Go Back   IceInSpace > General Astronomy > General Chat
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #21  
Old 05-07-2010, 06:00 PM
bloodhound31
Registered User

bloodhound31 is offline
 
Join Date: Aug 2006
Posts: 4,628
Do a full alignment on your telescope. mark and dig three holes in your grass where the legs are, about a foot deep by a shovel width. Fill them with rapid-set concrete up to three inches below the surface. make sure they are all level.

Wait a day for them to set. Re align your gear on the dry concrete, then pour in one more inch of wet concrete around your tripod feet. Let the concrete set again. Pull your tripod out.

From then on, you will have three exact and unchanging locations for your tripod feet. The mower will go straight over the top of them no problems and the grass will all but hide them.

Baz.
Reply With Quote
  #22  
Old 05-07-2010, 06:25 PM
AstralTraveller's Avatar
AstralTraveller (David)
Registered User

AstralTraveller is offline
 
Join Date: Mar 2008
Location: Wollongong
Posts: 3,819
Quote:
Originally Posted by bloodhound31 View Post
Do a full alignment on your telescope. mark and dig three holes in your grass where the legs are, about a foot deep by a shovel width. Fill them with rapid-set concrete up to three inches below the surface. make sure they are all level.

Wait a day for them to set. Re align your gear on the dry concrete, then pour in one more inch of wet concrete around your tripod feet. Let the concrete set again. Pull your tripod out.

From then on, you will have three exact and unchanging locations for your tripod feet. The mower will go straight over the top of them no problems and the grass will all but hide them.

Baz.
This is a common idea and a good one. In Canberra it would work well. Unfortunately there are some locations - such as my present backyard - where it won't work as well. The problem is a wet climate and soils with a significant amount of swelling-shrinking clays. Any small piece of concrete will move about as the soil wets and dries. During major droughts even large structures around here can be affected. If you are in such a place checking the alignment regularly is a good idea.
Reply With Quote
  #23  
Old 05-07-2010, 06:33 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
+1 for the standard Telegizmo's. +2 for the 365 version.

I've left my scope with the standard cover out over Christmas and Easter where it rained 3-4 days non-stop and the gear underneath was dry.

The standard cover isn't that expensive and does a wonderful job. If you've got your own home and a permanent backyard to set up in, then the 365 version is an excellent investment.

H
Reply With Quote
  #24  
Old 05-07-2010, 06:34 PM
strongmanmike's Avatar
strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,683
Here is my Observatory temporarily setup at my dark site outside Newcastle. The pedistal, NJP head with guide scope attached are under the covers, holds up very well for shorter stints.

Cloth + heavy garbage bag + heavy vinyl cover = easy! If I had it in my backyard this would be fine on a permanent basis IMO.

Mike
Attached Thumbnails
Click for full-size image (My Observatory.jpg)
183.8 KB20 views
Reply With Quote
  #25  
Old 05-07-2010, 07:54 PM
SkyViking's Avatar
SkyViking (Rolf)
Registered User

SkyViking is offline
 
Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
I just wanted to say that compared to the amounts many amateurs (including myself) spend on telescopes, eyepieces and imaging gear a basic roll-off obs is actually very cheap and simple to build.
Here is a link to a page I did to show the construction of my first obs: http://titirangiobservatory.com/obse...struction.html

This is a very basic project, I purchased a kitset garden shed and converted the standard roof into a roll-off version. It took 9 days to complete (= 4.5 weekends), everything included from beginning to end - note the dates under the photos. Before I started I actually thought it was going to be much more difficult than it turned out to be, and I had really great fun along the way.
I have since moved house, and that meant I had to build yet another obs...! This time I made it a bit more flash which I might upload some pics of some day. But that first obs served me very well and I just wanted to let you guys know for a bit of inspiration.

So, provided you have a backyard and of course provided your other half etc. agrees then an observatory is definitely not out of reach if you have a few basic handyman skills.

I hope you guys all get an obs some day soon - with the great imaging talents displayed here on the forums you definitely all deserve the best housing for your gear
Reply With Quote
  #26  
Old 05-07-2010, 10:36 PM
seeker372011's Avatar
seeker372011 (Narayan)
6EQUJ5

seeker372011 is offline
 
Join Date: Oct 2004
Location: Sydney
Posts: 3,663
Quote:
Originally Posted by SkyViking View Post

So, provided you have a backyard and of course provided your other half etc. agrees
and therein lies the first hurdle...

first work on getting them to agree to a pier before I start talking about an obs...
Reply With Quote
  #27  
Old 05-07-2010, 10:51 PM
Moonman's Avatar
Moonman (Michael)
Caveman Astronomy

Moonman is offline
 
Join Date: Mar 2005
Location: Launceston
Posts: 332
"Startarg" from Andy's shotglass is a good little program to aid drift allignment. I dare say after a few more attempts you'll get that 45 minutes down to half and hour.

17 trips is a lot. I have a similar dilema to you with setting up. I've found that preplanning and organisation is the key. There's always stuff I can do earlier on while it is still daylight to save time later on.

I plan to eventually setup with a permanent pier. I think ultimately this the way to go. A surrounding observatory a mere cosmetic detail!(Joke)

Keep up the good work!
Reply With Quote
  #28  
Old 06-07-2010, 12:02 AM
Jen's Avatar
Jen
Moving to Pandora

Jen is offline
 
Join Date: Jan 2008
Location: Swan Hill
Posts: 7,102
Quote:
Originally Posted by Ric View Post
If I had a dollar for everytime that has happened to me over the years, I'd probably have an Obs by now.

Cheers
lol Ric

Quote:
Originally Posted by strongmanmike View Post

Imagine the anguish when the cloud comes over then, or the lappie fails, or I forget a critical component...like the whole lappie

Mike
for some reason Mike i have an image in my head of you having a temper tantrum out in the middle of the field looking for your laptop

Reply With Quote
  #29  
Old 06-07-2010, 08:56 AM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,993
Quote:
Originally Posted by erick View Post
I've been away all weekend, but I had calculated that the terminator was crossing Plato this morning and I still have not properly seen the small craters within its walls. So I said I must give it a go.

Went to bed with cloudy skies. Got up at 3:30 and - only scattered cloud and nice bright Moon fairly well positioned. Had the Turbo Starcatcher set up in the driveway and collimated in 15 min. All rugged up against the cold - started looking.

Yes, terminator was nicely placed on Plato BUT the seeing was shocking! Couldn't get stars to points; the Moon was a jelly and Jupiter a fuzzball with only hints of the major band. Persisted for half an hour, saw some interesting (low resolution only) features on the Moon, eg. the sunlit tip of the central peak in Eratostheses, then it clouded over, so I packed up and was back in bed by 5.

Edit - had a thought. I wonder if my mirror was a bit too warm. I noted it was at 11 deg when I took it out from its storage location. When I put it away about an hour later, outside temp was 3 deg and the mirror was down to 7 deg?
That's a massive difference...did you have your fans running before observing? I can get my mirror down to within 2C of ambient, which produces much better images than when the delta Temp is 5C or more.

Plato should be mint in your scope, I've seen 12 craterlets in mine and have resolved crater pits as small as 1-1.5km in diameter.
Reply With Quote
  #30  
Old 06-07-2010, 09:31 AM
erick's Avatar
erick (Eric)
Starcatcher

erick is offline
 
Join Date: Dec 2006
Location: Gerringong
Posts: 8,548
I just pulled it out, set up and started observing - not time for all that fan-blowing cool-down stuff that I would do if I set up in the late afternoon. Didn't think it would be an issue. I still think the fast seeing problem was dominating at that time.
Reply With Quote
  #31  
Old 06-07-2010, 09:35 AM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,993
No cooldown = poor views. I know for a fact...I've tried viewing striaght after bringing the scope out and don't even bother, I run the fans atleast for an hour which results in a noticable improvement in the view, even in substandard seeing.
Reply With Quote
  #32  
Old 06-07-2010, 04:52 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,993
So far this month, Melbourne is averaging 1, that's right, ONE hour of sun per day. That is 5 hours/day cloudier than Hobart

Melbourne is truly living up to its grundgy climate reputation (as it always does anyway).
Reply With Quote
  #33  
Old 06-07-2010, 09:37 PM
rmcconachy
Registered User

rmcconachy is offline
 
Join Date: Oct 2007
Location: Victoria
Posts: 249
I wouldn't call the last few weeks good by any means but it's not that bad Sab. It is winter after all. Like Eric, I did a little observing from my backyard in Ringwood early Monday morning and again early this evening. To avoid having a long cool down wait I only dragged out the 4" refractor.
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 12:11 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement