Saturday, August 23, 2008

Jupiter's Great Red Spot

Jupiter's Great Red Spot as observed from Backnang, Germany in Holger's backyard observatory. The telescope was a 20cm GSO newton, extended to f/20 using a 4x achromatic barlow lense. We used a modified ToUCam Pro II webcam on a Losmandy G11 mount. Copyright (c) 2008 by Holger Weber and Panagiotis Xipteras

Thursday, August 21, 2008

Sunday, August 17, 2008

The partial moon eclipse @ Aug, 16th 2008

The partial eclipse of the moon on Aug, 16th .2008. Notice the curvature of the earth globe on the moon surface! This photo is taken at 22:18 Uhr MEST.
Scope: FS-60C reduced @ f/4.4
Cam: Modified ToUCam Pro (WrCmac)
Mount: Defect EQ2. Manuel guiding (no motors)
Software: 384 shots added and sharped with GIOTTO v2.08

Monday, August 11, 2008

Observing Gamma Microscopii

Tonight August 11th, 2008 at 0:10 MEST I observed Gamma Microscopii (Gamma Mic) using my Minox 6x16 monoculars. I used the star hoping method coming from the triangle Psi- /Omega-/24-Capricorni down to Gamma Mic. Even to its low declination here in Stuttgart/Germany (DE=-32) it is still visible using a small visual aid ;-)

Gamma Mic is not much hotter (5100 °K) than our Sun but it is 10 times bigger and 64 times more luminous than it. Its magnitude of 4,67m indicates its current distance from the earth, i.e. about 224 light years. Its spectral type is G8III. Its B-V index is 0.89, this is something between white and yellow. Four million years ago, Gamma Mic was one of the brightest stars in our firmament due to its small distance from the Sun (6 light years) at that time.

The Microscopium is a small southern constellation, rarely observed in Germany.