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Old 11-10-2009, 12:46 AM
mac (Matt)
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Outer planets observations...

I was about to head to bed at midnight tonight, when I decided to wander out onto my apartment balcony to see what was happening with the weather. There was a break in the clouds and Jupiter was staring at me. So I grabbed my 10" Dob and set it up for a 'late night' peek.

The seeing was pretty bad, even after the scope had cooled down, although there were moments of wonderful clarity, lasting only a second or less. Darkish spots could be seen in one of the prominent bands on Jupiter's surface.

After that I decided to look for Neptune, but first I had a look at NGC7009 (the Saturn Nebula). I'd never seen it before, and it was a 'wow' moment for me. It was very bright and fuzzy, and the Saturn shape could be easily seen with averted vision. Anyway, back to Neptune. It's pretty much right next to Jupiter at the moment so it was fairly simple to find (thanks to Stellarium). At 139x the disc could be seen, even though it was tiny. A slight improvement was had at 166x.

Cloud cover took over that part of the sky, so I swung my scope south and decided to look at 47 Tuc for the first time.

WHOA!

Now that's what I call a glob! At magnifications of 83x and upwards, individual stars were easily resolved into the core. Nice.

Then for the finale, I decided to take a look at Uranus. With the help of my little laptop running Stellarium, I was able to star jump my way over to it, where it was clearly resolved as a disc, even at a low magnification. At 166x it was nice and round! I'm not sure if I was imagining it but there may have been a moon next to it - but only occasionally visible in averted vision.

Anyway, it was a good night considering the conditions...
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Old 14-10-2009, 03:51 PM
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xnomad
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I had my first look at Uranus last night too. In my skies at this time of year there are very few guide stars and the sky glow in the area where Uranus is located is terrible I can't believe I found it first go.

I just roughly polar aligned my rig, pointed it at Achernar dialed in the RA setting circle for Achernar , checked the Dec setting circle was correct for Achernar. Then swung the scope according to the setting circles for Uranus. Looked in my finder scope, compared it with my laptop running Stellarium, and I had it in my FOV!

I wasn't expecting success. Usually I'd have printed out the maps and star hopped my way there which would have been hard with the sky glow, but I thought I'd have a quick and easy crack at it.

In my 5" Mak it's very small and grey but clearly a disk.

Last edited by xnomad; 14-10-2009 at 06:29 PM.
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Old 14-10-2009, 07:43 PM
mac (Matt)
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Great work, xnomad! I think I'll be looking for it again soon, but preferably when I get out of the city centre. I'm curious to know if it was a moon I saw next to it or just a star in the background.
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Old 14-10-2009, 08:09 PM
Dennis
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Quote:
Originally Posted by mac View Post
Great work, xnomad! I think I'll be looking for it again soon, but preferably when I get out of the city centre. I'm curious to know if it was a moon I saw next to it or just a star in the background.
Here is some info on Uranus as viewed from Brisbane on 10th October 2009. The position of the moons will likely be different for NZ depending on your time of observation too.

The inset panel has the magnitudes and separation of the 4 brighter moons.

Cheers

Dennis
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Old 14-10-2009, 09:25 PM
mac (Matt)
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Thanks for the info Dennis. Looking at the magnitude details of the moons, it seems unlikely that I would've seen them from my city location. The light pollution restricts me to < magnitude 9 objects with my 10" dob.
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