Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User
rodelaet
Post Laureate
Reged: 04/28/06
Posts: 3063
Loc: 50°56' N - 4°58' E (Belgium)
|
|
Some dark nebulae are very rewarding objects for binocular observers, if the sky is dark enough.
Two such dark nebulae, Barnard 142 & 143, can be found less then a degree west of Gamma Aquilae. The easiest feature to go after is an E-W dark oval, the southern part of Barnard 143. With patience, the oval can grow to a full ‘C’ to the north. Barnard 142 is a separated patch south of the ‘C’. I find Barnard 142 easier to detect than the northern bend of B 143. While both objects were visible with my 8x56 bino’s, the dark nebulae appeared more conspicuous in my 15x70’s.
The bright star in the eastern part of the field is Gamma Aquilae.
Site : Butgenbach, Belgium ( 51° N )
Date : September 8, 2008
Time : around 23.00UT
Binoculars : TS Marine 15x70
FOV: 4.4°
Filter : none
Mount : Trico Machine Sky Window
Seeing : 4/5
Transp. : 4/5
Sky brightness : 20.95 magnitudes per square arc second near zenith (SQM reading).
Nelm : 6.3
Sketch Orientation : N up, W right.
Digital sketch made with Corel Paint Shop Pro X2, based on a raw pencil sketch.
(Note: if the sketch does look too dark on your monitor, try to darken the room.)
--------------------
Rony
My Astronomical Sketches
My Binocular Sketches
Callibrate your Monitor with this little strip.
Edited by rodelaet (09/13/08 07:53 PM)
|
GlenM
Vendor
Reged: 05/20/07
Posts: 1739
Loc: Lancashire UK
|
|
Rony,
Yet another winner from you.
EXCELLENT!
--------------------
Glen
www.lyraoptic.co.uk
|
frank5817
Post Laureate
Reged: 06/13/06
Posts: 4089
Loc: Illinois
|
|
Rony,
Beautiful capture of this wonderful pair of dark nebulae. To get the full glory of your sketch it is necessary to darken the room and wait a few minutes to get the best view as you have frequently pointed out with these binocular sketches. I am very impressed by how much the sketch brings back the views I have had of this incomplete capital E. Great work.   
Frank 
--------------------
my gallery
|
 WadeVC
Carpal Tunnel
Reged: 12/02/05
Posts: 2831
Loc: Lodi, California,
|
|
Rony,
Very nice rendering of this Dark Nebula indeed! Very subtle and nuanced.
--------------------
Orion XTi10 f/4.7
Orion XTi8 f/5.9
Meade NGC 70mm f/10
Orion UltraView 10x50 Wide-Angle Binoculars
My Sketch Gallery
My Astronomy Blog
A wise man can see more from the bottom of a well than a fool can from a mountain top.
|
rolandlinda3
Carpal Tunnel
Reged: 01/24/06
Posts: 2233
Loc: Crozet VA 22932
|
|
Very good catch. It's so much fun with a binocular looking for the dark side of things...the absence of stars. I don't think there is a better way to do it outside of a CS lens on astrovideo equipment. Good job. Roland
--------------------
Roland
Sketches in members galleries: rolandlinda3
Inspirational stories/sketches at:
www.christworksministries.org
|
rodelaet
Post Laureate
Reged: 04/28/06
Posts: 3063
Loc: 50°56' N - 4°58' E (Belgium)
|
|
Glen, Frank, Wade and Roland,
Your kind words are much appreciated.
Frank, I'm glad that my sketch revived a memory of a previous observation of yours.
--------------------
Rony
My Astronomical Sketches
My Binocular Sketches
Callibrate your Monitor with this little strip.
|
GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1283
Loc: Ottawa, Ontario, Canada
|
|
Rony,
A beautiful rendering of one of my all-time favorite objects! When I was out testing my recently re-worked 11x50's last weekend, I gazed at this dark splotch long and well. Based on past experience, I'd say my sky brightness would have been around 21.2-21.3 mag/sq. arcmin (I'd forgotten to bring my SQM along).
The lower stem of the "E", B142, showed a more subtle extension to the west-southwest which widened toward its westernmost end. From the west end of the darker portion of B142, this subtler extension ran a full degree, the end of which was as far from the middle of B142 as B142 is from gamma Aql. In other words, if visible in your sketch, it would extend towards the ~4 O'clock direction, almost to the field edge.
This less opaque, lower contrast extension would be a worthy target to try for before it sinks too low as Autumn approaches.
--------------------
Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
My Gallery
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
|
CarlosEH
Post Laureate
Reged: 01/19/05
Posts: 4142
Loc: Pembroke Pines, Broward County...
|
|
Rony,
An outstanding observation/rendering of this interesting pair of dark nebulae in Aquila. Dark nebula are fun to hunt down. You have captured these objects perfectly. Thank you for sharing them with us all.
Links;
http://www.hawastsoc.org/deepsky/maps/aql/aql3.gif
http://www.allthesky.com/nebulae/barnard143.html
http://www.emotiondetector.com/barnard_142___143_dark_nebula.htm
Carlos
--------------------
|
rodelaet
Post Laureate
Reged: 04/28/06
Posts: 3063
Loc: 50°56' N - 4°58' E (Belgium)
|
|
Glenn and Carlos,
Thank you!
Glenn,
That must have been a wonderful view. I hope to have another chance next new moon. A trip to 'very' dark skies in the south of France is planned.
--------------------
Rony
My Astronomical Sketches
My Binocular Sketches
Callibrate your Monitor with this little strip.
|
|
4 registered and 1 anonymous users are browsing this forum.
Moderator: Charlie Hein, cildarith
Print Thread
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Thread views: 380
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 