DAVID'S
ASTRO CORNER
By David
Stine
The Leonids
have come and gone for another year and from all indications they are
back to a normal level of 10-15/hr. Some of us brave souls viewed this
year's shower from the observatory and were treated to some decent
Leonids, but nothing spectacular. The highlight of the evening other
than KC's cookies was a Taurid Fireball. That one was worth the night.
Lighting up the sky at Mg. -3 the greenish fireball was awesome
leaving at least a 3 second train that twisted in the atmospheric
wind. The total number of Leonids that we did see was a dismal 13. We
also saw 6 Taurids including the fireball, and 2 sporadics. The Leonid
Storms of the past few years will only be memories for us who saw
them, as no other storms are predicted for tens of years ahead and
maybe never again. IF we have any new storms they will come from other
showers such as the Taurids. In fact there is a good chance that in
2005 the Taurids will produce a Fireball shower similar to what the
Leonids did in 1998 but not quite as intense. Time will tell as the
meteor astronomer's fine tune their predictions. The next meteor
shower for us is just a few weeks away and it is always a very
dependable shower year after year, the Geminids. This shower produces
about 120 meteors per hour at its peak, which this year will be at
5:40AM December 14th or Sunday morning. The good thing about the
Geminids is that you can start seeing the meteors early in the evening
as soon as Gemini rises which is around 7:30PM The only problem is
that we are only 5 days past a full moon that rises at 9:34PM on Sat.
the 13th and doesn't set until 11:19AM the next morning. Last year
there were more than normal earth grazers before Gemini rose, so this
may also be a good year to look for these earth grazers as soon as it
gets dark and before Gemini is up very high. At least the moon will be
East of Gemini, and we will be able to view a few moonless hours
before Luna rises. Then after, Gemini will have risen high enough so
we can view above and to the west. This is on a Saturday night and
Sunday morning, so no work to go to the next day. Plan to be at the
observatory for this event.
Two comets
are causing quite a stir around the comet community right now. Comet
2P Encke in late November was becoming a very interesting object. John
Bortle reported that the coma was a huge pale mass of dense mist that
in 15x70 binoculars spanned 12 minutes while 10x50's revealed 17
minutes. Both instruments revealed the comets sunward fan. With his
41cm Newtonian and 57x the coma seemed amazingly complex. The fan was
open nearly 100 degrees in p.a. Both edges appeared to be linear and
quite sharply bound. The trailing northern edge of the fan was
distinctly brighter than the rest and one or two other vague fingers
of light were suspected within the fan just like a drawing made in
1871, the last time the comet was this close. As John said the comet
was down right weird looking. KC Lobrecht also viewed the comet during
her trip to the Wichita Mountains and didn't have quiet the same
experience with Encke as John did. KC compared it to fog on a lens
with a bright center. The comet is now at Mg. 7 and should be fairly
easy to locate even in urban lights but remember its Mg. is
misleading, as it still is a low light object as its light is spread
out similar to M33. The comet should become naked eye range within the
next 2 or three weeks. However, it is moving rapidly toward the sun as
it heads toward us and won't be able to be viewed much longer. Check
out a recent picture at http://hometown.aol.com/tricks46/myhomepage/artgallery.html.
Here are coordinates for five-day intervals in December. Your last
chance to view the comet will be between Dec. 7 and the 12th.
Dec. 2 RA-18
15.72 DEC: +04 21.8
Dec. 7 RA-17
47.29 DEC: -02 36.1
Dec. 12 RA-17
24.19 DEC: -08 30.5
The other
comet to watch is C/2002 T7 (Linear). The comet has been brightening
and showing some interesting features. This one KC seemed to really
enjoy. She said it was a small cone shaped and at the time of her
viewing was eclipsing a faint 14th Mg. star. Greg Crinklaw of
CometChasing/yahoogroups stated that it was a terrific little comet.
It jumped right out at him at 97x appearing as a bright oblong ball
surrounded by a fainter fan shape extending from PA100 to PA130.
Within the ball lay a bright, non-stellar core. The full fan appeared
about 1.8 minutes across. With averted vision a streak could be seen
emanating at PA100, stretching about 4 minutes. A similar, but shorter
and fainter streak appeared near PA 130. This comet should be
relatively easy in a six-inch from a dark site. P. Clay Sherrod
reported the comet was seemingly developing fine structure on the SE
quadrant of the large and slightly arched coma. The tail is beginning
to extend away from the coma at PA117. You can also see a recent photo
of this developing comet at http:/wwwarksky.org/ The comet is
presently around 10th MG. Here are the coordinates in five-day
intervals for December.
Dec. 2 RA 03
02.24 DEC +36 18.1 EST. MG 9.1
Dec. 7 RA 02
40.40 DEC +35 06.6 EST. MG 8.9
Dec. 12 RA 02
19.32 DEC +33 36.7 EST. MG 8.8
Dec. 17 RA 01
59.61 DEC +31 52.6 EST. MG 8.7
Dec. 22 RA 01
41.71 DEC +29 59.9 EST. MG 8.5
Dec. 27 RA 01
25.84 DEC +28 04.1 EST. MG 8.4
This comet
will be viewable all of December and the good news it's an all-evening
comet high overhead between 8-10PM Good viewing. This one is one to
watch as it develops and brightens. I was able to view the comet from
my backyard under Tulsa urban skies with my 10-inch Dob Nov. 24th. It
was easy to locate and unique as it was moving through an open star
cluster NGC 1342. It was nebulous in appearance with a slight
extension from the coma. It was interesting to watch as it moved
through the cluster for about a 2 hour period I estimated it to be
about 10th mg., but that was from Tulsa lighted skies, so in a dark
location I am sure I would probably increased my brightness
estimation.
Since we are
on comets, how would you like to have your name be shot onto the
surface of a comet to be there forever? Well you can. In December 2004
NASA plans to send the Deep Impact Space Craft to Comet Tempel 1. When
it arrives on July 4, 2005, it will eject an impactor deep into the
surface producing a 7-15 story crater. On this impactor will be a
protected CD with names of people that would just like to be a part of
this event. If you would like to have your name go to this comet go to
the site: http://deepimpact.jpl.nasa.gov/sendyourname/index.html And
follow directions. It's free and fun and you can even print out a
certificate to hang on your wall showing that your name is going to
Comet Tempel 1. Something to put in your astronomical families
Christmas sock this Christmas.
The Sun
continues to be very active. Just a few days ago CME's that arrived at
earth produced more auroras as far south as Arkansas. There are now
three large sunspot groups on the earthward side that are easily
visible in telescopes and if you don't have a telescope you can go to
the site: http://soho.nascom.nasa.gov/date/realtime-images.html and
view the latest real time images of these spots and any developing
CME's and flares from the Sun's surface.
KC Lobrecht
recently went to the Wichita Mountains with a group Vince Moore's
scouts. This is one of the reasons why KC was awarded the Amateur
Astronomer of the Year because of her time spent helping to develop
young people's interest in Astronomy. I just wanted to share with you
some of her report from the outing: "Hi everyone, just got
in_____We had two excellent observing nights……Really good. The
Venture Scouts were great, mature kids. The artic front blew in still
remaining clear…… thought the wind would blow the truck over,
worse than Okie-Tex. Wind chill in OKC was 15 degrees. My thermometer
was about 36 when we bugged out……The District Scout Leaders were
really a fine bunch….and appreciated our effort……My leader Vince
Moore's son Russell was fun to observe with as well….(I'm assistant
leader…..that/s hysterical! Let me give you some perspective…..as
Vince said, it's you and me kid). They got their 125 ETX out, while I
was on the fence checking what the sky was going to do and or if I
was/wasn/t going to unload again…..One of the Heads was particularly
interested. You never stand up someone that's interested in astronomy……
Good trip…..Loved the buffalos and deer fifteen feet away…..near
the truck, and in the center of our patch of observing opening. They
said it's Elk season, so they were all in hiding…..The prairie dogs
were really fun too…..fat little fat peoples dogs….loved the
topography almost as much as NM Volcano Capulin area….Rocks are good….lots
of people and creature shapes in them…..Remembered the cartoon
movie, "Me and My Arrow"…..I think Nielson made that song
famous before the movie…..Remember the dog's pointed head? They had
rock people in that movie like the Wichita Mtns. The activity was to
do rappelling, hiking and astronomy……Viewing Encke wasn't very
interesting….I hate those types: of fog on the lens and a bright
center point…..There have to be hundreds in the Herschel's, that
look like you have condensation there too. Now I loved T7 Linear and
found it with the coordinates ………Small cone shaped and it was
eclipsing a very faint 14th magnitude star and thought for a moment
the comets nucleus was active. Can't tell you how great it is to be
around young adults in that caliber of activities…" As KC said
there is nothing more rewarding than helping young students learn and
see the world of astronomy up close. Keep up the good work KC and all
the other members who spend time with others showing the public the
world of astronomy.
Before I
close, I would like to dedicate this month's article to Rod
Gallagher's wife Vicki who recently passed on to the stars. I'm sure
all the members would like to express our deepest sympathy to Rod and
his family and will always remember the good times when Vicki would
come with Rod to the observatory and the many camping trips to observe
that many of you experienced with them. Our hearts and thoughts go
with the Gallagher family. |
UPDATE: Sky
and Telescope has released an outstanding soft back magazine type work
called Beautiful Universe. It has beautiful pictures of astronomical
objects and has several pages of pictures of the recent Mars
opposition. It is now available at all bookstores and I saw copies of
it in Wal-Mart. It's a great Christmas gift for the astronomer and at
$9.95 a bargain.
Space.com has
just put out the top ten pictures for SOHO of the Sun. They are
awesome and can be viewed at www.space.com.
Many
astronomy clubs have their own best objects list. I would like to
develop the Tulsa Astronomy Club Deep Sky Favorites List with your
help. I am sure that everyone has favorite deep sky objects that they
have come across, so if you would please e-mail me a list of your
favorite objects. I will put them all in a list that can be developed
into an observing list that can be placed on the website with
information on each object and photo. We can even offer a nice
observing certificate for all who locate our favorites. You can e-mail
me your favorites at < David Stine e-mail >
I also have
just finished the new observing challenge for Winter/Spring. You must
complete the list by April 1 to receive a certificate. Brad Young, KC
Lobrecht and Rod Gallagher were the only ones to complete the Summer
challenge so lets get our winter gear out and observe. Here is the
list. Later I will have descriptions and more information with a log
for reporting your observations.
1. 6 Iota
Triangulum - Double star
2. Almach
(Gamma Andromeda) - Double Star
3. NGC
1365-The Great Barred Spiral Galaxy
4. Van den
Bergh 23-Reflection Nebula of Alcyone, brightest star in Pleiades
5. Tempels
Nebula NGC1435 - Reflection nebula in Merope of Pleiades
6. M1- Crab
nebula
7. M37 (NGC
2099) - Open star cluster
8. NGC 1499 -
California Nebula in Perseus
9. Trapezium
(41 Theta Orionis) Must see at least the 4 main stars
10. Fish
Mouth - Dark patch lying between M42 and M43
11. Triple
Nebula (NGC 1973, 1975, 1977) 3 Separate emission reflection nebula in
Orion.
12. 8 Epsilon
Monocerotis - Triple Star system
13. Rosette
Nebula NGC2237 and Star Cluster NGC2244
14. NGC 2264
- Christmas Tree Star Cluster
15. NGC
2362(30 Tau Canis Majoris) Open star cluster
16. NGC 2440
- Planetary Nebula in Canis Majoris
17. NGC 2438
- Planetary Nebula in M46
18. NGC 2360
- The Spilt Table Salt star cluster in Canis Major
19. WASAT (55
Delta Geminorum) White star with red dwarf companion
20. NGC 2392
(Eskimo Nebula) in Gemini
21. M67 (NGC
2682) One of the oldest open star clusters
22. R Leonis
- Red Giant in Leo
23. Leonid
Galaxy Group-M65, M66, and NGC 3628
24. M81-82 -
Finest pair of galaxies in Ursa Majoris
25. M60, M59,
NGC4647 - Virgo Galaxy group
26. The
Siamese Twins (NGC 4567 and 4568) Attached galaxies in Virgo
27.
3C273-Brightest Know Quasar
28. M104 (NGC
4549 - Sombrero Galaxy in Virgo
29. NGC 4361
- Planetary Nebula in Corvus
30. NGC
4038-39 - Ring Tail Galaxy - Interacting galaxies
31. Must
observe one comet or asteroid
32. Must
observe one night of meteors (at least 3 hrs.) and log each
33. Must
observe 3 planets
34. Must
observe one iridium flare and log it
35. Must
observe ISS pass or other satellite and log it.
There is a
book called "A Guide to Backyard Astronomy" which has
charts and facts about each of the above that is available at Borders
for $4.95. It is an excellent book especially for the money that you
will go back to again and again when observing. Later I will have the
list with descriptions, location coordinates. All of the objects are
within most telescopes and some are binocular objects. Lets see who
can be the first to complete the list.
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