Clocking Neptune's Spin http://uanews.org/node/40494 The news was that a scientist just used 500 HST Neptune images to find out very accurately the rotation...
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Mark Trueblood
mtrueblood@...
Jul 2, 2011 7:57 pm
Does anyone know how the NOMAD-1 Naval Observatory Merged Astrometric Dataset version 1 catalog compares to the USNO B0 or other catalogs in common use? We are...
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Brian Skiff
bas@...
Jul 2, 2011 8:11 pm
... Since NOMAD is a compilation catalogue of "everything", and nearly "everything" numbers-wise is USNO-B1.0, the difference between NOMAD and B1.0 is rather...
Just a final note on this. The work in progress has been completed. Astrometry was done and photometry redone with Astrometrica. An updated photometry graph...
because they had idiots running their NEO detection programs, who didn't look out for COMETS. The other quote appears to have come from Larry Niven: ...
Be positive, it is better to have idiots running an NEO program than smart asses not running any program at all like in the rest of the world, Europe in...
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Ron Baalke
baalke@...
Jul 4, 2011 4:29 am
July 01, 2011 J.D. Harrington/Michael Braukus Headquarters, Washington 202-358-5241/1979 j.d.harrington@.../michael.braukus@... Lynnette Madison ...
It is notable what has been achieved so far, but Jupiter is a great example of statistical folly. A few years back at the planetary defense meeting in...
There's an old joke about a guy looking on the sidewalk under a streetlight for a contact lens because the light is better. Although long-period comets may...
Since when, except in Grondineland, do long period comets represent half of the impact threat ? That would be the same as saying that objects coming close to...
Amen....and here we go again. Clay _____ Dr. P. Clay Sherrod Arkansas Sky Observatories MPC H45 - Petit Jean Mountain South MPC H41 - Petit Jean Mountain MPC...
... How does that square with the statement that "the frequency with which long-period comets (of any size) closely approach the Earth is roughly one-hundredth...
Maybe it has to do with the fact that asteroids are in the plane of the ecliptic while comets come in from every direction. If an object is to have a chance of...
Well, allow me to point out that the document you referred to was a discussion of the extension of the search for possible NEO impactors down to the size of...
Hi Larry, This whole thread started off based upon someone's statement about the extinction of the dinosaurs, a major once-in-a-hundred-million-year event. I ...
Here's the real reason for the demise of the dinosaur: Thom ... -- Thom Peck Master Optician Thom Peck Optics Vail, Arizona [Non-text portions of this message...
Sorry, That didn't work. It was supposed to be the Gary Larsen cartoon. ... -- Thom Peck Master Optician Thom Peck Optics Vail, Arizona [Non-text portions of...
Hi Alain - Thanks. You're certainly welcome, and it is indeed unfortunate that Europe's detection program does not match that of the US, but I lived and worked...
... But given the way the many anti-intellectuals in congress react to anything said by "pointy headed scientists", that's still not nearly enough time to do ...
Hello all, Except those who will have already pressed the delete button if they don't care about the subject, which is of course their right. It would be nice ...
I'll add my voice to most if not all of what Alain wrote. The population statistics of detected long period comets do not justify ANY extra expenditure to...
Hello (again) I'd like to know if somebody on the list would have a version of the sextractor program, compiled for windows. I looked into doing it, have to...
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Andrea Milani
milani@...
Jul 5, 2011 1:53 pm
The passage of 2011 MD on 27 June 2011 was such a close approach that the orbit was significantly affected by the shape of the Earth; the effect was also...
Hi Andrea, I would like to ask what impact have the huge amount of observations made by code I27 to the orbital solution. I mean, do the residuals change if...
Hi Andrea, This is an interesting point! Have there been any previous natural objects (except planetary satellites) that needed J2? The effect is indeed quite...
Hi Alain - The KT ELE can be identified as cometary due to the KT Fossil. We know based on Raup and Sepowski's work that multi specie ELE's occur at chaotic 26...
....but honestly, Ed, how is "Tim" going to change any of this? How is your being appointed the head of the IAU going to change any of this? Either of those...
