| NOTES |
DATE:
|
Tuesday,
September 26, 2006
|
TIME:
|
9:20 -
9:37
pm EDT
|
CAMERA:
|
Canon
EOS 300D Digital Rebel (unmodified)
|
EXPOSURE:
|
9
× 1
minute @ ISO 800 |
| LOCATION: |
Owl
Observatory - Kalamazoo
Nature Center |
INSTRUMENT:
|
Meade
12" LX200 SCT @ f/6.3 with Lumicon Giant Easy Guider |
PROCESSING:
|
Images obtained with DSLRFocus 3.
Dark frame subtracted, aligned, stacked,
enhanced and cropped with
Adobe Photoshop 7.0 |
COMMENTS:
|
The
Great Hercules Cluster (M13) is located 25,000 light-years away outside
the disk of the Milky Way Galaxy. It can be located about
2.5° south of Eta Herculis in the popular Keystone asterism in
Hercules. It can be spotted with the naked eye under excellent
conditions, but is an easy target with binoculars and a stunning sight
through most telescopes. The cluster itself is approximately 140
light-years in diameter and contains up to 1 million stars. Most
of the stars in M13 are classified as Population
II stars, meaning they're very old and metal poor (composed of
hydrogen and helium with few heavier elements).
|
|
