 6077
Treasurer............Kathy Sheldon 302 422 4695
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