These can only be observed using low-light level cameras running at 25 frames per sec,
or faster, and capable of recording 9th or 10th magnitude stars in real time.
Dates/UTs of observing runs, or detections of impacts, should be emailed to:
ALPO - email: c u d n i k @ s b c g l o b a l . n e t
BAA - email: a t c @ a b e r . a c . u k
UAI - email: a m . 5 4 8 5 2 @ g m a i l . c o m
BAA Request: Can you see, or image, 4 points of light in the
shadowed floor of the crater? How do these change in
appearance over time? This is not a TLP but is still
interesting to observe as it might look like a string of
pearls effect. Please send any images, or sketches, to:
a t c @ a b e r . a c. u k
These can only be observed using low-light level cameras running at 25 frames per sec,
or faster, and capable of recording 9th or 10th magnitude stars in real time.
Dates/UTs of observing runs, or detections of impacts, should be emailed to:
ALPO - email: c u d n i k @ s b c g l o b a l . n e t
BAA - email: a t c @ a b e r . a c . u k
UAI - email: a m . 5 4 8 5 2 @ g m a i l . c o m
These can only be observed using low-light level cameras running at 25 frames per sec,
or faster, and capable of recording 9th or 10th magnitude stars in real time.
Dates/UTs of observing runs, or detections of impacts, should be emailed to:
ALPO - email: c u d n i k @ s b c g l o b a l . n e t
BAA - email: a t c @ a b e r . a c . u k
UAI - email: a m . 5 4 8 5 2 @ g m a i l . c o m
ALPO Request: On 2012 Feb 28 Raffaello Braga noted that only the
tip of the central peak was visible. Most of the crater was in
darkness - this was normal at this stage in illumination. When
viewed through a red filter, the central peak was visble, but
however when viewed through a blue filter it was invisible.
Please try to observe this crater visually with red and blue
filters, to see if you can replicate this effect? If so then
check for similar effects on other craters on the terminator.
Otherwise try to obtain some high resolution colour images. This
work is suitable for telescopes of 4" aperture or larger - if
you have a choice of a efractor or a reflector, please try the
refractor. Please send any observations you make to:
a t c @ a b e r . a c . u k
ALPO Request: On 2011 Dec 31 Raffaello Braga found the north rim
or Torricelli to be very bright at the start of the observing
session but dimmed considerably later. He was not sure on the
normal appearance of this crater, hence why it is really
imortant to establish this by re-observing under similar
illumination. Minimum telescope aperture required: 3", and try
to use a refractor if possible. Please send any high resolution
images, detailed scetches, or visual descriptions to:
a t c @ a b e r . a c. u k .
These can only be observed using low-light level cameras running at 25 frames per sec,
or faster, and capable of recording 9th or 10th magnitude stars in real time.
Dates/UTs of observing runs, or detections of impacts, should be emailed to:
ALPO - email: c u d n i k @ s b c g l o b a l . n e t
BAA - email: a t c @ a b e r . a c . u k
UAI - email: a m . 5 4 8 5 2 @ g m a i l . c o m
BAA Request: Examine the floor visually, sketch, or image to
show the progression of the shadow spires across floor. If
observing visually, how would you describe the appearance of
the central lit area on the floor? If imaging, do a time lapse
e.g. 1 image per minute to show the progression of the shadow
spires. We are asking for these observations following an
observation by N. Travnok (Brazil) on 2020 Jul 27 UT 23:00 who
commented on an unusual appearance to the floor. It would be
really useful to have visual observing of the appearance and
please note down what the seeing conditions are like. If you
want to image it at high resolution, please go ahead but
remember that any image stacking should not be from sections
of video of longer than 1 min duration as the shadows change
in length rather quickly at sunrise. Any sketches, visual
descriptions, or images taken, should be emailed to:
a t c @ a b e r . a c. u k
ALPO Request: This request comes about because of two
observations. Firstly on 2009 Nov 25 Paul Abel and others
detected some colour on the inner west illumntated slopes of
this crater. No similar colour existed elsewhere. On 2012 Aug
25 Charles Galdies imaged this crater and detected a similar
colour, approximately in the same location, though he also
imaged colour elsewhere. It is important to replicate this
observation to see if it was natural surface colour,
atmospheric spectral dispersion, or some effect in the camera
that Charles was using, namely a Philips SPC 900NC camera.
The minimum sized telescope to be used would ideally a 8"
reflector. Please send any high resolution images, detailed
sketches, or visual descriptions to:
a t c @ a b e r . a c. u k .
ALPO Request: Try viewing the central peak through a red and
blue filter e.g. Wratten 25a and 38, and comparing the
brightness to the of the eastern sunlit rim. Does the size
of the central peak change between filters? If you do detect
colour here, obviously check for colour on other central
peaks. If taking colour images, make sure that you do
nderexpose slightly so as to avoid saturating the central
peak. All visual reports, sketches or colour images should be
emailed to:
t o n y . c o o k @ a l p o - a s t r o n o m y . o r g
BAA Request: Is there a dark shaded area on the floor of size
approximately ~1/4 diameter of Sinus Iridum and on western
interior by the rim? Telescopes as small as 2" apperture can be
used for this study at a magnification of approximately 110x.
Any visual descriptions, sketches or images should be emailed
to:
a t c @ a b e r . a c. u k .
ALPO Request: Any sign of brightness changes or flashes from
this crater?. Minimum sized telescope aperture to be used: 4".
Any sketches, visual reports, or monochrome image sequences
should be emailed to:
t o n y . c o o k @ a l p o - a s t r o n o m y . o r g
ALPO Request: Monitor this crater over time to see if there
are any brightness changes inside. A minimum sized scope to
use for this would be an 8" reflector. Any visual
descriptions, sketches, or colour images should be emailed
to:
t o n y . c o o k @ a l p o - a s t r o n o m y . o r g
BAA Request: Two observers have reported colour on the rim
around this colongitude, once in 1938, and again in 2013. Please
take a look and report what you see, and where on the rim.
Please send any high resolution images, detailed sketches, or
visual descriptions to: a t c @ a b e r . a c. u k .
ALPO Request: Images needed of this part of the Moon. Can be
taken with small telescopes - we just need to compare some of
the ray areas to an image taken during a lunar eclipse. All
images should be emailed
to:
t o n y . c o o k @ a l p o - a s t r o n o m y . o r g