[TML] Noncanonical TU 3D.

[Jerry W Barrington]

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