Hitchhiker's Guide to Rukl Chart 72
CCD image of Clavius and Maginus.
Robin Casady's labelled
image of Clavius for a chart of the smaller craters in and around
- Clavius (JRF <freeman _at_ netcom.com>)
- Clavius is a "landmark" feature, easily recognized and useful for
orientation. Overlapping craters Porter and Rutherford make it
particularly simple to identify. Clavius D, C, N, and J form a
prominent arc on its floor, and there are a wealth of smaller craterlets
- Clavius at sunrise (...Akkana)
Sunrise over Clavius is beautiful. I caught and sketched the sequence at right
at a public star party; the sketch at left, two months later from my driveway.
- Clavius at sunrise (Robin Casady)
This CCD image of the sunrise over Clavius was taken
the same night as the two sketches above right.
- Clavius (Philip Sacco <ppsacco _at_ mindspring.com>)
The crater Clavius was a wonder to view around, as the terminator was cutting
thru the middle of it by the time I got to it.....The Western rim of the crater
was in bright sunrise, while the crater floor east of the rim was stillin
shadow. Craters C and D were well illuminated as was the area in the immediate
vacinity, whil the areas to the West and East of clavius' floor were still in
shadow. This optically allowed one to see the amount of rise the middle area
of Clavius' floor displays unlike other times of illumination when the entire
floor apears evenly lit....
There was a very brightly lit extension running south of Porter pointing
towards crater C. The extension doesn't appear in the Rukl Atlas, however it
must be a slight rise on the southern rim of Porter jutting southward.
In measuring the diameter of Clavius I found the Eastern rim to entail some
36-42 km of inclined wall from the surrounding terrain to the inner edge of the
rim. The elevation of the Eastern rim cast a wide shadow across the floor of
Clavius towards C and D. This central area was fully illuminated as I noted
previously, and it gave a very interesting indication of the contours and
slight elevation of Clavius' central floor area around D/C complex.
Longomontanus Sunrise Ray
The crater ray that Donald [Donald Qualls, aka The Silent Observer]
[editor's note: in an April 27, 1999 posting on
the shallow-sky list, and followup discussion
pinned down what crater it was -- see the
archives for the
was very likely in the crater
Longomontanus. I was video imaging the moon Saturday night / Sunday
morning and captured an image
of Longomontanus showing a v-shape, ray-like
light crossing the smooth crater floor.
There is a small group of peaks
near the center of Longomontanus and they did indeed cast a shadow across
the floor almost to the western wall of the crater. I have never seen the
but I have little doubt that it would be similar in
appearance to the light on the floor of Longomontanus.
- Scheiner (David North <d _at_ timocharis.com>)
Scheiner has a series of craters in an "L" shape, similar in size and
apparent age to the more noted arc in Clavius. There are other craters
of this type all over the area; I don't know if this implies an "event"
or if they are just coincidental, but it's pointed to note such a
similar feature so nearby.
- South Pole region (Steve Coe <scoeandlross _at_ sprintmail.com>)
Blancanus--this crater has a smooth floor except on the
south side, where there are 12 little craterlets that mark
up the floor of this sizeable crater. There is a tiny
central peak and some terracing in the walls.
Scheiner--is a medium size crater with a central craterlet
rather than a peak. There are two other craters of equal
size on the north side of the crater floor. A rille cuts
this crater into 1/3 and 2/3 pieces in a E-W path. Several
small craters are on the walls, which are somewhat terraced.
Klaproth--has a very smooth floor within this large crater.
The south wall is overlapped by crater Casatus. There is
a small amount of terracing in the walls, but not much.
Originally I did not see any craterlets on the floor of
this crater, but in a moment of good seeing, two tiny
craterlets appeared for a moment on the north side of
Casatus--is about the same size as Klaproth, its north
wall is the south wall of Klaproth. The are two obvious
medium sized craters within this larger one, one of the
craters is on the south side of the floor and one is
in the center of Casatus.
This page last modified: Dec 06, 2020
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Copyright the individual authors.
The Hitchhiker's Guide to the Moon Compilation is
© Copyright 1999,2000,2002 Akkana Peck.
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