celestron reflector first light

ursaMinor · Post by **ursaMinor** » Mon Feb 09, 2004 5:41 pm

Thx, will keep that in mind!

rlow · Post by **rlow** » Mon Feb 09, 2004 5:53 pm

Perhaps it is alright to observe at your living room if you keep the window pane and window grille out of the way just as we have done on Sunday afternoon. And you do have a good paranomic view of the Eastern sky up to 45 degrees, so you should be able to see Jupiter (which looks like a very bright star to the naked eye) in the east after 11pm, followed by the third-quarter Moon which rises around midnight.

Post by **weixing** » Mon Feb 09, 2004 6:28 pm

Hi,
Even if you open the windows, the image quality may still be affected. This is mainly cause by the air moving in and out through the window, which is due to temperature difference between the inside and the outside air. As a result, it may cause image instability and distortion.

Have a nice day.

Post by **VinSnr** » Mon Feb 09, 2004 9:18 pm

weixing wrote:Hi,
Even if you open the windows, the image quality may still be affected. This is mainly cause by the air moving in and out through the window, which is due to temperature difference between the inside and the outside air. As a result, it may cause image instability and distortion.

Have a nice day.

Not to worry. All he have to do is to open his window say for half an hour before observing. Should be ok after that. His mirror is not very large, tube not very big and temperature differences not really a lot. Should be quite negligable if there is any drop in image quality.

kayheem · Post by **kayheem** » Mon Feb 09, 2004 10:07 pm

VinSnr wrote:
weixing wrote:Hi,
Even if you open the windows, the image quality may still be affected. This is mainly cause by the air moving in and out through the window, which is due to temperature difference between the inside and the outside air. As a result, it may cause image instability and distortion.

Have a nice day.
Not to worry. All he have to do is to open his window say for half an hour before observing. Should be ok after that. His mirror is not very large, tube not very big and temperature differences not really a lot. Should be quite negligable if there is any drop in image quality.

Hi Vin,

My personal experience mirrors weixing's opinion in that one should not view through a window. I was using my 5" SCT and did experience significant distortion. Perhaps it was because of my low level (level 2). I remember that you were staying on a higher floor. Being more windy, the temp difference may have been less for you. Anyway, if anyone wants to do their viewing through a window, don't let us stop you. It is only our personal opinion.

Kay Heem

Post by **acc** » Mon Feb 09, 2004 10:10 pm

My personal experience mirrors weixing's opinion in that one should not view through a window. I was using my 5" SCT and did experience significant distortion.

I personally do not experience any problems viewing from my balcony with either of my scopes. I guess condition varies from place to place and YMMV. Cheers!

ursaMinor · Post by **ursaMinor** » Mon Feb 09, 2004 10:48 pm

Its quite shaky~~~~~due to the strong winds, but hey, finally caught a first view of jupiter! I could see its orange bands and 4 little twinkling moons besides it. its still quite cloudy now. I'll have to wait for the clouds to get a more satisfying view. Astronomy is fun.

ursaMinor · Post by **ursaMinor** » Mon Feb 09, 2004 10:51 pm

Oh, do some of you actually go to the rooftop to view the skies? I was wondering how do some of you get access to the rooftop? Like bribing the security guards?

rlow · Post by **rlow** » Tue Feb 10, 2004 12:10 pm

It is very windy at ursaMinor's apartment in the afternoon, and the temperature difference in the evening would probably not be too great. Furthermore his apartment is a east-facing unit and it is not severely heated up by the afternoon sun. Hence the image distortion through his scope, if any, may not be significant for casual observation for a beginner at his location. In any case, any observation, even through a window opening, is better than not observing at all. Afterall, Alcock has even managed to discover a comet while in his house and viewing through his window.

Post by **weixing** » Tue Feb 10, 2004 12:32 pm

Hi,
His house is windy?? Make sure his newtonian don't become a dust bin... If you know what I mean...

Have a nice day.