Time: 21:08 - 22:00 U.T.
Telescope: 102mm SCT
Magnification: 72x
Filters: Polarizing
Seeing: Fair to Good
NELM: Daytime
Temperature: +51 F (+11 C)
The above sketch shows the region around Hercules (bottom) and Atlas. North is to the upper right; and west is to the lower right in this mirror-reversed sketch. This sketch is the actual 'at-the-telescope' sketch. A polarizing filter helped to improve contrast for this daytime observation of the first quarter Moon.
Daytime observations have some advantages over night observations. There's no need to use artificial lighting for note taking and sketching. The temperature is more comfortable; and it's often possible to catch the object at a higher altitude in the sky.
Day observations also have disadvantages: Contrast is lower for lunar features; and care must be taken in regards to the Sun.
No comments:
Post a Comment