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Old 24-02-2012, 10:02 AM
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Excellent seeing AGAIN! Observations 24/2/12

Don't know what the hell is going on here, but once again, I've experienced awesome seeing for the second observing session in a row. That is a personal record.

So, I took the 8" dob out to cool last night. A little spider decided to inhabit the focuser, complete with a nice little spider web....... so before anything else was done, I whipped out my lighter....

The plan was to observe Mars and Saturn in the morning. Went to bed early (wasn't feeling well and was tired) and 5 seconds later the alarm rings at 1:30am.

So, out I go, after 3 hours of sleep... set up the scope (after brushing off another couple of strands of spider web) and all my stuff.

But before I commit to hauling out anything else, I decide to check the seeing. If the seeing is crap... then you know, no real point in doing planetary observation. So in goes the 8mm eyepeice in the focuser, aim at Mars... and well, nice and sharp. It's a goer. It was a cold morning, had to wear a light jacket, and it's supposed to be 35C in the afternoon?


Well, seeing again was fantastic. Did a sketch of Mars at 342x (will post later)... two patches of cloud were clearly visible at the western edge of the planet as was a nice bank of white mist along the eastern limb. The North Polar Cap appeared to have shrunk considerably since my last session, but that is due to the fact that it's late spring mars' northern hemisphere. As good as the seeing was, Mars is an excruciatingly low-contrast target and is very sensitive to even slight turbulence in the atmosphere so to sketch it took over half an hour to really get a good look at its features. Mum came out at about 5:00am, Mars by then was quite low but still quite nice at 342x.... showed her the polar cap and the clouds along the limb. She was thoroughly impressed!

Saturn was the highlight. Again, using the 3.5mm eyepiece at 342x, it was razor sharp, I had to check the label on the eyepiece to make sure it was infact the 3.5mm, rather than the 8mm which is normally what provides the sharpest views in typical seeing.

Well, the Cassini Division was easily seen all the way round infront of the planet, and subtle cloud bands were seen, greyish against the pale brown globe. The polar hood was also visible, but very subtle.

There were numerous planetaries and galaxies available for observation, which in this seeing conditions I should've taken advantage of, but when Saturn is deadset picture perfect sharp at nearly 50x per inch it's kind of hard to pull away!

Not only was the seeing a class act, but transparency was crazy aswell. The sky just seemed to sparkle. This would've been THE night to really hunt down planetary nebulae and certainly those Abell and Hickson galaxy groups! But.... the 8" doesn't quite have the horsepower of the 12".... which I don't have yet, but... the mirror is due to arrive at SDM ready for fitting today....

Also took a quick peek at Antares and Beta Musca. Antares was easily split. 600x afforded a good view of the companion, some people say it looks green , to me it is a pale blue. Beta Musca was cleanly split, nearly equal brightness, quite a sight at 600x. A very lovely double star.

cheers

Last edited by pgc hunter; 24-02-2012 at 10:31 AM.
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Old 25-02-2012, 02:46 PM
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Great stuff Sab. I think getting up at 1.30 is a great strategy - I've been starting earlier and by the time I'm exhausted and have to head in, the seeing is really starting to improve, as well as the transparency. Sounds a magnificent night.

Funny about your spider. I've had one building little webs around the secondary spider of my scope. As if he knows what it's called!
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Old 25-02-2012, 04:17 PM
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Spiders! I found a daddy long legs in my ota the other night and a few bits of cobwebs. Must be a lot of spiders this year.
Yes the seeing was pretty good at Snake valley last night also. managed Cent A naked eye thanks to Kens encouragement. Saturn was really steady with clear cloud bands and the Cassini division standing out.

Malcolm
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Old 25-02-2012, 04:39 PM
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Great report, thank Sab.

Just incredible you could make out all that detail on Mars.
When I saw it a couple of weeks agao (after 2mths of non observing due to persistent rain and cloud ) I too got to see some wonderful features- dark shading and wow that polar cap was so bright and striking. No misty wisps though, I'm not that god yet .

That's a whole lot of power to split Antares- I had no idea it needed that much.
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Old 25-02-2012, 04:46 PM
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Good to hear, Sab

Yes, last night was terrific!

I reckon we are due some clear nights. The Weather Gods have been giving us a hard time for long enough!
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Old 25-02-2012, 05:09 PM
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thanks guys! Two great sessions in a row, finally got paid my long overdue dues


Quote:
Originally Posted by Paddy View Post
Great stuff Sab. I think getting up at 1.30 is a great strategy - I've been starting earlier and by the time I'm exhausted and have to head in, the seeing is really starting to improve, as well as the transparency. Sounds a magnificent night.

Funny about your spider. I've had one building little webs around the secondary spider of my scope. As if he knows what it's called!
It's not a bad way of going about it, especially if you're after faint galaxies and what not going to sleep and getting up early means you've been dark adapting for hours and transparency is at its best. I never really considered it though when planning my sessions.


Quote:
Originally Posted by barx1963 View Post
Spiders! I found a daddy long legs in my ota the other night and a few bits of cobwebs. Must be a lot of spiders this year.
Yes the seeing was pretty good at Snake valley last night also. managed Cent A naked eye thanks to Kens encouragement. Saturn was really steady with clear cloud bands and the Cassini division standing out.

Malcolm
You and Paddy aswell! My place is shocking for spiders, no kidding every single window corner, eave, fence everything has got webs all over it. But it's not as bad atm as in late spring/early summer, lot more spiders then - perhaps out looking to "get some".... that would explain the reduction of spider activity lately... all the males have been eaten

Centaurus A naked eye? that's pretty damn impressive!


Quote:
Originally Posted by Suzy View Post
Great report, thank Sab.

Just incredible you could make out all that detail on Mars.
When I saw it a couple of weeks agao (after 2mths of non observing due to persistent rain and cloud ) I too got to see some wonderful features- dark shading and wow that polar cap was so bright and striking. No misty wisps though, I'm not that god yet .

That's a whole lot of power to split Antares- I had no idea it needed that much.
hey Suzy Nah Antares doesn't need that much magnification, but it's best to go as high as possible. I could see the companion at about 300x (didnt try any lower) but this binary is notoriously difficult due to their close seperation and the overwhelming glare of the primary so used as much power as I could to increase the apparent gap. Even in this good seeing, the glare is overpowering. IMO Antares is a harder split than Sirius. AFIAK the seperation is less than 3".

Quote:
Originally Posted by ballaratdragons
Good to hear, Sab http://www.iceinspace.com.au/forum/....s/thumbsup.gif

Yes, last night was terrific!

I reckon we are due some clear nights. The Weather Gods have been giving us a hard time for long enough!
For sure. Surprising to get two such good sessions in a row - and less than a lifetime apart to boot! Hoping to get out tonight, but looking at the satpic, there is masses of disgusting cloud tearing down from NSW at superluminal velocity, and the week ahead is just another cold late-Autumn scudfest . La Nina, I hate you more than the permanent nuclear winter you cause.


cheers
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Old 25-02-2012, 09:13 PM
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Quote:
Originally Posted by pgc hunter View Post
. . . Hoping to get out tonight, but looking at the satpic, there is masses of disgusting cloud tearing down from NSW at superluminal velocity,

cheers
Crystal clear here

There is an absolutely magnificent dispaly of the new Moon, Venus and Joop sitting in the Western Sky.
Bee - yoooo - tiful
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