[TML] Noncanonical TU 3D.

[shadow at shadowgard.com]

On 1 Jan 2008 at 21:10, Jerry W Barrington wrote:

> On 1/1/08 1:41 AM, "Jerry W Barrington" <jursamaj at yahoo.com> wrote:
> 
> > I have a set of files listing stars within 50, 100, and 1000 LY.  The
> > biggest one has (if I recall), over 70,000 stars.  But there will be a lot
> > of dimmer stars missing out that far, lots of those M dwarf stars.  That's a
> > problem with any star catalog.  And it has a lot more than just positional
> > data.  Would that help you out?
> 
> With reference to the lack of dim stars, I made a graph of the 32000 dimmest
> stars in my list of 77,000 stars mentioned above.  Link is below (PNG
> format).  The horizontal scale is in Absolute Solar Luminosities.  The
> vertical scale is in Squared LY from Sol (the 1,000,000 at top is actual
> 1,000 LY).  The 3 dots at the bottom of the chart include Alpha Centauri &
> Proxima Centauri, and something else I haven't identified.
> 
> Note the complete lack of stars left of the pink line, and how few are just
> right of it.  Stars should be there, but are too dim to be seem at that
> distance by the Hipparcos telescope.  This is a major shortcoming of all
> star catalogs.  :(
> 
> <http://briefcase.yahoo.com/jursamaj>
> Folder: Star Stuff
> File: HipparcosLimits

The folder isn't public.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com