- Palus Epidemarium double ray (...Akkana)
8/20/99 at 10:30pm PDT, at the SJAA public star party at Houge Park,
we were entranced by a lovely pair of rays in Palus Epidemiarum.
I made this sketch with my VX102 refractor (then flipped it later
to match with the map view), but in a nearby 10" reflector, interesting
detail was visible, barely illuminated by the rays,
on the floor of Palus Epidemiarum.
- Palus Epidemarium (David North <d _at_ timocharis.com>)
Tonight offered up a clear winner in the Marsh of Nasty Diseases; the "bad
skin" was irresistable. It was placed ideally right at the terminator, and I
was able to trace out every last thread of Rimae Ramsden and Hesiodus. But
just tracing them wasn't the point; in the C8 they were dark and distinct
enough to literally look like rayed cracks in the floor, a wonderful
aesthetic. Capuanus looked oddly overfull in the early morning light, giving
an impression similar to Wargentin. The central peak in Campanus was very
distinct tonight (edgy seeing with breaks of steadiness between clouds...)
and it made a nice pair with Mercator. The light was simply ideal to show
this area at it's best, including (of course) the Hippalus rille structure
crashing into Agatharchides. I've been struck before by how this
crater/wreck looks like it leaked out into the rille and down toward the
On another night, I got a very good
look at them last night (July 4) through several scopes, including a 7" AP
and a 7" Questar. They're incredible; crosshatched kind of like Triesnecker
but both easier and more complex. The variation of thickness and angle of
the light made this observation one of the more fascinating I've seen on the
moon, since the angle was low and it was possible to watch the "visibility"
change from half-hour to half-hour. Alternately, for some reason I found
rima Hesiodus more difficult than usual.
- See also discussion on Rukl chart 53.
- Palus Epidemearum (Steve Coe <scoeandlross _at_ sprintmail.com>)
The Swamp of Epidemics is a large, flat bay with 5 small peaks
poking up through the lava floor. There
are also several very ruined craters that
just appear as a short arc to mark their
passing. The floor is somewhat darker
than Mare Nubium.
- Cichus Sunrise Ray (Larry B Smith <KTBNDRY _at_ paonline.com>)
- Lacus Timoris Sunrise Ray (Larry B Smith <KTBNDRY _at_ paonline.com>)
I observed a sunrise ray in Lacus Timoris at 19:38 the evening of
Jan 12, 2003. The ray
extended from the eastern lit portion of the lake through the break for
approximately 60 km. The break in the mountains is at lat. 39.2S, long.
28.5W and ended to a group of mountains, which stick up above the mare
floor (roughly a horseshoe shape). Seeing conditions were very good with
brief periods of excellent, the temp. was 20 F, and the wind light. I
was using a 12.5" Dobsonian at approximately 175X.
I was observing the terminator (20:00 EST) near the crater Cichus. Just to
the south of the Cichus A crater (Rukl Chart 63) is a triangular
depression. I observed what appeared to be a sunrise ray. The ray projected
westward from the notch in the wall of the triangular depression (located
at approx. 36.5 deg. south, 20.5 deg. west) onto the floor. Later (20:30 to
20:45) the ray broke up along the south-southeast side into jagged peak
shadows (similar to the type of shadows that are easily seen on the floor
I video taped this area of the moon, to document what I saw,
but the quality is not the best. See the digitized version at right.
The ray may be seen clearly on the original video. I'm attempting to
use a camera and the original video to produce a better quality picture.
The telescope I used was a 12.5-inch Dobsonian.
Has anyone else observed this sunrise ray? Please let me know!
- Cichus (Steve Coe <scoeandlross _at_ sprintmail.com>)
A pretty small crater with two
small central peaks. There is lots of
terracing in the walls and a small, fresh
crater on the rim in a PA of 120.
- Capuanus (...Akkana)
A large ghost crater with three straight mountain ridges pointing away
from it; Capuanus looks like a bear paw and claw (see the above image
-- Capuanus is at the bottom just left of center, with the "claws"
extending more or less upward).
It's the western anchor point for long Rima Hesiodus.
All the rilles and other striations in this area make
it look like the bear claw has been scratching away at
- Capuanus (Steve Coe <scoeandlross _at_ sprintmail.com>)
A ruined crater, lots of lava
has filled in this old marking. The floor
is flat and the walls are almost gone,
especially in PA 270, the wall is very
low in this area. There are 4 small craters
in the wall and 2 on the floor. 3 "fingers"
of other ruined craters and small mountain
ranges extend outward from the wall of this
crater in PA's of 30, 60 and 90 degrees.
- Capuanus (David North <d _at_ timocharis.com>)
Remembering the name itself led to the curious mnemonic "gibbous
da money or we Capuanus."
- Ramsden (Steve Coe <scoeandlross _at_ sprintmail.com>)
A medium size crater with pretty
steep walls and some terracing. What is
fascinating about this object is that it is
surrounded by rilles. A cross hatch of
rilles are attached to this crater in PA's
of 0, 30, 220 and 270 degrees. A unique
crater in my memory.
- Rilles (JRF <freeman _at_ netcom.com>)
Note Rima Hesiodus (see Rukl chart 54),
and the complex of rilles just east of Ramsden.
- Hainzel and Hainzel A (David North <d _at_ timocharis.com>)
Just a bit south of Rimae Ramsden
is the curious double crater Hainzel and Hainzel A.
Just at sunrise, "A" had the most spectacular example of terracing I've
noticed on the moon. The impression was well expressed by Wm Phelps as
looking exactly like the terracing in a hillside rock quarry. It was easily
that distinct in the opportunistic light. The structure of the crater makes
one wonder, in fact, why this specacular "A" is named subordinant to the
more subdued Hainzel.