Solar
& Planetary LtE Now for CMO/ISMO #60 (CMO
#434)
Not every email is
necessarily cited in the PDF’s CMO LtE
To see the preceding ones, click
The latest is at the top
¤····Subject: Solar images
20-21-22-April-2015
Received:
Hi Guys clearing a
back log of processing here. These were taken in better solar seeing with the
AP178 also better “collimated”
and working better with a Baader solar continuum filter + IR blocker .
best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Jupiter Images
21-21-23-April-2015
Received:
HI Guys here are a
trio of Jupiters taken over 4 days in decent seeing .
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: solar Images
16-18th-April-2015
Received:
Hi Guys
Here are two white
light shots from the 16th and 4 Ha images from the 18th. The 16th’s
white light (IR742nm) 11:33ut image is of the same pair as the 18th’s
Ha 1059 image . The 11:07ut colourised one shot Ha single stack image shows the
beginnings of that “Marlin fish”
shaped filament that lifted off on the 28th, not long after I imaged it that UK
morning.
Best Wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Solar Images
14-15th-April-2015
Received:
Hi guys a bit focused
on white light capture on those early mornings, before the thermals start. Spot
groups 2321 2324 and 2325 have been interesting to follow .
All Images AP178 +H
wedge +NDs+ Baader solar continuum + IR blocker.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Re: Don Parker
Received:
Dear Carlos,
Though we haven’t communicated in a while, I continue to
appreciate your comments which I not infrequently see on various web pages
(such as Paul Abel’s), and wanted to say thank you, particularly, for the
sensitive appreciation of our friend Don Parker. He was a big man, physically
and otherwise and he made a tremendous contribution to amateur imaging of
the planets. Though I corresponded with him over a number of years and
felt I knew him quite well, I only met him once, and then briefly.
He will be much
missed.
Best wishes on your
own planetary adventures!
Kind regards,
Bill
SHEEHAN
(Willmar, MN)
¤····Subject: Solar
Images 9-12-April-2015
Received:
Hi Guys , Just catching up on the backlog after quite a few clear days
on the Sun and evenings on Jupiter. Some nice solar activity too.
“White light” images are off an AP 178 with wedge ND and IR 742nm
pass filter ( note images later than 20th April are mostly with Baader solar
continuum + IR blocker after some “squaring on” adjustment to the OG cell).
Double stack images
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Jupiter 2015.04.21
with Ganymede
Received:
Dears,
Good conditions at the beginning of the night, just for catching an acceptable
session in infrared, before the wind busts made me play video games with firecapture,
trying to keep Jupiter and satellite in the field.
A festoon near the limb interacting with the North Equatorial Band puts a
beautiful show in infrared with rolling around.
Infrared image:
http://www.astrosurf.com/delcroix/images/planches/j20150421i-20h48.2UT-MDe.jpg
Infrared
animation showing Ganymede movement:
http://www.astrosurf.com/delcroix/images/planches/j20150421i-MDe.gif
RGB
image, almost no details (due to the wind) but the white spot North of NEB
preceding the festoon interaction:
http://www.astrosurf.com/delcroix/images/planches/j20150421-21h02.0UT-MDe.jpg
Steady
skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Dears,
Under less than average conditions, Jupiter with GRS rising, the perturbation
following it with details bright in methane, and several spots in SSTB.
Two infrared images:
http://www.astrosurf.com/delcroix/images/planches/j20150420i-20h37.2UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/j20150420i-21h42.9UT-MDe.jpg
In methane absorption band:
http://www.astrosurf.com/delcroix/images/planches/j20150420c-21h21.8UT-MDe.jpg
In blue:
http://www.astrosurf.com/delcroix/images/planches/j20150420b-20h48.9UT-MDe.jpg
Steadier
skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Hi Guys here are a bunch of Jupiter images from the 8th to 19th
April. April has been a good month for seeing here in the
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Jupiter
Received:
Hi, all
Kindly find attached additional RGB/IR image set from 22 April
with Io and its shadow in transit.
Best regards,
¤····Subject: Jupiter 2015 April 22
Received:
An IR image and an RGB taken during twilight; good seeing.
David ARDITTI (Edgware, Middlesex,
the
http://staglaneobservatory.co.uk
¤····Subject: Jupiter 2015.04.13 with Io and shadow, and Europa
Received:
Dears,
Best conditions in April for me so far for this Jupiter, unfortunately not that
good.
Io's shadow is in transit, additionaly both Io and Europa are visible. GRS is
setting, with the northern projection of its wake just visible, and the
perturbations following it now extended almost on half of the globe.
The nice reddish bar in NNTZ is visible setting, and a small reddish spot at
central meridian North of the busy NEB.
RGB image:
http://www.astrosurf.com/delcroix/images/planches/j20150413-22h00.0UT-MDe.jpg
Infrared
image:
http://www.astrosurf.com/delcroix/images/planches/j20150413i-21h45.0UT-MDe.jpg
Methane
absorption band image:
http://www.astrosurf.com/delcroix/images/planches/j20150413c-22h15.1UT-MDe.jpg
Color
layers:
http://www.astrosurf.com/delcroix/images/planches/j20150413r-21h59.6UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/j20150413g-22h00.0UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/j20150413b-22h00.3UT-MDe.jpg
And
last but not least a short animation in infrared of Io, Io's shadow and Europa
moving:
http://www.astrosurf.com/delcroix/images/planches/j20150413i-MDe.gif
Steady
skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Hi, all
Kindly find attached RGB image from this evening. Conditions
remain a little better although not excellent.
I should have mentioned that Io and its shadow are in transit.
Best regards,
¤····Subject: Jupiter
Received:
Hi, all
Kindly find attached
image set from this evening. Conditions a little better.
Best regards,
¤····Subject: Jupiter 2015.04.12 w/ Io and Europa
Received:
Under very average
conditions, Io getting behind Jupiter and with oval BA transiting, and a small
reddish spot past CM in NNTZ.
Infrared image:
http://www.astrosurf.com/delcroix/images/planches/j20150412i-21h21.8UT-MDe.jpg
RGB
image:
http://www.astrosurf.com/delcroix/images/planches/j20150412-21h38.8UT-MDe.jpg
Methane absorption
band image:
http://www.astrosurf.com/delcroix/images/planches/j20150412c-21h56.5UT-MDe.jpg
Individual layers images:
http://www.astrosurf.com/delcroix/images/planches/j20150412r-21h38.3UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/j20150412g-21h38.8UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/j20150412b-21h39.2UT-MDe.jpg
No impact detected
with DeTect on ~35min of videos ( http://www.astrosurf.com/planetessaf/doc/project_detect.shtml
).
Steady skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Hi Guys here are a
few solar images from the 6th and 8th-April-2015 following the progress of AR
Also in decent seeing
are a trio of Jupiter images.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Jupiter, Io and Ganymede 2015.04.07
Received:
Dears,
Under windy conditions:
http://astrosurf.com/delcroix/images/planches/j20150407i-20h32.0UT-MDe.jpg
No
impact detected with DeTeCt on 20 minutes of video
( http://www.astrosurf.com/planetessaf/doc/project_detect.shtml ).
Steady skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Dears,
First light of my ASI174MM on Jupiter, under average conditions, and with a
focal length a bit short:
http://astrosurf.com/delcroix/images/planches/j20150406i-21h08.4UT-MDe.jpg
GRS
is setting, the rift following it is quite extended now.
Steady skies,
Marc DELCROIX (
http://astrosurf.com/delcroix
Received:
Dear Friends and Colleagues,
One of the
many intriguing findings that our Cassini cameras have made at Saturn has been
the long, sinuous, finger-like projections emanating from the geysering moon,
Enceladus, into the diffuse E ring in which the moon orbits.
Today, I'm happy to say that my research colleagues and I have published a
paper online, in the Astronomical Journal, eporting the origins of these
features in the strongest geysers erupting from the south polar terrain of
Enceladus.
Go to ....
http://ciclops.org/view_event/205
...
and see for yourself how well we are able to match the structures of the
tendrils with our computer simulations of icy geyser particles leaving the
surface of the moon.
This result will ultimately give us a way to estimate the amount of material
leaving the
[Below please find a news release that went out to the public a moment ago.]
Enjoy!
Carolyn PORCO (Boulder,
CO)
Cassini Imaging Team leader
Director, CICLOPS, Space Science Institute
http://twitter.com/carolynporco
http://www.facebook.com/carolynporco
http://carolynporco.com
====================================================
MEDIA
RELATIONS OFFICE
CASSINI IMAGING CENTRAL LABORATORY FOR OPERATIONS (CICLOPS)
SPACE SCIENCE INSTITUTE, BOULDER, COLORADO
http://ciclops.org
Steve
Mullins (720)974-5859
CICLOPS/Space Science Institute, Boulder, Colo.
media@ciclops.org
<mailto:media@ciclops.org>
Preston Dyches (818)-354-7013
Jet Propulsion Laboratory,
ICY
TENDRILS REACHING INTO SATURN RING TRACED TO THEIR SOURCE
Press Release: April 14, 2015
Long, sinuous, tendril-like structures seen in the vicinity of Saturn's icy
moon Enceladus originate directly from geysers erupting from its surface,
according to scientists studying images from NASA's Cassini spacecraft.
This result is published online today in a study in the Astronomical Journal,
along with additional insights into the nature of the structures.
Images and graphics related to this story are available at:
http://ciclops.org/view_event/205.
"We've
been able to show that each unique tendril structure can be reproduced by
particular sets of geysers on the moon's surface," said Colin Mitchell, a
Cassini imaging team associate at the Space Science Institute in Boulder,
Colorado, and lead author of the paper. Mitchell and colleagues used computer
simulations to follow the trajectories of ice grains ejected from individual
geysers. The geysers, which were discovered by Cassini in 2005, are jets of
tiny water ice particles, water vapor and simple organic compounds.
Under
certain lighting conditions, Cassini's wide-view images showing icy material
erupting from Enceladus reveal faint, finger-like features, dubbed
"tendrils" by the imaging team. The tendrils reach into Saturn's E
ring -- the ring in which Enceladus orbits -- extending tens of thousands of
miles (or kilometers) away from the moon. Since the tendrils were discovered,
scientists have thought they were the result of the moon's geysering activity
and the means by which Enceladus supplies material to the E ring. But the
ghostly features had never before been traced directly to geysers on the
surface.
Because
the team was able to show that tendril structures of different shapes
correspond to different sizes of geyser particles, the team was able to zero in
on the sizes of the particles forming them. They found the tendrils are
composed of particles with diameters no smaller than about a hundred thousandth
of an inch, a size consistent with the measurements of E-ring particles made by
other Cassini instruments.
As the researchers examined images from different times and positions around
Saturn, they also found that the detailed appearance of the tendrils changes
over time. "It became clear to us that some features disappeared from one
image to the next," said John Weiss, an imaging team associate at
The authors suspect that changes in the tendrils' appearance likely result from
the cycle of tidal stresses -- squeezing and stretching of the moon as it
orbits Saturn -- and its control of the widths of fractures from which the
geysers erupt. The stronger the tidal stresses raised by Saturn at any point on
the fractures, the wider the fracture opening and the greater the eruption of
material. The authors will investigate in future work whether this theory
explains the tendrils' changing appearance.
There is even more that can be extracted from the images, the scientists say.
"As the supply lanes for Saturn's E ring, the tendrils give us a way to
ascertain how much mass is leaving Enceladus and making its way into Saturn
orbit," said Carolyn Porco, team leader for the imaging experiment and a
coauthor on the paper. "So, another important step is to determine how
much mass is involved, and thus estimate how much longer the moon's sub-surface
ocean may last." An estimate of the lifetime of the ocean is important in
understanding the evolution of Enceladus over long timescales.
Because of its significance to the investigation of possible extraterrestrial
habitable zones, Enceladus is a major target of investigation for the final
years of the Cassini mission. Many observations, including imaging of the plume
and tendril features, and thermal observations of the surface of its south
polar geyser basin, are planned during the next couple of years.
The Cassini-Huygens mission is a cooperative project of NASA, the European
Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory (JPL),
a division of the California Institute of Technology in
For more information visit http://ciclops.org,
http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini.
-end-
¤····Subject: Mars
Received:
Good
evening, all
Attached IR
image from this evening with the Winjupos comparison.
No
significant comment or detail, other than the bright
Best
regards,
http://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2013/150413/CFs13Apr15.jpg
¤····Subject: Jupiter Images
Received:
Hi guys
here are a few runs on Jupiter taken in the good
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Jupiter
Received:
Hi, all
Kindly find
attached image set from this evening.Unfortunately poor seeing conditions
continue.
Best
regards,
¤····Subject: Fw: The Passing of Walter H. Haas
Received:
My friend
and mentor is gone at age 97. Many
years of a great friendship.
Jeff Beish
------------------------------------------------------
From:
Matthew Will
Sent:
To: undisclosed-recipients:
Subject:
The Passing of Walter H. Haas
Passing
of Walter H. Haas
It
is with great sadness that we let you know that we have been informed that
Walter H. Haas, founder and director emeritus of our organization, the Assn of
Lunar & Planetary Observers, passed away this morning,
Walter
was born
He
had been in gradually failing health recently but his mind was still sharp as a
tack.
Many
of us owe an unmeasurable debt of gratitude to Walter for shaping lunar and
planetary astronomy for what is has evolved into today as well as shaping our
own interest in the Solar System and our lives.
Viewing
will be at La Paz - Grahams Funeral Home, in Las Cruces, NM, on Monday, April
13 from 5 - 8 p.m. www.lapaz-grahams.com
Services
will be held at First Presbyterian Church in
Walter's
daughter, Mary Alba, requests that in lieu of flowers, donations be made to
your local hospice and the ALPO.
Personal
comments and photos about Walter for publication in the next ALPO Journal are
welcome. Please send them to ken.poshedly@alpo-astronomy.org
--
Ken Poshedly
Executive
Director, Assn of Lunar & Planetary Observers
Editor
& Publisher, "Journal of the Assn of Lunar & Planetary
Observers"
------------------------------------------------------
Jeff BEISH (
¤····Subject: RE: Jupiter 26 March 2015.
Received:
Hi, all
Not very
happy with the quality of my image, but am submitting for the record. Io is in transit.
There is a dark spot sp inside the BA oval, which shows best in red(dark). Out
of interest, in the IR, it looks like there may be a bright spot sp
inside the BA oval.
Best
regards,
¤····Subject: Mars
Received:
Good
evening, all
Attached IR
image. After quite a while I had a clear late afternoon, and as I was
opening the observatory to allow the scope to cool down for a Jupiter imaging
session a bit later, I could not resist the opportunity to see if I could see
my old friend Mars. I had great difficulty finding the planet as I was slightly
out of focus. However, I eventually managed to see a very faint
"blob" as I swept the area, and was able to focus in.
I have
tried to orientate the image with south at the top. Aurorae Sinus and Mare
Erythraeum fairly prominent, with Niliacus lacus seemingly visible on the
northern limb. Moab/Eden area showing quite brightly on the preceding(left)
limb.
Another new
milestone,with Mars below 4" now.
Best
regards,
http://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2013/150406/CFs06Apr15.jpg
¤····Subject: Jupiter 2015 April 05
Received:
Here’s a
result from the colour ASI120.
Good
conditions. I find I am getting a diagonal streakiness in the sharpened images
from this camera, which I cannot explain. It does not correspond to pixel
columns.
David ARDITTI (Edgware, Middlesex,
the
http://staglaneobservatory.co.uk
¤····Subject: Solar images
31stMarch/1st April 2015
Received:
Hi Guys
Here are a few shots of the nice proms visible on 31st March/1st April, and one
of sunspot AR
Fair seeing
in spite of 50mph wind gusts at ground level from the north, and a 240mph
westerly jet stream !
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Large
regional dust storm activities
Received:
Dear all,
MRO MARCI Weather Report for the week
of 23 March 2015 – 29 March 2015 shows some large scale dust activities：
The comment says
"Active dust lifting south of
http://www.msss.com/msss_images/2015/04/01/
Best Regards,
Reiichi KONNAï (
¤····Subject: Re: March 20th 2015 Total Eclipse - A personal
account...
Received:
Pete,
Thank you for the descriptive and well illustrated account of the cruise ship solar
eclipse tour that you, you wife, Dr. Paul Abel, and friends shared recently.
Through careful planning and some degree of luck was well you were successful
in your endeavor. The images and video of the event are spectacular! I am glad
that you all were able to experience such excitement for one of natures most
beautiful events.
Regards,
Carlos HERNANDEZ (
¤····Subject: March 20th 2015 Total
Eclipse - A personal account...
Received:
Hi All,
Here's my final personal report of eclipse day with some new pics included...
https://nightskydiary.wordpress.com/2015/03/28/eclipse-day-march-20th-2015/
Best regards,
Pete Lawrence (Selsey,
WS, the