The Lunar Eclipse of 9 January 2001

Observed from Munich Trudering, Manfred Rudolf

During the lunar eclipse of 9 January 2001, I shot some photos from our garden in Trudering. Fortunately, the weather was excellent, so the lunar eclipse could be recorded in its entirety.

Partial phases: the moon enters the Earth's shadow:

At about 20:50, the moon has completely immersed into the Earth's shadow.

The images below show the totally eclipsed moon immediately after begin of totality (right), mid-eclipse (center) and short before end of totality (left).

Note the differences in umbral density while the moon traverses the Earth's shadow: The outer regions of the shadow are considerably brighter than the central region. Compare also with the graph to the left.

You can also see the relative movement of the moon with respect to the background stars.

Occultations of stars during the eclipse:

During the lunar eclipse, the moon occulted several stars. The image below identifies some stars near the eclipsed moon. To compensate the relative motion of the moon during the exposure, the camera was moved with "lunar speed" which is slightly less than the daily sidereal motion. Therefore the stars do not appear point-like but are recorded as short trails.

Apart from the star's SAO catalog number, the magnitude and the spectral class are shown. Note that the star trails appear in different colours (white, yellow) due to the differences in their surface temperature (spectral class).

The star SAO 79401 (cf reference above) is just before occultation on the image taken at 21:30, is then occulted for several minutes (images at 21:33 and 21:36), and reappears on the Moon's northern limb at 21:40.

Also the star SAO 79425 is occulted during totality, compare the images taken at 21:33 and 21:36.

After traversing the Earth's shadow, the partial phases of the lunar eclipse are visible again:

The pictures have been shot with a Maksutov lens 900mm/f-6 and a lens 300mm/f-4, with exposure times from 1/8 sec. (partial phases) up to 20 sec (totality), on Fuji Velvia and Kodak Ektachrome 200 films.