## ASTR 503 Homework 6: Observing the Sky

Due: Nov 24, in class

- Observe at least 6 objects
**not in the solar system**. Draw a sketch using the
**JPG** or **PDF**
observing form (Save it and print it from a print program, or print at 50% from your browser).
Be sure to note the location, telescope used, etc. Use a different page for each session.
One of your objects can be the Sun (use safe techniques!)
- Be able to point out six stars and four constellations in the sky to the labbie!
Have them sign your form that you pointed them out. (They can be some of the same objects
you observe).

**Limiting magnitude:** The "limiting magnitude" is the magnitude of the
dimmest star you can see with your naked eye, looking near the zenith.

**Field of View:** Given the Moon's size in your field of view, you can
estimate the field of view of the eyepiece by seeing how many Moons fit across the field of view.

**Magnification:** Equals the focal length of the objective divided by the
focal length of the eyepiece. The Focal Length of the observatory 16 inch telescope is 4 m;
of the 11-inch Celestron is 2m; of the 8 inch, 1 m. Eyepiece focal lengths vary from 4mm to 35mm

There will be at least four evening sessions, but we get clouded out a lot, so be sure
to come to the first possible session you can! Or, you can go the "George Observatory"
(in Brazos Bend State Park) any clear Saturday evening. (We may do a campout, date TBD)

Writeup due in class Nov 24.

Nominal requirement: 6

MAXIMUM credited: 7

Last updated Sept 2, 2014