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Auburn
Astronomical Society
Conecuh
National Forest
Darkest Sky Observing
Site
John
Tatarchuk
I
went down to the extremely dark Conecuh National Forest Saturday 9/8 and
Saturday 9/15. Using Google Earth, I have at last located a large
field where multiple observers can set up!
On
9/8, I had some high cirrus clouds to contend with till about 10:30.
However, once they cleared out, the sky was spectacular. M33 was
a clear naked eye object, and M31 stretched for about 2 degrees naked eye.
The Milky Way was extremely bright, and had a very powdery, peppered look
to it. The Gegenshein was visible in northeastish Aquarius.
This
was the first time I had gotten to do any serious deep sky observing since
April. I seemed a little rusty at first, but soon got into stride.
Objects like the North America Nebula, Veil Nebula, and later, Horsehead
Nebula were spectacular through the 18", but the real meat of this observing
session was the Abell galaxy clusters. I observed five different
extremely obscure Abell galaxy clusters, including one at a distance of
1.9 billion light years. Towards dawn, Venus startled me with its
brightness, casting shadows.
I went
back down to the Conecuh National Forest on 9/15. This time I met
up with Taras from the Mobile Astronomy Club, who brought along his 10"
Discovery dob and 4.5" RFT. We set up in a fairly large, dirt field
with pretty decent horizons that I had found in Google Earth images.
The sky proved very dark that night. Not only was the Gegenshein
visible, but around 1-2AM I noticed that the even fainter zodiacal band
was visible! The zodiacal band is a band of light along the ecliptic
that is caused by sunlight being scattered by interplanetary dust.
Unlike the zodiacal light, it is visible at any time during the night,
and it is also MUCH, MUCH fainter. Pointing out the zodiacal band
to Taras, he saw it too, saying "it looks sorta like the Milky Way".
Yea maybe, but 20 times fainter and only about 10 degrees wide! It
was incredible to look up and literally see the plane of the solar system
etched across the sky!
Anyway,
the night proved to be one of the darkest I have ever seen at the Conecuh
National Forest. Overhead, it appeared to be just as dark as West
Texas. Unfortunately, I left my front light baffle at home, and had
to construct one on-site out of some sticks, duck tape, and some black
cloth. After I finished this, I got some great views. I spent
the time hunting Abell planetary nebulae, more extremely obscure Abell
Galaxy Clusters (I spotted 2-3 galaxies in one that is 2.5 billion light
years away!!!), and I even tracked down the supernova remnant Cassiopeia
A. Taras and I stayed all night till dawn. I started
packing up when I noticed that the morning light had made it no longer
possible to see the Horsehead Nebula without a filter.
Conecuh National
Forest Dark Sky Site
John
Tatarchuk
I've
been searching for the perfect Alabama dark sky site for years. While
I still haven't yet discovered the perfect site, I've come very close.
Tom
McGowan and I first scouted out the dark skies of the Conecuh National
Forest back in May 2005. We set up on the side of a road, about 14
miles east of Brewton, Alabama (as the crow flies). When the summer
Milky Way reached meridian that night, we knew we had something special.
Since then I have scouted out two even darker sites closer to the heart
of the forest.
The
skies at the Conecuh National Forest are very dark- excluding the horizons
which have some light pollution hugging them, it's nearly impossible to
tell you're not in West Texas. The faint and elusive Gegenshein
is visible every night, and on a good night, the incredibly faint zodiacal
band (not to be confused with the immensely brighter zodiacal
light) is visible too. M33 is about to easy to see naked eye
as M31 from a magnitude 4.5 or 5 site. The Milky Way is incredible.
The
Conecuh National Forest is located in extreme south Alabama, east of the
town of Brewton, Alabama, and southwest of Andalusia and Opp. According
to the light pollution maps, it's located in a Bortle Scale 2 zone.
While there are wide swaths of Bortle
Scale 2 areas in southwest and south-central Alabama, the Conecuh National
Forest is the only Bortle Scale 2 area that I have found that is located
on public lands. Below is a map of light pollution in central and
south Alabama, showing the normal AAS dark sky site (at Bortle Scale 4)
and the Conecuh National Forest.
Conecuh
National Forest Clear Sky Chart
Approximate
driving times:
From
Auburn: ~3-3.5 hrs, ~205 miles
From
Montgomery: ~2.5- 2.75 hrs, ~155 miles
From
Birmingham: ~3.5-4 hrs, ~230 miles
[The
following directions were edited by the Webmaster, with the author's permission.]
There
are many ways to get to the Conecuh National Forest. The exact site
within the forest is located at:
31°
6' 40.24"N
86°42'
26.51"W
Let's
assume that you're driving down I-65 South. At exit 77, south
of Evergreen, turn left back over I-65 to the east on ALA 41 and drive
16 miles to downtown Brewton.

| At
the railroad tracks in downtown Brewton, ALA 41 merges with US 29 North
(Mildred St.).
You
might want to reset your trip odometer as you cross the RR tracks
in Brewton. The following distances and mileages are based on this
as a starting point. The turn-off point to CNF is just past "mile
marker 25" on US 29N.
Continue
0.3 miles due east past the railroad tracks, over the bridge into East
Brewton, (now Forrest Ave.). At odometer reading 1.3, bear left (east)
where US 29 North diverges from ALA 41, and heads towards Andalusia. |

| At
about 9 miles out, you'll see CR 4 on the right. This is just a landmark.
Stay on US 29N. which is actually heading north here.

At
about mile 12, US 29N is heading east.

At
about mile 20, (just past "Brooklyn Road.) you'll cross the "McGowan Bridge".
Thanks Tom!

Just
beyond mile 24 you'll pass "Mason Cemetery Road", and be heading almost
due east.

Near
mile 24.5, you'll see CR 11 (Dixie Highway) intersecting from the south.
Stay on US 29N.
Near
mile 25.0, pass "Dixie School Road." from the north (where the "US 29"
marker is on the above image). Start slowing down and put on your
right turn signal. You'll pass to residential driveways. The
third "driveway" is the road to our CNF site.
Near
mile 25.2, open fields, dwellings, and farm buildings change to forests
on both sides of the road and the highway begins a gentle uphill grade.
The turn-off is before you start going up the hill.
This
shot was made from the CNF road entrance
At
about mile 25.4 TURN RIGHT (south) on what we think is "Forestry Rd. 311B"
but it is not marked. This sandy road is well hidden in the trees.
This
is how the road looks as you enter. You'll pass a cotton field on
the right shortly after your turn.
If
you find yourself going uphill and entering Covington County, you just
missed the turn-off. There's a good turn-around at the top of the
hill -- don't ask me how I know. Come back and try again.
It's
another 3.2 circuitous miles to the observing field. Your odometer
should now be about 28.6 miles.
BE
CAREFUL: The field is set a bit off the road, and in the dark, it
could be missed.
The
observing field is a cleared, flat, very sandy field. There are a
few weeds growing in it, but very little grass. Because of the extremely
sandy soil, it's dry and free of mud. Make sure to bring a tarp to
set the scope up on! It takes a vehicle with a decently high suspension,
such as a small truck or SUV, to directly drive out into the field, as
there is a steepish drop off right where you pull off the road. No
fear though, if you have a small car with a low suspension, there is a
place where you can park. However, you will have to transport your
equipment from this parking spot about 75 yards out into the field. |

| Driving
back from the Conecuh National Forest can be tough after staying up all
night observing. I recommend a 1-2 hour nap after the observing session
is over. Dark skies aren't worth dying for. |


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