What's New

Choosing A Telescope

Telescope Aperture Considerations

Astronomical Sketches

Introduction to Planetary Sketching

Visual Observations

Refractor Dobsonian Style Mounts

Equipment Reviews

Favorite Quotes

The Bonds: Pioneers of American Astronomy

Saturn's Encke Minima and Encke Division

Nature and Travel Photography

Astrophotography

Astronomy Humor

Glossary

Recommended Astronomy Books

Links

Home

May 13th, 2011, 2:40 - 3:00 UT, seeing good-excellent, with mostly clear skies but high clouds reduced the contrast and obscured the fine detail from time to time, transparency 2.0.

TMB 130mm (5.1") f/9.25 refractor on a alt-az mount. Magnification mostly 255x - 298x with Baader binoviewer. I briefly tried 341x - 409x but the seeing wouldn't support it. Filters used: none and Baader Moon & Skyglow filter.

In the above sketch the preceding limb is on the left, the following limb is on the right, south is at the top, and north is at the bottom. The North Polar region is now tilted towards the Earth.

The South Polar Region appeared light blue green in color.

The North Equatorial Belt appeared light brown in color.

The Equatorial Zone appeared light yellow in color.

The North Polar Region (NPR) appeared green in color. The NED appeared as a light colored zone with an irregular outline in the NPR.

The shadow of the globe was visible on the following (right hand side) of the rings, giving the planet a 3-D look to it. The rings cast a shadow on the front of the globe.

The Cassini Division was noticeable on both ring ansa near the edges.

In the TMB 175mm with steady seeing Titan appears as a disk with a slight reddish-orange color to it. I was not able to resolve it as a disk in the 130mm, however it appeared large in the 130mm at higher magnifications.