A can of Mars!

[Phil Dombrowski]

"A can of Mars!". This is adelightfully simple but very effective way of identifying surface albedo features on Mars. By using a standard map like
http://www.damianpeach.com/images/ma...dp_labeled.jpg You
can enlarge, increase the contrast of the labels, etc then cut the
finished product and wrap it around an appropriate sized metal can.
If you know the central meridian of Mars at the time you observe you
will find the can most helpful in identifying what you see. Remember
to take into account the following information: use Universal Time for
your calculation of the central meridian, place South at the top
(avoid a diagonal as it will drive you nuts trying to figure out if
you need a mirror image upside down or not!) You might find this
website helpful when you are getting ready to do your Mars observations.
http://freeware.intrastar.net/astronomyone.htm is a freeware website where you can download Meridian and other neat free programs.
This Mars opposition will be a good one. It occurs on 12/24/07 when
Mars will have a high declination of +27d. At local midnight Mars
will be ~74d high in the sky. However it will no be especially close
to Earth. Mars will only be ~15.8" in diameter so medium/high
magnification will be needed.
Enjoy making the Mars can! You will find it to be a true "gem" in
your observing strategies this coming winter.
best,
Phil Dombrowski

[John R. Duchek]

Thank you. This is a very nice idea. I need to make one!
John