Choosing A Telescope
Telescope Aperture Considerations
Introduction to Planetary Sketching
Refractor Dobsonian Style Mounts
The Bonds: Pioneers of American Astronomy
Saturn's Encke Minima and Encke Division
Nature and Travel Photography
Recommended Astronomy Books
May 28, 2006, 2:15 - 2:30 UT, seeing 2-3/10 (poor - fair), transparency 4.9. Central meridian longitudes: System I: 339.0°, System II: 111.9°.
TMB 130mm f/9.25 refractor on alt-az mount. Magnification 170x with Baader binoviewer. Filters used: none, 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 poor to fair seeing limited the amount of fine planetary detail that was visible.
In the southern portion of the globe the South Polar Region (SPR), the South Tropical Zone (STropZ), and the South Equatorial Belt (SEB) were visible. The SPR had a tan color to it. Along the southern edge of the SEB the Great Red Spot (GRS) appeared light pink in color. Following the GRS the SEB appeared to be bisected by a rift possibly composed of a number of ovals but I wasn't 100% sure. The southern portion of the SEB (SEBs) appeared reddish-tan in color, while the northern portion (SEBn) appeared gray. "Red Jr.", oval BA that has changed color from white to red, followed the GRS and was visible along the northern edge of the SPR but I did not note a red color to it.In the Equatorial Zone (EZ) several large festoons were visible extending from the North Equatorial Belt south (NEBs) and connected to a faint Equatorial Band (EB). The EB usually appears more near the middle of the EZ, but this time it appeared offset towards the South Equatorial Belt (SEB). The EZ appeared veiled or shaded. No shading was visible along the SEB south (SEBs).
The NEB had a reddish-brownish color to it. The North Tropical Zone (NTropZ) was visible between the NEB and the North Polar Region (NPR), and the shadow of Europa was visible in the NTropZ. The NPR had a green-tan color to it.
Limb darkening was noticeable on following limb of the globe.
The moons appeared as disks, with Callisto appearing gray in color, Io white-orange in color, and Ganymede yellow in color. After Europa completed its transit it became near the preceding limb of the Jupiter and it appeared as a disk.
After finishing the above sketch I observed several deep-sky objects. First up was Alberio, a very pretty double star located in the constellation of Cygnus. Alberio has one blue star and a golden yellow star, and they looked very nice through the telescope at 60x. While moving the telescope over to Lyra to observe M57, the Ring Nebula, I chanced upon a smaller, less bright version of Alberio, which was pretty also. M57 showed its ring structure well in addition to the darker inner portion. Last up was M13, the Great Cluster of Hercules. At 60x it its outer portion was resolved as was across its center. All in all it was nice to be out under the stars, even with the seeing being only fair at best.