At the May Meeting... Don Surles brought the meeting to order
at 7:15 with 19 members and guests attending.
New Members:
Carl J. Roberts, Allentown PA
Jo Ann Beasley, Rehoboth Beach, DE
Observer’s Handbook- Greg Lee gave us our
long overdue Observer’s Handbook briefing. He chose the section devoted
to Designation of Comets on page 218 of the 2002 handbook. In 1994
the IAU changed the way in which comets were designated. In the old system,
the comet was designated by its order of discovery or recovery in
a given year. Comet Halley was the 9th comet appearing in 1982 so
it was designated 1982i. When the cometary information was complete,
the comet also received a Roman numeral designation based on its order
of perihelion passage. Thus 1982i was also 1986III.
Under the new system, the year is divided in periods of half months
starting with A and ending with Y and omitting the letter I. To these suffix
letters, prefix letters were added to indicate status. These status letters
were C (long period) P(periodic) X
(no orbit computed) and D (disappeared).
The Shoemaker-Levy comet, which crashed into Jupiter, is
now known as D/1993 F2.
Nomination of Officers- May is the time for annual nomination
of club officers to be elected in June.
This annual election of officers has 2 major problems;
(1) We do not have enough local people willing to accept the positions.
(2) Certain positions like President and Treasurer could suffer from
the loss of annual continuity.
While we dutifully nominated the appropriate candidates, it was done
this year with the intent of changing our by-laws ASAP so that the
only elected positions in the future would be members of a
board of directors.
The candidates nominated were:
President......................... Don Surles
Vice President...................Lyle Jones
Secretary....................Keith Lohmeyer
Treasurer......................Kathy Sheldon
Since they were nominated unopposed and the nominations closed, they
were therefore elected defacto.
This now clears the way for revising our club by-laws to provide for
the creation and election of a board of directors, who in turn, will
proceed to appoint the officers. To avoid any misunderstanding
, the only need for a board of directors is to free the the officers from
the discontinuity imposed by annual elections.
Improved Tuckahoe Observing Facitlities
Don Surles prepared an outline on this subject which I’ve abstracted
below:
WHAT: Small secure building to store equipment and provide
shelter for Stargazers and provide facilities for public nights.
WHERE: Baseball field area or field on the south side of Crouse
Mill Rd, across from the lake (dedicated area for stargazing only).
WHEN: ASAP.
WHY: To provide shelter for Observers and increase the
use of Tuckahoe State Park by Amateur astronomers. To promote amateur astronomy
and science education in the community.
HOW: Funding by Delmarva Star Gazers (gift, annual fees, other).
Manpower by Delmarva Star Gazers (public nights, other).
Equipment by Delmarva Star Gazers (who retain control and ownership).
ISSUES: Legality of our commitment to State Park and
visa versa.
ACTION: Establish a committee to expand and firm
up our proposal. Committee composed of D. Surles, J. Morris,
F. Prettyman, and DSG volunteers.
Meet with Park Supt. and other community officials/reps to discuss
possiblities. The "Tuckahoe committee" is scheduled to meet
at Tuckahoe Saturday afternoon(May 18) to review some possibilities aimed
at improving our observing conditions.
Video Astronomy
Doug Miller played tapes he made recently with a super low-light
video surveillance camera, the PC164C, available from Supercircuits (www.supercircuits.com,
$130). A small C-mount lens on the camera attached to a tripod was all
that he needed to tape (using a standard consumer-grade VCR) Comet Ikeya-Zhang
setting behind trees in the evening twilight. At prime
focus of an 8" S-C, the camera recorded dramatic detail of craters
on a crescent Moon. The automatic gain feature makes lunar imaging easy,
but limits its use on planets. As a finale, Doug played a short video sequence
of an Iridium "flare" or sun glint, again using a wide-angle C-mount lens.
By the way, this is the same camera that Bob Stewart displayed at the Mirror
Making Workshop and is still a hot topic on the IOTA web site and the
video astronomy Yahoo group.
Now that Doug and Tom Pomponio have purchased these cameras, look for
more video astronomy in coming months.
Constellation of the Month: Bootes
The scheduled presenter did not show up so the group decided to to
wing it. Mythology was not included so I add below a
brief summary from a previous presentaion.
Mythology: Bootes, aka Herdsman, aka Arcas.aka Arcturus
in one version is leading the dogs of Canes Venatici in driving the Bears
(Ursa Major & Minor).
Astronomy After Arcturus was mentioned as the alpha star, our
knowledge of Bootes quickly gave out and we proceeded to visit surrounding
constellations and objects. Among the constellations, were. Serpens
Cauda, Hercules, Ursa Major, Canes Venatici, Coma Berenices and Virgo.
Among the objects discussed were the globular clusters M3, M5,
the spectacular M13
and M53. There were also tips on locating objects in relation
to other stars. Often the object will
be one of the points of an asterism (e.g. equilateral triangle). You
can also locate objects using astronomical reference points rather compass
coordinates. (i.e. Did you know that M13 is located on the Bootes
side of Hercules?)
Telescope Drive Systems
Below is a brief summary of telescope drive systems:
Types of Drive Systems
None – the Dob is an example of this. No motors, no gears
– all movement is by hand in right ascension and declination.
Synchronous motors – normally found on German equatorial mounts.
Can be AC or DC. Normally, they run at a fixed rate and generally
compensate for earth’s rotation. Satisfactory for visual work; very
difficult to use for photography.
Quartz controlled motors – more precise monitoring of speeds;
normally a drive corrector is provided for long term precise guiding on
an object.
Stepper motors – movement is controlled in precise “steps”.
Most popular mount using this type of motor is the “Super Polaris” family.
ETX series uses this type for simulated goto drive.
Computer controlled – goto – systems is a set of RA and DEC
motors controlled by a computer
that allows for the scope to be pointed precisely. Found in the
LX 200 and Ultima 2000 series of scopes.
Poncet mount – a platform for a Dob that allows the Dob to track
in RA for short periods of time.
Dob-driver – set of motors and controller that allows the dob
to track in RA and DEC.
From the President’s Desk...
Drought busters! Have you noticed the lack of clear nights during
the recently declared drought? It seems most of the days have
been very clear but with clouds that are just below the horizon as the
Sun sets and then the clouds just “rise up” to claim the night sky.
Is there a relationship between the inches of rain that did not fall and
the number of cloudy nights?
This morning we are receiving a drought buster – a general, heavy-duty
rain that should change the equation. I predict some clear nights
soon – probably around the full moon!
What is the lure of stargazing? Why do you and I return to the
open field every new moon? Most of us have seen our favorite M-objects
many times, split double stars, hunted down the faintest fuzzies, fed mosquitoes,
danced around to warm up, put off sleeping, etc. Why do we come back
and do the same thing over and over? Probably each of us will have
a different
answer to the question; but, the important point is that we will have
an answer. That’s what makes us amateur astronomers, ie, stargazers.
Every hobbiest eventually must ask the same question and satisfactorily
answer the question or move on to another hobby. Bike riding horseback
riding, golf, fishing, auto racing, airplanes, all hobbies have some form
of repetitious
activities. We must find a way to decrease the effect of repetitions
by continually changing our approach to stargazing.
There was a time when “observing” meant a 60mm refractor or a 6” f-8
reflector in our back yard, a couple of inferior quality eyepieces, the
solitude of yourself and the night, a couple of star charts, etc.
Our approach today is much different: 20”-30” scopes, large groups of
people, fancy “spacewalk” eyepieces, computers and motors to point the
scope, fancy cameras to capture images in incredibly short exposure times,
skies that are not as dark as they could be, filters, coatings, the internet…our
hobby has changed dramatically. Will it continue to change?
I see no reason why change should cease; in fact, I believe the rate of
change will continue to increase and that is where I see the challenge.
Communications capability is increasing with the electronic improvements
that are flooding the consumer market. With improved communication
comes the possibility of improving the sensitivity of our insruments and
the possibility of remote control of equipment used to view the wonders
of the night sky. The most important part of the statements above
is that the price for these products is reducing rapidly as the quality
and capabilities of the products are increasing very rapidly. Our
challenge will be to educate ourselves about the products and choose those
which will continually improve our stargazing experience. I am sure
our organization has the talent, the will, and the perseverance to successfully
choose and implement those technologies that make sense for amateur astronomers.
We have a proven track record that is impressive in this arena; we will
build on our successes Just stay tuned and ready to grasp those opportunities
as they become available.
Our next meeting discussion will center around the constellation Ophiuchus
and preparing for your next observing session. Ophiuchus is a very
interesting constellation from an astronomical and mythological viewpoint
– this one should be fun to review. Preparing for an observing session
can make a tremendous difference in the comfort of the observer and the
success of hunting down the elusive critters that inhabit the night sky.
Please plan to attend and make your contribution to the meeting.
We have a new slate of officers for next year. They are:
Kathy Sheldon - Treasurer, Keith Lohmeyer – Secretary, Lyle Jones – Vice
President, and Don Surles – President. We are anticipating a change
of structure that will provide an opportunity for expanded input from members
and segments of our organization. This change should take place over
the summer and
be in place by September. Also, we will make plans during the
summer for next year, ie,establishing the goals for our organization and
a schedule for accomplishing those goals. Stay tuned…for the exciting
unfolding of our 10th year.
Til next month – see you at the Church or Tuckahoe. Don…
The Editor’s Quadrant....
The Planets in June
Mercury returns from conjunction with the sun and by the end
of June is rising almost 2 hours before the sun.
Venus dominates the June evening sky from sunset until 11:00
p.m. Mars and Jupiter set ever earlier in June until
by the 30th they both set around 9:30 p.m. Saturn emerges in mid
June from conjunction behind the sun and joins Mercury as a morning
star (see chart below).
As for the remaining planets, Uranus is in Aquarius and Neptune
is in Capricornus and Pluto will be found in the southern part of
Ophiuchus.
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 remaining meeting dates for 2002
will be: June 04, July 06, Picnic at Tuckahoe, August 06 to
be announced, September 03, October 08, November 05, December
03
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 monthly observing days left for the year 2002 will be: June
07, July 12, August 9, September 9, No-Frills VII October 2-6, November
1, and December 6.
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 weather links 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
www.delmarvastargazers.org
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