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  #61  
Old 10-07-2015, 08:54 AM
Kunama
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It always was, is and will be a planet to me. Sure looks like one! I have nothing against dwarves but if it quacks like like a duck ........

CT had it right when he announced " Doctor Slipher, I have found your planet X "
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  #62  
Old 10-07-2015, 09:14 AM
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pluto (Hugh)
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...but if it quacks like like a duck
So do you call Eris a planet? It quacks like a duck too!
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  #63  
Old 10-07-2015, 09:58 AM
N1 (Mirko)
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Duck or not, I'm hoping to see an annular phase of Pluto after the pass, when the night side is recorded. If the atmosphere is thick enough to cause the central flash we saw during last week's occultation, it may be thick enough for this too (I'm thinking the two are related anyway)...
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  #64  
Old 10-07-2015, 10:54 AM
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You should get your wish. It looks like NH will pass through Pluto's shadow after closest approach: https://www.youtube.com/watch?v=f19tTPlUoqc

If you want any more details of the images, and other science, gathered during the flyby then check out the playbook:
http://pluto.jhuapl.edu/Mission/The-...LORRI-MVIC.pdf
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  #65  
Old 10-07-2015, 11:05 AM
N1 (Mirko)
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Yes NH passes through Pluto's shadow (2:33 in the vid), but the simulation suggests NH will be talking to Earth rather than recording image data during that period. So the phase angle when it does take a look will be less than ideal. Having said that, it worked with Venus in 2012 even though it had a degree and a half elongation from the Sun the day after the Transit. It was one of the coolest things I've ever seen through the eyepiece. So let's see.
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  #66  
Old 10-07-2015, 01:22 PM
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NH prepares for a radio-occultation of Pluto and Charon just after the physical pass through the orbital plane of the Pluto system. The earth broadcasts a signal and NH picks it up. Not sure where that is listed in the timeline video.

[EDIT]
The Pluto - Earth occ occurs at 12:42:55 UTC, with the REX instrument active (high-gain antenna + signal processing module).
The Charon - Earth occ occurs at 14:30:44 UTC, again with REX active.

REX has to listen to the transmitters from earth, and as can be seen in the video, it's not far from the Sun. The REX paper (address below) advises that the separation is 0.23 degrees. The Deep Space Network has been assigned to pump out a minimum of 10kW at a baseband frequency of 7.1GHz (preferably 20kW) to provide the occultation "artificial radio star light", which has to be picked out from the broadband signal from the sun. A pretty decent task for the REX module.

http://pluto.jhuapl.edu/Mission/Spacecraft/Payload.php
http://www.boulder.swri.edu/pkb/ssr/ssr-rex.pdf

Regards,
Tony Barry
WSAAG

Last edited by tonybarry; 10-07-2015 at 05:28 PM. Reason: Added timeline video times.
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  #67  
Old 10-07-2015, 11:32 PM
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AussieTrooper (Ben)
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Quote:
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It is amazing how the closer we get to Pluto, the more it looks like the early Martian drawings.
Was just thinking that. I'm sure there are canali there somewhere...
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  #68  
Old 11-07-2015, 08:55 AM
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New pics:
http://pluto.jhuapl.edu/soc/Pluto-En...x630_sci_1.jpg
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  #69  
Old 11-07-2015, 05:44 PM
RichardJ (Richard)
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Thanks Hugh.
So exciting to see the details emerging day by day.
Fingers crossed all goes well.
Richard.
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  #70  
Old 12-07-2015, 02:51 PM
icytailmark (Mark)
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check out this app. It gives live data of new horizons and what its currently doing.

http://eyes.jpl.nasa.gov/eyes-on-pluto.html
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  #71  
Old 12-07-2015, 07:13 PM
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Wow: http://pluto.jhuapl.edu/soc/Pluto-En...11<br>04:06:25
only 4 million kms out!
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  #72  
Old 13-07-2015, 08:31 AM
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"Pluto Killer" Mike Brown has been tweeting https://twitter.com/plutokiller about the features observed on the imagery so far - in particular, the equatorial ring of dark spots and the "heart". Interestingly, he points out that such features were PREDICTED in a 1996 paper "Seasonal Nitrogen Cycles on Pluto" by Hansen & Paige http://www.lesia.obspm.fr/perso/brun...aige_Ic_96.pdf

How excited do you reckon those two would be right now that the data is actually starting to come in?!

(By the way - for those unfamiliar with his work, while Mike Brown is mostly known as the guy who got Pluto demoted from full planet status, it's not because he hates Pluto - far from it, he has contributed hugely to the study of the dwarf planets and KBOs etc.)
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  #73  
Old 13-07-2015, 11:26 AM
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Quote:
Originally Posted by julianh72 View Post
"Pluto Killer" Mike Brown has been tweeting https://twitter.com/plutokiller about the features observed on the imagery so far - in particular, the equatorial ring of dark spots and the "heart". Interestingly, he points out that such features were PREDICTED in a 1996 paper "Seasonal Nitrogen Cycles on Pluto" by Hansen & Paige http://www.lesia.obspm.fr/perso/brun...aige_Ic_96.pdf

How excited do you reckon those two would be right now that the data is actually starting to come in?!

(By the way - for those unfamiliar with his work, while Mike Brown is mostly known as the guy who got Pluto demoted from full planet status, it's not because he hates Pluto - far from it, he has contributed hugely to the study of the dwarf planets and KBOs etc.)
And for those unfamiliar with James Hansen, he is one scientist that I regard as a hero of sorts. He became aware that NASA officials were reviewing and filtering public statements and press interviews in an effort to limit his ability (as well as that of other government scientists) to publicly express scientific opinions that were politically inconvenient.


In January 2006, Dr. Hansen told Andrew Revkin of the New York Times that he was warned of "dire consequences" if he continued (to make similar statements) Revkin reported that George Deutsch, a NASA public affairs officer appointed by the White House, denied a request from National Public Radio to interview Dr. Hansen, calling NPR the country's "most liberal" media outlet and arguing that his job was "to make the president look good."4 Mr. Deutsch later resigned after it was revealed that he had fabricated his own academic credentials.

Revkin, Andrew C. “A Young Bush Appointee Resigns His Post at NASA,” New York Times, February 8, 2006, accessed December 7, 2006

Arguing that his loyalty was to NASA's mission statement, which then read in part "to understand and protect our home planet," Dr. Hansen refused to be silenced. ''Communicating with the public seems to be essential,'' the Times reported him as saying, ''because public concern is probably the only thing capable of overcoming (the) special interests that have obfuscated the topic.

Revkin, New York Times January 29, 2006.

In February 2006, the phrase "to understand and protect our home planet" was deleted from NASA's mission statement without any notification to agency scientists. The replacement mission statement, which reads "to pioneer the future in space exploration, scientific discovery and aeronautics research," represented the first time that knowledge of Earth was not explicitly stated as part of NASA's mission.

Revkin, Andrew C., “NASA’s Goals Delete Mention of Home Planet,” New York Times, July 22, 2006.

Dr. Hansen pointed out that (administration) attempts to control scientific information were not limited to NASA, and that colleagues at NOAA have told him that conditions there are, in general, much worse.

Farrell, Bryan, “Political Science,” The Nation, February 13, 2006

Said Hansen, "In my thirty-some years of experience in government, I've never seen control to the degree that it's occurring now. I think that it's very harmful to the way that a democracy works. We need to inform the public if they are to make the right decisions and influence policy makers.

“A Conversation With Dr. James Hansen,” New York Times video interview


Dr Hansen retired in 2013 in order to become more politically active.
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  #74  
Old 13-07-2015, 11:40 AM
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A processed version of the one I linked to earlier: http://pluto.jhuapl.edu/Multimedia/S...luto_Alone.png
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  #75  
Old 13-07-2015, 02:11 PM
clive milne
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And Charon

http://ichef.bbci.co.uk/news/660/cps...aron_alone.png
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  #76  
Old 13-07-2015, 02:15 PM
clive milne
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Less than 24 hrs until it begins in earnest.

I have to say I find this mission far more compelling than I did Cassini.
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  #77  
Old 13-07-2015, 02:37 PM
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Quote:
Originally Posted by clive milne View Post
Less than 24 hrs until it begins in earnest.

I have to say I find this mission far more compelling than I did Cassini.
Yes, I agree. We all knew what Saturn looked like before Cassini entered orbit - with Pluto it's all unknown

For those who can't wait to see more, like me , it might be worth re-reading Emily's breakdown on when new images will be downlinked, especially the list down the bottom:
http://www.planetary.org/blogs/emily...ons-pluto.html
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  #78  
Old 13-07-2015, 02:47 PM
clive milne
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This shows the current location of NH....

http://pluto.jhuapl.edu/whereisnh/Pl...e2015_3169.svg
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  #79  
Old 13-07-2015, 03:42 PM
N1 (Mirko)
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It's a compelling mission alright, but let's be fair to Cassini/Huygens - Having a probe carry another probe to a Saturnian moon and landing it there has to be one of the greatest feats of planetary exploration.

Anyway, tomorrow we'll see stuff no one has ever seen before. Too bad there's no stopping for a second look.

I want to have a look at Pluto tonight (better weather than tomorrow night). Any idea what power to use in an 18" observing from suburbia for best results - seeing being average?
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  #80  
Old 13-07-2015, 03:48 PM
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pluto (Hugh)
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It's a compelling mission alright, but let's be fair to Cassini/Huygens - Having a probe carry another probe to a Saturnian moon and landing it there has to be one of the greatest feats of planetary exploration.
Good call, almost forgot about Huygens, definitely edge of seat excitement during that landing!
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