Solar & Planetary LtE Now for CMO/ISMO #60 (CMO #434)

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¤····Subject: Solar images 20-21-22-April-2015

Received: 30 April 2015 at 06:57 JST


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 UK)
Ham call G4PIE




¤····Subject: Jupiter Images 21-21-23-April-2015

Received: 30 April 2015 at 06:35 JST


HI Guys here are a trio of Jupiters taken over 4 days in decent seeing .




Best wishes


Dave TYLER (Bucks, the UK)
Ham call G4PIE




¤····Subject: solar Images 16-18th-April-2015

Received: 30 April 2015 at 04:24 JST


Hi Guys

Here are two white light shots from the 16th and 4 Ha images from the 18th. The 16ths white light (IR742nm) 11:33ut image is of the same pair as the 18ths 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 UK)
Ham call G4PIE




¤····Subject: Solar Images 14-15th-April-2015

Received: 29 April 2015 at 00:09 JST


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 UK)
Ham call G4PIE




¤····Subject: Re: Don Parker

Received: 28 April 2015 at 04:06 JST


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: 27 April 2015 at 06:50 JST


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 Coronado solarmax 90 ds, Camera ZWO asi120 mm-s .













Best wishes


Dave TYLER (Bucks, the UK)
Ham call G4PIE




¤····Subject: Jupiter 2015.04.21 with Ganymede

Received: 25 April 2015 at 07:18 JST



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:

Infrared animation showing Ganymede movement:

RGB image, almost no details (due to the wind) but the white spot North of NEB preceding the festoon interaction:

Steady skies,


Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: Jupiter 2015.04.20 w/ Io and Europa

Received: 24 April 2015 at 19:23 JST



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:

In methane absorption band:


In blue:

Steadier skies,


Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: jupiter images mid April 2015

Received: 24 April 2015 at 03:47 JST


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 UK as is often the case. The timing of the clear evenings often favoured the appearance of the GRS too.






Best wishes


Dave TYLER (Bucks, the UK)
Ham call G4PIE




¤····Subject: Jupiter 22 April 2015.

Received: 24 April 2015 at 03:30 JST


Hi, all


Kindly find attached additional RGB/IR image set from 22 April with Io and its shadow in transit.





Best regards, Clyde


Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Jupiter 2015 April 22

Received: 23 April 2015 at 10:05 JST


An IR image and an RGB taken during twilight; good seeing.




David ARDITTI (Edgware, Middlesex, the UK)


¤····Subject: Jupiter 2015.04.13 with Io and shadow, and Europa

Received: 23 April 2015 at 07:35 JST



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:

Infrared image:

Methane absorption band image:

Color layers:

And last but not least a short animation in infrared of Io, Io's shadow and Europa moving:

Steady skies,

Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: Jupiter 22 April 2015.

Received: 23 April 2015 at 03:37 JST


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, Clyde



Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Jupiter 20 April 2015.

Received: 21 April 2015 at 03:42 JST


Hi, all


Kindly find attached image set from this evening. Conditions a little better.




Best regards, Clyde


Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Jupiter 2015.04.12 w/ Io and Europa

Received: 20 April 2015 at 20:54 JST


Under very average conditions, Io getting behind Jupiter and with oval BA transiting, and a small reddish spot past CM in NNTZ.

Infrared image:

RGB image:


Methane absorption band image:

Individual layers images:

No impact detected with DeTect on ~35min of videos ( ).

Steady skies,

Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: Solar and Jupiter images April 2015

Received: 17 April 2015 at 16:06 JST


Hi Guys here are a few solar images from the 6th and 8th-April-2015 following the progress of AR 2320 in both Ha and white light. Plus a few proms.

Also in decent seeing are a trio of Jupiter images.














Best wishes


Dave TYLER (Bucks, the UK)
Ham call G4PIE




¤····Subject: Jupiter, Io and Ganymede 2015.04.07

Received: 16 April 2015 at 05:43 JST



Under windy conditions:

No impact detected with DeTeCt on 20 minutes of video

( ).

Steady skies,


Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: Jupiter 2015.04.06, Io and Europa

Received: 16 April 2015 at 04:34 JST



First light of my ASI174MM on Jupiter, under average conditions, and with a focal length a bit short:

GRS is setting, the rift following it is quite extended now.

Steady skies,


Marc DELCROIX (Tournefeuille, FRANCE)




¤····Subject: Latest from Cassini:  Finger-Like Projections from Enceladus Tracedto their Sources

Received: 15 April 2015 at 03:32 JST


April 14, 2015

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 ....

... 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 ocean of Enceladus and making its way into orbit around Saturn.

[Below please find a news release that went out to the public a moment ago.]


Carolyn PORCO (Boulder, CO)
Cassini Imaging Team leader
Director, CICLOPS, Space Science Institute



Steve Mullins (720)974-5859
CICLOPS/Space Science Institute, Boulder, Colo. <>

Preston Dyches (818)-354-7013
Jet Propulsion Laboratory, Pasadena, Calif.


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:

"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 Saint Martin's University in Lacey, Washington, and an author on the paper.

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 Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging team consists of scientists from the U.S., England, France, and Germany. The imaging operations center and team leader (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.

For more information visit,



¤····Subject: Mars 13 April 2015

Received: 14 April 2015 at 02:14 JST



Good evening, all


Attached IR  image from this evening with the Winjupos comparison.

No significant comment or detail, other than the bright Arabian desert region being its normal bright self. I have left orientation as taken.


Best regards, Clyde



Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Jupiter Images 5-Apr-2015

Received: 12 April 2015 at 01:40 JST


Hi guys here are a few runs on Jupiter taken in the good UK seeing of the 5th April .




Best wishes


Dave TYLER (Bucks, the UK)
Ham call G4PIE




¤····Subject: Jupiter 10 April 2015.

Received: 11 April 2015 at 04:56 JST


Hi, all

Kindly find attached image set from this evening.Unfortunately poor seeing conditions continue.




Best regards, Clyde


Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Fw: The Passing of Walter H. Haas

Received: 7 April 2015 at 23:15 JST


My friend and mentor is gone at age 97.  Many years of a great friendship.


Jeff Beish


From: Matthew Will

Sent: Monday, April 06, 2015 11:27 PM

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, April 6, 2015, at 6:10 a.m. MDT (12:00 UT) of natural causes in Las Cruces, New Mexico, his home town for many years.


Walter was born July 3, 1917. He founded the ALPO in 1947 and served as executive director until the 1985.


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.


Services will be held at First Presbyterian Church in Las Cruces, 200 W. Boutz, at 10 a.m., followed by a grave-side service at 11 a.m.


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

Executive Director, Assn of Lunar & Planetary Observers

Editor & Publisher, "Journal of the Assn of Lunar & Planetary Observers"

Atlanta, Georgia USA


Jeff BEISH (Lake Placid, FL)




¤····Subject: RE: Jupiter 26 March 2015.

Received: 7 April 2015 at 13:20 JST


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, Clyde


Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Mars 6 April 2015

Received: 7 April 2015 at 02:08 JST


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, Clyde


Clyde FOSTER (Centurion, SOUTH AFRICA)




¤····Subject: Jupiter 2015 April 05

Received: 6 April 2015 at 08:40 JST


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 UK)


¤····Subject: Solar images 31stMarch/1st April 2015

Received: 5 April 2015 at 01:25 JST


Hi Guys Here are a few shots of the nice proms visible on 31st March/1st April, and one of sunspot AR 2305 in white light.

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 UK)
Ham call G4PIE




 ¤····Subject: Large regional dust storm activities

Received: 1 April 2015 at 11:56 JST


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 Hellas continued during the first few days of the week, contributing suspended particles to a lingering haze that extended across the southern high latitudes. Portions of the high latitude residual haze extended north into Cimmeria and Sirenum, up to around 45 degrees latitude. Multiple frontal dust storms were observed moving south along the Acidalia storms track into Chryse and eastern Valles Marineris. A large regional storm towards the end of the week crossed the equator and expanded into the region extending across Solis, Margaritifer, Aonia, and the Argyre Basin. The pulses of storms in Acidalia and Chryse contributed to thick dust hazes settling in the canyons of Valles Marineris east of Melas Chasma. Localized dust storm were also observed over the course of the week in Amazonis, northwestern Arabia, Deuteronilus, Utopia, near the Elysium Montes, and in Tyrrhena. The increased frequency of dust-lifting events and onset of cross-equatorial activity along the Acidlaia storm-track observed this past week is consistent with the timing noted in previous years. Although global background atmospheric opacities continue to rise with increased storm activity, both rover sites were not directly in the paths of any storms and remain relatively clear and storm-free."

      Best Regards,

Reiichi KONNAï (Fukushima, JAPAN)




¤····Subject: Re: March 20th 2015 Total Eclipse - A personal account...

Received: 1 April 2015 at 07:14 JST



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.


Carlos HERNANDEZ (Miami, FL)




¤····Subject: March 20th 2015 Total Eclipse - A personal account...

Received: 31 March 2015 at 19:27 JST


Hi All,

Here's my final personal report of eclipse day with some new pics included...

Best regards,

Pete Lawrence (Selsey, WS, the UK)


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