[Aavso-photometry] Short-Exposure Photometry

[Brian Warner]

One of the questions that have been asked of the Park Service Rangers is:

  "At what altitude do the deer turn into elk?"

Along those lines, "at what point does a transit become an eclipse?" The general physical geometry
is the same: one body going in front of another.

If eclipse means "the more distant body is completely covered", then why when the moon goes across
the sun but is a tad too small is the event called "an annular eclipse" and not a "transit"? ;=)

I've had _two_ cups of coffee and the caffeine _still_ hasn't kicked in! As one gets older, he needs
either more caffeine or jumper cables <g>

I second Arne's recommendation to give the upcoming event a try. It's good practice for higher
precision work. That's always worth a little time.



Clear Skies,
Brian Warner
Palmer Divide Observatory (IAU 716)
http://www.MinorPlanetObserver.com

Collaborative Asteroid Lightcurve Link (CALL)
http://www.MinorPlanetObserver.com/astlc/default.htm

"Do thou amend thy face, and I'll amend my life" ...
William Shakespeare (1564-1616),
British dramatist, poet. Falstaff, in Henry IV,...