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
rolandlinda3
Carpal Tunnel
Reged: 01/24/06
Posts: 2233
Loc: Crozet VA 22932
|
|
Star charts show NGC 4236 as very large, which it is, but also warn that it is faint. I had already spent a night with a C8 hunting for this galaxy. Last night I tried with a 12.5 Dob and found it starhopping through the region. It is, as claimed, big but also barely seeable across the eyepiece. With averted vision I could barely detect it across the field.
Then the lightning from a retreating cell to the NE began echoeing off the clouds. Then the wind changed from nothing to 15-25 miles per hour. One minute there would be light reflections off bands of high bands of clouds, then it would clear for a few minutes, then the wind would pound the scope, then it was calm...it never stayed the same.
I hurriedly put in the astro video camera, set it on a pretty high gain and found the target, then modified the integration time to 28 seconds. Under wind conditions, this means I live with the Dobsonian "jostle" that blurs the image, but at least I get the target.
Then a nice long band of cirrus, whose long line was traveling directly over the target, stopped any reasonable image. After 15 minutes, clearing, then 10 minutes of sketching, then the next band. Then the wind kicked up enough that I was afraid the Dob would topple off the platform. A little later I got one more brief look period and called it quits. Linda came and looked at the target at the end but it was not very impressive by that time.
There is a portion of a bible book called 1 Peter that warns of a common condition for a believer: a wide variety of trials but a common faith that can sustain us through them. This evening's observation period reminded me of that lesson. It was a minor many-faceted trial, but a good reminder of a larger more serious truth. (1Pet 1:6-7)
--------------------
Roland
Sketches in members galleries: rolandlinda3
Inspirational stories/sketches at:
www.christworksministries.org
|
Kris.
Pooh-Bah
Reged: 09/16/04
Posts: 1276
Loc: Belgium
|
|
Quote:
Then a nice long band of cirrus, whose long line was traveling directly over the target, stopped any reasonable image. After 15 minutes, clearing, then 10 minutes of sketching, then the next band.
isn't it curious how often that happens? 
--------------------
Kris
To be old & wise, you first gotta be young & stupid 
8" dob
AstroTech 66ED/APO
TAL 120 newt.
my CN sketch & picture gallery
|
frank5817
Post Laureate
Reged: 06/13/06
Posts: 4087
Loc: Illinois
|
|
Roland,
This is a very fine sketch of this northern galaxy.   This galaxy was on a list I made of galaxies to observe from a very dark sky site 2 years ago but I never got to it before twilight ended the night. Eventually I'll meet this member of the M81 group.
Frank 
--------------------
my gallery
|
Shannon s
super member
Reged: 06/21/09
Posts: 138
Loc: Bartow FL.
|
|
That sounds like my observing sessions. Still good sketch. 
--------------------
4.5" & 12" Reflectors
5" Maksutov
Astroview mount
Orion SSDSI
7x50 Binos
A box of Eps
|
Tommy5
Carpal Tunnel
Reged: 03/28/04
Posts: 1821
Loc: Chicagoland
|
|
great sketch in difficult conditions
|
CarlosEH
Post Laureate
Reged: 01/19/05
Posts: 4140
Loc: Pembroke Pines, Broward County...
|
|
Roland,
A very interesting barred spiral galaxy in Draco. This galaxy lies approximately 11.7 million light-years from us. It contains at least three radio sources of which one may be a quasar. Thank you for sharing it with us all.
Links;
http://www.hawastsoc.org/deepsky/maps/dra/dra4.gif
http://www.starimager.com/image%20gallery%20pages/Galaxies/NGC%204236.htm
http://www.astrosurf.com/skylink/deepsky/ngc4000/NGC4236.jpg
http://www.lostvalleyobservatory.com/sitebuildercontent/sitebuilderpictures/ngc4490.haandlrgbfinal.kbq.jpg
Carlos
--------------------
|
|
3 registered and 13 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: 218
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 