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Old 04-09-2011, 02:02 PM
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Observation Report 31/08/11

Observing Report,Planetary Nebula Ngc 6445+Globular Cluster NGC6440
31/08/11

16" F4.5 Newtonion


30mm eyepiece,mag x 60
Bright seems oblong shaped,12.5 mag star N/W 8 mag star S/E
UHC filter Much brighter,and gives some hint of a bipolar nature.
O111 darkens the nebula but the bipolar nature of this object much
more pronunced.

NGC 6440 in same field, Fov 60' small,round, brighter towards the middle,
some of outlying stars resolved.

Nagler 17mm type 4 108xmag
Bipolar nature of the PN plainly seen,O111 splits the two ends cleanly
but the UHC makes the object brighter.
The 8 mag star South East detracts the view and it is best to try and put
it out of the field.
Without a filter this is still a nice object.

NGC 6440 much larger and a greater number of stars ar resolved in the outer
regions but no stars resolved in towards the center.

6mm Radian 304xmag
Quite large with a lot more detail.
UHC gives the best result with the 13.3xmag star at at the South West corner
of the nebula plainly seen
O111 More nebulosity is seen,the nebula is narrower at the northern end but thicker
and broader at the south.
Is very good even without any filters under high mag.
A wonderfull Planetary to observe, takes magnification well

NGC 6440

More stars resolve but none to the core.
It is good when you can get two objects of a different nature in the same field.
Cheers
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Old 04-09-2011, 07:33 PM
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Zubenel (Wes)
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Thanks for the report Ron. I shall live vicariously through your eye piece.
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Old 04-09-2011, 09:18 PM
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Thanks for the report Ron, a very interesting pair of objects.
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Old 24-10-2011, 05:51 PM
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Wonderful report there Ron, thank you so much for sharing, and I apologise that it took so long to respond to it.

I went looking around for some pretty pics of those two objects, and I came across this beautiful pic..

Here is a pic from our deep sky forum of the two objects in the same fov (taken by Steve35)

And I also came across some interesting reading here from the Cornell University Library, regarding NGC 6440. NGC 6441 mentioned in the article below is one of my favourite globs.

Quote:
Eight New Millisecond Pulsars in NGC 6440 and NGC 6441

Paulo C. C. Freire, Scott M. Ransom, Steve Begin, Ingrid H. Stairs, Jason W. T. Hessels, Lucille H. Frey, Fernando Camilo
(Submitted on 6 Nov 2007 (v1), last revised 9 Nov 2007 (this version, v2))
Motivated by the recent discovery of 30 new millisecond pulsars in Terzan 5, made using the Green Bank Telescope's S-band receiver and the Pulsar Spigot spectrometer, we have set out to use the same observing system in a systematic search for pulsars in other globular clusters. Here we report on the discovery of five new pulsars in NGC 6440 and three in NGC 6441; each cluster previously had one known pulsar. Using the most recent distance estimates to these clusters, we conclude that there are as many potentially observable pulsars in NGC 6440 and NGC 6441 as in Terzan 5. We present timing solutions for all of the pulsars in these globular clusters. Four of the new discoveries are in binary systems; one of them, PSR J1748-2021B (NGC 6440B), has a wide (P_b = 20.5 d) and eccentric (e = 0.57) orbit. This allowed a measurement of its rate of advance of periastron: 0.00391(18) degrees per year. If due to the effects of general relativity, the total mass of this binary system is 2.92 +/- 0.20 solar masses (1 sigma), implying a median pulsar mass of 2.74 +/- 0.21 solar masses. There is a 1 % probability that the inclination is low enough that pulsar mass is below 2 solar masses, and 0.10 % probability that it is between 1.20 and 1.44 solar masses. If confirmed, this anomalously large mass would strongly constrain the equation of state for dense matter. The other highly eccentric binary, PSR J1750-37A, has e = 0.71, and periastron advance of 0.0055(3) degrees per year, implying a total system mass of 1.97 +/-0.15 solar masses and, along with the mass function, maximum and median pulsar masses of 1.65 and 1.26 solar masses respectively.

Last edited by Suzy; 24-10-2011 at 06:20 PM.
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Old 24-10-2011, 06:10 PM
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I just checked the links on my above post and NONE of them are working for me. Does anyone else see them? Seems strange that I can't see any of them.

Edit: I've just changed the links and put in another one and removed the others, but still doesn't work. My links have gone on strike.

Last edited by Suzy; 24-10-2011 at 06:23 PM.
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Old 24-10-2011, 06:17 PM
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Quote:
Originally Posted by Suzy View Post
I just checked the links on my above post and NONE of them are working for me. Does anyone else see them? Seems strange that I can't see any of them.
No Suzy, I cannot see them either
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Old 24-10-2011, 06:24 PM
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Hey Ron, just to see if it's me or this site,
can you put a link of a pic to one of those objects to see if your link works?
Thanks.
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Old 24-10-2011, 06:31 PM
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NGC 6440 here.

it works
cheers

Last edited by astroron; 24-10-2011 at 06:44 PM.
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Old 24-10-2011, 06:41 PM
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Ok, it's me...
I tried typing in your link but it didn't work for me again, tho I could view yours when you posted it.

Here is the link for that pic of Steve's on the forum, if you want to see it, you will need to copy and paste it. It's a goody!

http://www.iceinspace.com.au/forum/s...ad.php?t=77758
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Old 24-10-2011, 06:45 PM
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I don't get it....
I didn't click on the link icon, I just copied and pasted that link into the post and when I hit "submit" it came up as a link. Mass confusion.
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Old 24-10-2011, 06:46 PM
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Quote:
Originally Posted by Suzy View Post
Ok, it's me...
I tried typing in your link but it didn't work for me again, tho I could view yours when you posted it.

Here is the link for that pic of Steve's on the forum, if you want to see it, you will need to copy and paste it. It's a goody!

http://www.iceinspace.com.au/forum/s...ad.php?t=77758
I just tried to add a link for NGC 6445 and it wouldn't let me either
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Old 24-10-2011, 06:47 PM
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If nothing else, I'm making your obs thread look very busy with lots of posts haha.
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Old 24-10-2011, 06:57 PM
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Steves pic is a great reprisentation of of the view but I don't have colour vision Here
Cheers
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