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Subject: EXTERNAL:
Author: Cristina M. (ARC-SSA)[ASRC Research & Tech Solutions] <Solutions]">
Date: 06-Jan-2011 19:31:35
Re: EXTERNAL: [SBAG Population Identification & Characterization] population  section draft of roadmap due on Jan 14Hi Yan:

I have read the outline that you sent out and I am most interested in the TNO part. I have been working on a paper in which I demonstrate the limitations of the current TNO taxonomy. I show that each taxon has a large degeneracy when it comes to surface composition. The analysis was done by means of a large database of models (~20k) with a variety of compositions. The main reason for the degeneracy is due (I believe) to the choice of filters that were available for the taxonomy and the lack of albedo measurements for a still large number of objects.

I would be happy to provide more information if you think that it would help in the writing of the document, however, since this is ongoing research that I have just proposed to NSF and for which I am writing the first paper now, I am a little reluctant to leave it out in the open for everyone to see. What do you think/advise?


On 1/4/11 3:57 PM, "Yan Fernandez" <> wrote:

Hi Josh -- Good point, I'll add that bullet in to the outline.

To all: any takers on text writing?

On Jan 2, 2011, at 1:49 PM, Hopkins, Josh B wrote:

> Yan, thanks for heading this up.
> I’d like to suggest another topic for the “current issues” section.
> We need more follow-up observations to really determine orbits of
> many of the small bodies as they are discovered so that they don’t
> become lost. Many Near Earth Asteroids are being detected by the
> surveys and given preliminary designations but their orbit
> determination is too poor to find them again at their next
> opposition. I just did a quick check of all NEAs discovered in 2006
> (a year picked randomly but intended to be far enough back for some
> follow up observations to have occurred since then).  The median
> data arc for all NEAs discovered in 2006 is only 34 days. Roughly a
> quarter have orbit uncertainty codes of 8 or 9 (0-9 log scale where
> 0 is good).
> Josh Hopkins
> From: Yan Fernandez []
> Sent: Thursday, December 30, 2010 8:51 PM
> To:
> Subject: EXTERNAL: [SBAG Population Identification &
> Characterization] population section draft of roadmap due on Jan 14
> Hi everyone -- It's time to start thinking again about the 'population
> identification and characterization' section of the SBAG Roadmap.
> When we last left this back in August, I presented to SBAG a brief
> outline of our section. I'm attaching that presentation to refresh
> everyone's memory.  It's a short PDF.
> The outline upon which this SBAG presentation was based is online
> (at ),
> but this is the outline from July 28. So it's a bit old. I've taken
> that outline and updated it, expanding it a bit, and incorporating
> the comments that were sent to me in July and the comments I got
> from the SBAG meeting participants.  The new, updated outline --
> dated December 31 -- is attached.  Let's consider this the current
> version.
> The next step is to convert this outline into a real document.  So
> right now I'm asking for volunteers to tackle various parts.  If
> you have a desire to write or help write some fraction of the
> document, let the group know --- and please let us know soon!
> The section draft is due on January 14, ie. only about 2 weeks away.
> Then the draft will be open for community discussion until the next
> SBAG meeting in the end of the month. I'm scheduled to give a talk
> at that meeting about our section on January 25.
> Thanks!
> --Yan
> < span style='font-family:"Helvetica","sans-serif"'>--Dr. Yan
> Fernandez, Asst. Prof. of AstronomyDepartment of Physics,
> University of Central, http://

Dr. Yan Fernandez, Asst. Prof. of Astronomy
Department of Physics, University of Central Florida,

This Thread
  Date   Author  
10-Jan-2011 Yan Fernandez
* 06-Jan-2011 Cristina M. (ARC-SSA)[ASRC Research & Tech Solutions]
04-Jan-2011 Yan Fernandez
This Author (Jan-2011)
  Subject   Date  
* EXTERNAL: 06-Jan-2011