Observing in Winter

Pj Riley 

Good news - as the night gets longer, you have more opportunity to observe.  Bad news - the nights also get colder! Brrr! (gave me a chill just typing it). 
I have learned two basic rules in life that apply to winter observing - one, common sense isn't that common, and two, state the obvious.  So I have included a partial reprint from NASA. 
It contains information about how to dress when outside in cold weather.  Even though it is common sense, and obvious, I feel it's worth a read.  I don't know 'bout y'all, but I have suffered frostbite - it isn't fun !  I expect you to reach spring without frostbite! 
The article refers to observing an eclipse, but the info applies equally to stargazin'.... 

Dressing for Cold Weather

"Cold weather requires considerable care in dressing. The secret is to use loose layers of clothing, leaving lots of room for air pockets to trap heat where it is wanted. Never underestimate the penetrating power of the cold - you may be able to walk about at -20° C at home, but you will be much less active during an eclipse and the cold will penetrate after an hour or so. Wear thermal underwear, pants and an outer covering (skidoo pants or even carpenter's coveralls) on your legs. A good winter jacket, preferably down-filled, will keep you warm above, but layers of undershirts, shirts, and sweaters, covered by a winter coat will do. Big friends with large ski jackets will help here, but ski wear is not suitable by itself to handle the low level of activity when observing in the cold. 
Feet deserve special attention, but the technique is similar to other parts of the body. Use layers: socks, woolen work socks, down or woolen booties, then a large pair of winter boots to cover it all. Try to keep it loose if possible to trap warm air and allow your feet to move and warm up. Don't neglect the underside of your feet - pick boots with a good thick insole to block cold coming up through the bottom. 
Gloves should be thin to handle the small parts of the telescope, but your hands will probably be cold nevertheless. Thin gloves under a larger pair of mitts work best. Mitts with one or two fingers (usually sold in hunting shops) are warmest, and fingers can easily be extracted from the mitt to

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From the President....

Lyle Jones
The Holiday Season is almost on us! This year has sure flown by.  This Fall we have had some great skies for viewing. I hope that you got out and did some.
Kathy Sheldon and I are looking for entertainment for the Stargazers' Annual Christmas Party, which will be held on December 10th at the Presbyterian Church in Smyrna from 2:00 to 5:00 PM.  Kathy is also planning the white elephant present exchange so save your junk!  For those of you who have not been there before, the Stargazers supply turkey, ham and drinks plus the plates and eating utensils.  It is always a fun afternoon. 
If you want to grind a mirror in March 2006, be sure to get up with Don Surles (302-653-9445).  Slots are filling up quickly. In fact, one individual is coming from Hawaii. 
Those of you who did not attend the November meeting missed a great presentation by Dave Groski on off-axis telescopes.  Our program for December will be "What is new in astronomy for this coming year?" Don Surles will handle the new products while Jerry Truitt will handle astronomical events for the upcoming year. Tom Pomponio will do a short program on his modification of the CCD camera for astronomical pictures.  For January Dan Kennedy and Chris Abramowicz will do a program on the Chesapeake Bay Impact.  It should be a very interesting program.  The Stargazers still have a few 2006 astronomical calendars and Handbooks for sale.  If you're interested, contact Don Surles. For those members attending our monthly meetings, how are they? Doug Miller had some helpful suggestions on the meeting format. If you have any suggestions, please let me know. 
On Sunday, November 12th I helped a young couple with their Meade Autostar 4 inch reflector.  It has been in their closet for three years.  Their scope was badly mis-aligned

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Volume 12 Number 06
Solar Viewing
The Amateur Astronomy Way

Don Surles

Looking at the Sun can be very interesting.  The Sun changes it's appearance routinely and presents a different portrait depending on the wavelength of EMS one chooses to view.
A word of caution before attempting solar viewing…please do it safely.  Always use the proper filter to eliminate the Sun's harmful radiation that can severely damage the human eye.  My rule of thumb is to filter the "aperture" end of the scope or bino thus ensuring the harmful radiation is not introduced into the viewing instrument.  I always filter my finder scope and remove the Telrad (to prevent the possible destruction of the Telrad reticle).  Another good idea is to carry and use a pair of solar glasses to protect your eyes from sun glare and to ensure you have "spot free" vision when looking through the eyepiece.
The most popular filters are white light viewing and are normally made from aluminized glass, aluminized mylar, or Baader "solar film".  The #9 welder's lens is ok but does not perform as well as the other mentioned above.  These filters can be used safely with refractors, reflectors and binos.  These filters will show sunspots and granulation on the sun's surface.
The Herschel Wedge:  The Herschel Wedge is a shallow triangular piece of glass with optically flat surfaces. The surfaces are set at an angle of about 3 degrees. The wedge is used to reflect light from the forward surface into the eyepiece, while light from the rear surface is reflected out of the eyepiece field, preventing double images. HERSCHEL WEDGES ARE NOT SAFE WHEN USED ALONE. The 3% to 5% of the light reflected into the eyepiece is still intense enough to require filtration. According to various authorities, the use of a #12 welder's glass as a secondary filter is safe. Those wanting to use Herschel wedges are advised to make independent measurements of what level of additional filtration is safe.
The Herschel Wedge is only recommended for use with refracting telescopes, NOT Schmidt-Cassegrain, Maksutov, or any other Reflecting Telescopes. 
Today there are relatively inexpensive scopes for viewing the surface and prominences.  The Coronado SunScope is a good example that works well.  The DayStar filter accessory for your scope also works well but costs a bit more.  And if you were fortunate and built a "Prom" scope at our MidAtlantic Mirror Making Weekend then you have an excellent scope

for viewing prominences only.
The Internet is a great source for information about solar viewing.  There are live and almost live images of the Sun in just about any type of wavelength ranging from infrared to x-ray.  A quick check on www.spaceweather.com or www.spacew.com or some of their links will normally yield the information you are looking for.  And if the Sun is quiet you have saved yourself the setup and takedown of your scope.  Don't forget to Google…
Bottom line, solar viewing is a lot more fun today because we know when to look via the Internet and we have options on which part of the EM spectrum to do the viewing.  Equipment is relatively safe - if instructions and common sense are followed.  Equipment is also much less expensive today vs a few years ago.

So, stay safe and enjoy the view - often!            Don…

November Meeting Notes

Jerry Truitt

President Lyle Jones opened the November meeting of the Delmarva Stargazers with a group discussion on what's up. Various members contributed with their recent observations plus we had some discussion about what's been on the Yahoo site as well.
There was of course a lot of talk about Mars. Quite a few members had witnessed bright fire balls and gave their account of what and when they had seen them.
Several members had commented on what a great job Pj Riley has done with our newsletter. This has been done in large without much help from the membership. Anyone with something to contribute please step up and help Paul make our news letter even better.
Lyle is still working on getting a trailer for the club. This will be used to both store and transport club equipment.
Don Surles is running the Mirror Making event this year. Don says people are starting to sign up already. He also noted with have a new distance record as we have a person who works at the Keck signed up. So he'll be coming all the way from the Big Khuna Hawaii.
The Christmas Party is December 10th so please plan on attending. Family is welcome too. We're still looking for entertainment so if you have any ideas let Lyle know via e-mail.
Don did a great presentation on Solar observing. Don pleaded for us to remember to filter first and make sure that

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How to Join the Delmarva Stargazers: Anyone with an interest in any aspect of astronomy is welcome
NAME________________________________________________________________________________________
ADDRESS_____________________________________________________________________________________
CITY, STATE & ZIP______________________________________________________________________________
E-MAIL ADDRESS (If any)_________________________________________________________________________
Please attach a check for $15 made payable to Delmarva Stargazers and mail to Kathy Sheldon, 20985
Fleatown Rd, Lincoln, DE 19960. Call club President Lyle Jones at 302-736-9842 for more information.
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Volume 12 Number 06

Your 2005-2006 Officers

Office  Officer  Phone  e-mail
President  Lyle Jone  302-736-9842 lyjones@state.de.us
Vice President Jerry Truitt  410-885-3327 truittjs@netscape.com
Sec. & Editor Pj Riley  302-738-5366 pjr127@yahoo.com
Treasurer  Kathy Sheldon 302-422-4695 f.a.sheldon@att.net

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Volume 12 Number 06

        Astrophotos
Joe Morris

Both photos were shot with a 5 inch refractor on a polar aligned GEM mount. 
The camera was a Canon Rebel XT.  Both were a stack, using Registax, of nine pictures that were dark subtracted. Both were tweaked in Photoshop with levels and curves.  Both were Gaussian blurred and lastly sharpened. 
The moon shot was a 1/100 sec exposure at ISO 100 and the M45 shot was a two minute exposure at ISO 800.
The combination of the f6 telescope and large chip in the camera make nice widefield astrophotos pretty simple.

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adjust telescopes and cameras. Watch out for cold metal surfaces on eyepieces and mountings. More than one eyelash has succumbed to contact with an eyepiece, and exhalation in the wrong direction can fog an eyepiece for several minutes. Keep a spare one warm in an interior pocket just in case. 
Heads and ears should be covered, but a simple scarf will do if more substantial clothing is not part of your regular wardrobe. Hoods are better, but they will probably be pushed back out of the way during the eclipse so have a thin toque or other covering for the critical moments. Be prepared to take a few minutes before second contact to jump about and warm up so that you are prepared and warm enough for totality. You might look a little foolish flapping your arms and running about, but the warmth it generates will do wonders for your comfort during the critical moments. " 
  Reprinted with permission from Total Solar Eclipse of 1997 March 9, Espenak and Anderson, 1995
For additional information about heating accessories and other winter tips, please go to: 

http://www.rocketroberts.com/astro/warm.htm

The Solar System in Decembrrr

Pj Riley

On the 21st, The Winter Solstice, you have 10 and a half hours of darkness from evening civil twilight to morning civil twilight.  Imagine how many wonderous things you can view in all that time !  Sol reaches an apparent Dec. of -23º.
Mercury 2      is at greatest elongation west (21º) on the 12th.  So get up early and look in the ESE sky as Sol rises.
Venus is 2º N of Luna -on the 4thLuna -is only 12% bright that night!
Mars 5 is 1.3º S of Luna -on the 12th.  If you happen to be in NE Sibera, you can watch Luna -occult Mars 5 that night.
There will be a double satellite crossing on Jupiter 6 on the 26th.  It would be a great time to try out the new toys Santa brought you the day before except the moons cross before Jupiter 6 rises.  Bummer!
Saturn 7 is 4º south of Luna -on 19thLuna -will be bright (85%), but I know you can still find Saturn 7.
Uranus 8 is in Aquarius this month.  Neptune 9 is in Capricornus.  Pluto 0 is near Sol !, ,, so no viewing Pluto 0 this month ! 
Venus 3, Neptune 9 , Uranus 8, and Luna -(in that order) form a ~straight line on the 8th.

November Outreach

Jerry Truitt

Outreach events for November included 4 "Astronomy at the Library" nights, 1 at Bohemia Manor High School and 1 at Banneker Elementary school.
On November 4th the Perryville Library in Cecil County was clouded out but I gave an hour and half presentation and a question and answer session to about 12 people. I did another one the following Monday at Rising Sun library and many of the same people showed up and were treated to clear skies. Even under two towers of 4 each mercury vapor lights I was able to show them the moon, Mars, the Pleiades, and Albireo.
      Dick and Audrey Gardner, Jerry Truitt and Don Surles performed under the lights at the Banneker Elementary school in Milford Delaware. Don worked inside giving a presentation while Dick, Audrey and I manned the telescopes outside on a pleasant but well lit evening sky.
I'll be doing the Greensboro Library on the 16th and Cecilton Library on the 18th to pretty much end my Library program until the spring.
Anyone doing an outreach or who would like help setting one up please contact me.

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filter is well secured. Also filter your finder scope. Don suggested www.space.com and www.spaceweather.com for more information on what to look for on the sun.
The feature presentation for the night was expert telescope builder and 7 time Stellaphane winner Dave Groski on Off Axis telescope building. Dave gave us a through design and build lesson on building a scope. He presented both the pro and cons of the design. Dave offered tips on how you can turn your newt into one and how to get the best performance from it.
Jerry Truitt ended the night with some great shots from the Cassini space craft and some movies of the moons influencing the rings.
Next meeting is December 5th and features Don Surles "What New in Amateur Astronomy" and Jerry Truitt "What Up for next year". Don't miss it.
If you have something you would like to contribute or present at a meeting please contact Lyle or Jerry.

 

Magazine Subscriptions

As a paid member of DMSG, you can sign up -or- renew your S&T or Astronomy magazines through the club for a discount over private rate.  S&T, reg. $42.95, is $32.95 thru DMSG, Astronomy, reg. $44, is $34 thru DMSG.  See Pj Riley for details.

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http://home.comcast.net/~dmiller5879/moondark/december05.html