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 .
BAA Request: Mare Humboldtianum. We are trying to replicate,
using modern day images, a sketch in Plate I in BAA The Moon
from published: 1950 Jun Vol 1, No. 1. Its for a sketch by
K.W. Aboneri from 1949 Sep 7. Please send any images to:
a t c @ a b e r . a c. u k .
BAA Request: Do the appearance of the bands on the crater rim
vary (blur) in appearance over time? Compare them to bands in
other craters e.g. Herodotus, Kepler, Copernicus. If you do
see any variations in sharpness, see how it relates to
atmospheric seeing condtions. All images or sketches should
be emailed to:
a t c @ a b e r . a c. u k
BAA Request: On 2011 Jan 21 Nigel Longshaw suspected the
eastern side of Geminus (on the border of the crater filled
shadow and the eastern illuminated rim) had a colouration to
it. This extended for a short distance from the floor shadow
into the illuminated rim width and spanned from the north to
the south of the crater. For a comparison, Cleomedes was
checked but nothing unusual was noticed in its shadow. The
observer notes that Elger also saw colour here too. Its
probable that some natural surface colouration was observed,
but this needs to be checked out? Telescopes of aperture 4"
or larger are needed to observe this effect. If you have a
refractor, then try using this, otherwise a reflector will do
just as well. Please send any sketches, images, or visual
descriptions to: a t c @ a b e r . a c. u k .
BAA Request: Cyrillus. There is a small white craterlet just
north of the three central peaks. We are interested to receive
high resolution images of this in order to find out at what
selenographic colongitude, in the lunar evening, that it loses
it's white spot appearence. Please use scopes largher than 6
inches in diameter.
Please email these 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: Its around this Co-Longitude that some observers
have reported seeing an Ashen Light effect on the shadowed floor
of Plato, caused by scattered light off of an illuminated peak
on the rim. Please have a go either visually, or with long
exposure time lapse imagery to see if you can pick up the
development of this weak illumination effect on the floor.
Please send any sketches or images 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
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
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
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
Ukert: a "V" on the Moon - this is a Clair-Obscur effect.
Clair-Obscur have no scientific importance and are just tricks of the
light that make us think we see something like a letter of the alphabet
or a shape or face. Clair-Obscur effects are scientifically pointless
to observe. However, if you want to be thrilled, or obtain an image to
impress someone then give them a go. If you do observe, or image this,
by all means send your observation into ALPO or the BAA, but we
probably won't publish, but will nevertheless retain in our archives,
just in case features elsewhere in the image are of interest to
future researchers.
Werner: an "X" on the Moon - this is a Clair-Obscur effect.
Clair-Obscur have no scientific importance and are just tricks of the
light that make us think we see something like a letter of the alphabet
or a shape or face. Clair-Obscur effects are scientifically pointless
to observe. However, if you want to be thrilled, or obtain an image to
impress someone then give them a go. If you do observe, or image this,
by all means send your observation into ALPO or the BAA, but we
probably won't publish, but will nevertheless retain in our archives,
just in case features elsewhere in the image are of interest to
future researchers.
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
Apollo 11: This is what Mare Tranquillitatis would have looked like
on the night that Apollo 11 lifted off from the Moon. Aim for the
area north of Moltke crater. The illumination and the shadows are
exactly the same. There is no scientific value in imaging
this, but from the nostalgic point of view it might be interesting
to observe. Feel free to send your observation in to the BAA or
ALPO and we will put it in our archives, but as we have
a lot of these images already, we may not publish it, unless it is
exceptionally high in resolution. Minimum diameter scope to use
would be 20cm, but larger apertures are preferred:
BAA Request: It has been noticed that a bright carterlet can
appear very suddenly on the floor of Plato in between needle
like shadows, during local lunar sunrise. This happens in the
space of just a minute or so, and can look really quite dramatic.
This effect was first spotted by Brian Halls on 2014 Oct 31
Please send any high resolution images, detailed scetches, or
visual descriptions to: a t c @ a b e r . a c. u k .
BAA Request: On 2012 Sep 24 E. Horner noticed a very strong red
colour around part of the sunlit inner rim of Copernicus,
sometimes a 1/4 and sometimes 1/2 around the interior. Quite
likely this was some form of atmospheric spectral dispersion -
though the observer checked for similar effects on other craters
but saw none. But to be sure we would like to obtain some colour
images or visual observations of this crater. The minimum sized
telescope to be used would ideally a 6" reflector. Low elevation
angles for the Moon are ideal as we want to try to replicate
this effect if it is indeed due to atmospheric spectral
dispersion. Please send any high resolution images, detailed
sketches, or visual descriptions
to: a t c @ a b e r . a c. u k .
Apollo 16: This is what the lunar surface would have looked like
when Apollo 16 blasted off from the Moon. Aim for the area
North of Descartes. The illumination and the shadows are
exactly the same. There is no scientific value in imaging
this, but from the nostalgic point of view it might be interesting
to observe. Feel free to send your observation in to the BAA or
ALPO and we will put it in our archives, but as we have
a lot of these images already, we may not publish it, unless it is
exceptionally high in resolution. Minimum diameter scope to use
would be 20cm, but larger apertures are preferred:
ALPO Request: On 2013 Apr 22 Paul Zellor noticed that the two
closely spaced NW dark bands in Aristarchus had some (non-blue)
color to them. Can we confirm his observation of natural colour
here? Ideally you should be using a telescope of 10" aperture, or
larger. Please send any high resolution color images, detailed
sketches, or visual descriptions to: a t c @ a b e r . a c. u k .
BAA Request: Cavendish E - we are attempting to check out two
reports made on 2021 Jun 22 UT 20:44 and 2025 Sep 04 UT 20:04
which both said that part of the northern rim of this crater
was as bright as Aristarchus. Visual observation or images
- high resolution and/or wide angle (to compare with other
bright features) would be welcome. Telescopes of aperture 5",
or larger, should be used. Please send any images to:
a t c @ a b e r . a c. u k .
ALPO Request: Take a look at the bright area on the crater
floor, and the bright east facing part of the western rim, in
red and blue light e.g. Wratten 25 and 38A. Do these look
brighter to you in red or blue light? If you have these filters,
is it the fact that the Wratten 38A filter, being denser, makes
these areas brighter in one filter than in the other? Test them
out on other features. 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
ALPO Request: Compare the crater in red and blue light - if
possible use Wratten 25 and Wratten 38A filters. If its
brighter in one filter than the other, is this because one
filter is a lot darker than the other, or is the effect
confined only to this crater? 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