White in color with a white tail sperical shape

This was not a space craft or a plane.  It looked like a comet with a tail that expanded out from the ball.  It was visible in the southern sky for 2 to 3 minutes over the Dallas, Texas, area.  It eventually went out of site.
I sent this message to a local TV station but did not get a response.
Around 12:40 to 12:45PM today, I saw what looked like a Meteor or Comet in the southern sky.  It was visible for 2 to 3 minutes.  Do you all know what it was?  It defiantly was not a plane.
Do you know what this was? Thank You, Jeff PS I have seen the space shuttle come over our area 2 times.  The smoke trail that it left was visible in the sky for several minutes.  The object I saw yesterday tail diapered a few seconds after it had reached any certain point in the sky.  The farther it went the less of the tail I saw.  Eventually as went went farther away you could just see a round light.  I would think that it was very high or in a high orbit.  It may have been a meteor but all the falling stars that I have seen only last a second or 2.
I think it was some kind of a celestial body and not a spacecraft of some kind.  I really would like to know what it was.
Possibly a high-altitude a/c, with a contrail behind it?  PD