2011-02-07

M 7 Ptolemy's Cluster


HOW TO FIND IT:

You should easily spot this hazy glow at the scorpion's tail. Scan between Lambda Scorpii and Gamma Sagittarii.

WHAT TO LOOK FOR:

M7 must be viewed with low power! Binoculars are great for this one.

A view of M7 covers twice the apparent size of a full moon.


Photo by Pittendreigh
HOW TO FIND IT:
You should easily spot this hazy glow at the scorpion's tail. Scan between Lambda Scorpii and Gamma Sagittarii.

WHAT TO LOOK FOR:
M7 must be viewed with low power! Binoculars are great for this one.
A view of M7 covers twice the apparent size of a full moon.


M7 is also known as "Ptolemy's Cluster" because he recognized it along with M6.

Its luminosity is a modest 2500 suns.

It is best viewed at low power and at 50x it fills the eyepiece.

Its edge is tough to determine because of the Milky Way is so thick with stars in this area.

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