M47 in Binos under Spore Skies?

siahheng · Post by **siahheng** » Fri Feb 03, 2006 9:53 am

Hi, being able to see M45 or any other stars for that matter depends on the background. By that, I mean the 'blackness' of the sky, too much light pollution and even mag 4 stars cannot be seen. Best time to observe for me is when the stars are near zenith where is sky is 'darkest'.

Wish all clear and 'dark' skies

siahheng

jermng · Post by **jermng** » Fri Feb 03, 2006 9:56 am

Hey Siah Heng!

I know a place that's pretty dark, away for street lights and has a very good and safe atmosphere for obbing. Found it on Wednesday night ... *wink* *hint hint* ... I think we should be able to see M45 there ...

HAHA ... =)

Post by **zong** » Fri Feb 03, 2006 10:37 am

I'm not sure about M47, there's nothing around puppis area not even a star when i glance that area of the sky, and I can only find it by a scope. Perhaps ns killed my night vision for awhile

But for M45, everytime i look back to that area i'd see a small cloud of stars, but never a few distinct stars. I'd have to use my finderscope to point at the middle of that cloud to see the full M45 in the finderscope. Again, is this another sign of weak night vision?

Canopus Lim · Post by **Canopus Lim** » Fri Feb 03, 2006 11:15 am

I think u probably looked from a very light polluted place. Stay in the east and you probably can catch it..

Grievous · Post by **Grievous** » Sat Feb 04, 2006 12:41 pm

Jeremy ah~

When u gonna ask me out for Obs? we go bino together lar?

Charlie

jermng · Post by **jermng** » Sat Feb 04, 2006 1:12 pm

Hey Charlie,
What you doing at home? thought you supposed to be at pasir ris??

You are the one always wanna go chiong, never ob .. haha ...

We still haven't do our rooftop ob yet ... hee hee ...

We can try doing it next weekend .... ;)

rlow · Post by **rlow** » Mon Feb 06, 2006 10:59 pm

Hee hee ... went to East Coast Park just now for a pretty long ob with Binos .. still can't see M45 naked eye ....

Hey jeremy & zong, maybe you need to check with your optician! OR maybe you may suffer from night myopia, which I do. After a while at Mersing last monday 30 Jan 06, I had to switch my glasses from 125 deg to 225 deg in order to see the stars sharp in Pleiades. It is a condition I had for some time already, but I didn't do anything about it til I read about night myopia in an article in Sky & Telescope magazine last year. Apparently this condition is still not very well-documented and the cause of it is still unclear. The report said that those who have this condition may usually also have larger eye pupil diameter! Hmm....

By the way, I do have other minor eye conditions: short-sightedness, old-sightedness, astigmatism, floaters, but these does not impede me from enjoying the night-sky views or observing details thru the scope.

ariefm71 · Post by **ariefm71** » Mon Feb 06, 2006 11:29 pm

It is a condition I had for some time already, but I didn't do anything about it til I read about night myopia in an article in Sky & Telescope magazine last year. Apparently this condition is still not very well-documented and the cause of it is still unclear. The report said that those who have this condition may usually also have larger eye pupil diameter! Hmm....

You have 8mm entrance pupil diameter??? no wonder you can see the horsehead nebula using direct vision while the rest of us can only use averted vision on the f/5 scope :-)

jermng · Post by **jermng** » Tue Feb 07, 2006 1:24 am

Hey Richard, check liao - every year I go once.. nothing wrong ... the only condition I have is Pleiadesobia ....

No lah .. I think everytime I try M45, it's either too low in the East or too low in the West .... didn't have a chance to see it in/near the zenith before ...

Canopus Lim · Post by **Canopus Lim** » Tue Feb 07, 2006 8:46 am

Rlow, we will try the eye pupil test next trip and see if yours is 8mm! But first we need to have a F/5 scope and 40mm EP to get the bigger exit pupil.