Re: Plato crater views.
From: stevecreasey3@PROTECTED
Hi Trevor, Merry Christmas! Nice write up of your lunar observations.I too was out on the 24th (in the relative comfort of the observatory) with my own moon project. I decided to image some areas of the moon with the 8RC and asi120mc, this then turned into imaging the whole of the moon.Obviously with this combination of camera and scope the field of view is very small, so I ended up making 24 x 2minute videos, overlapping to hopefully make merging easier.It has turned out to be a bigger task than I had initially thought, batch processing in PIPP, align, stack and sharpen in Registax, save as a new file format in PS, another edit in Lightroom and hopefully merge in Lightroom or PS.I may crop them to remove overlapping and have them individually printed on metal or canvas to make a wall mosaic.Any sign of some lengthy clear weather? Starting to get fed up with this wind and rain!Kind regardsSteveSent from my iPhoneOn 26 Dec 2020, at 20:11, trevorwilliampitt@PROTECTED trevorwilliampitt@PROTECTED [Abingdon Astronomical Society Mailing List] <aasmail@PROTECTED> wrote:
From: trevorwilliampitt@PROTECTED
The evening of 24th December I was on the hunt for Santa crossing the Tier 4 skies with the big Dobsonian and happened on the rather bright Moon. Actually it was planned as it was an opportune time to actually see anything other than the underside of cloud and with a crisp clear northerly flow to help with transparency with RH below 80% for the first time in a while.
I was keen to see how many craterlets were visible on the floor of the crater and to see what I could make of the streaks that were well reported by selenographers such as TGE Elger and H Platt ( an article by Nigel Longshaw in December’s Astronomy Now helped) with the streaks shown on Elger’s drawing below.
<image002.jpg>To start with, a nice view of the Vallis Alpes was had at 250x with the centre rille clearly visible along with several craters along the length. I could trace the rille on and off down the whole length of the valley. Obviously not as good as the LRO image (below) , but the shadows were better defined in my view.
<image006.jpg>I did up the EP strength to 6 mm giving 416x, but the views were not as clear with the seeing a bit less than satisfactory at this magnification ( could also have been the mirror needed a bit longer to cool) though the strong Northerly wind was chilling me very effectively.
Onto Plato and initially nothing much seen in the crater floor at 416x so dropped back to 250x. Once the glare had been overcome ( I could not find my 1.25 inch ND filter) I then started to pick up more detail. The largest of the craterlets measures only 2.44km across and this central one was first to be seen (A) , followed by one half way to the wall to the SW (B), 2.1km . Finally an elongated crater half way to the northern wall was also visible (C 2.22km /D 1.98 km). I could see two at times, but it was as good a view as I was going to get under these conditions.
<image008.jpg>As for the markings, these were not initially visible, but I added a red filter to aid viewing and then could see some of these streaks. Once noticed they became more obvious though the push to Dobsonian, frozen fingers and the wind prevented making a sketch at the top of the ladder. I can confirm that I could not see all the streaks as well as the top sketch shows. The last image is from LRO and I stretched it a little to bring out some details and squashed it. The horizontal lines are joints between passes. This does show some of the markings / streaks, but the structure is nothing like the early sketches.
<image010.png>As for timing – the 100 degree AFOV EPs do allow a generous 60 seconds viewing without moving the scope so there would be time to make a sketch of essential details, but not at 5 deg C and a strong wind blowing ( in my case), I’ll revisit it in the spring.
Hope you all had a good Christmas.
Trevor
Abingdon Astronomical Society Mailing List
Post to: Abingdon Astronomical Society Mailing List ( aasmail@PROTECTED )
Manage Your Subscription
Unsubscribe
Abingdon Astronomical Society Mailing List
Post to: Abingdon Astronomical Society Mailing List ( aasmail@PROTECTED )
Manage Your Subscription
Unsubscribe 
- This mailing list is a public mailing list - anyone may join or leave, at any time.
- This mailing list is a group discussion list (unmoderated)
-
Start a new thread, email:
aasmail@abingdonastro.org.uk
This mailing list requires approval from the List Owner, before subscriptions are finalized.
This mailing list is for email discussions of astronomical topics and the exchange of messages, notices of meetings and events organised by Abingdon Astronomical Society and others, and astronomical news between members of Abingdon Astronomical Society.
Privacy Policy:
AAS Privacy Policy, Issue 0.2, 27/10/2019
What personal data does Abingdon Astronomical Society (AAS) collect? The data we routinely collect includes members’ names, addresses, telephone numbers and email addresses. We also collect the names and some contact information for visitors to meetings that are prospective members. We collect these data directly from our members when they join the club or are prospective members attending their first meeting.
For some of our members we may have additional information such as committee memberships. For all members we maintain data on whether they have paid their AAS subscription.
How does AAS use these data? We use members’ data for the administration of your membership and communicating with members of concerning membership and our events.
Do we share your data with other organisations? AAS does not share your data with any other organisations.
If you register with aaslist email mailing list, the data you share with the list will be subject to this privacy policy. Membership of aaslist is optional and provides email discussions of astronomical topics and notices of meetings and events organised by AAS and others. When you apply to join the aaslist mailing list your email address is supplied to the administrators of the list, who are members of the AAS Committee.
How do we collect your data? Data are collected from members when they join AAS and complete our subscription form. Data are collected from visitors when they enter their first meeting. Email addresses are also received via applications to join the aaslist list; although, in many cases, members will already have supplied this on joining AAS.
How is your data stored? Completed subscription forms are stored securely in the private homes of the AAS Treasurer and/or Secretary.
Members’ data in electronic form are stored on the personal computers of the AAS Treasurer and Secretary, which have Internet security and anti-virus measures in place. No data are stored remotely except the data provided to the optional aaslist mailing list, which is stored on the UK servers of fasthosts.co.uk and subject to their GDPR policy.
Who takes responsibility for ensuring data protection compliance? We do not have a statutory requirement under the GDPR (General Data Protection Regulations) to have a Data Protection Officer. The Committee of AAS is the Data Controller. The person who is responsible for ensuring that AAS discharges its GDPR responsibilities is the AAS Secretary.
Fasthosts.co.uk is a Data Processor of email addresses of AAS members and others who choose to join the optional aaslist email mailing list.
Who has access to your data? Committee members of AAS have access to members’ data in order for them to carry out their legitimate tasks for the AAS.
What is the legal basis for collecting these data? AAS collects data from members and prospective members that are necessary for the purposes of its legitimate interests as a membership organisation.
How can people check what data AAS holds about them? If you would like to see the name and contact data which AAS holds, you should contact the AAS Secretary.
You can contact us with a ‘subject access request’ if you would like us to provide you with any other information we hold about you. If you are interested in any particular aspects, specifying them will help us to provide you with what you need quickly and efficiently. We are required to provide this to you within one month.
There is not usually a fee for this, though we can charge a reasonable fee based on the administrative cost of providing the information if a request is manifestly unfounded or excessive, or for requests for further copies of the same information.
Does AAS collect any sensitive personal data? The GDPR uses the term “special categories of personal data” to indicate sensitive personal data. AAS does not record any such data.
Can you ask AAS to remove, limit or correct the data held about you? You could maintain your club membership with your correct name but with limited contact details. AAS needs to have at least one method of contacting you. You could for example simply maintain an up-to-date email address.
Alternatively, providing you supply your correct name, you can attend AAS meetings as a returning visitors and pay the returning visitor meeting charges.
If you find some aspect of the data AAS holds about you to be incorrect, please contact the AAS Secretary in person or in writing and ask for the data to be amended.
How long does AAS keep your data for and for what purpose? AAS keeps members’ data after their membership subscription runs out in case they wish to rejoin. However, we will delete any contact data for former members at their request or, in any case, after four years of lapsed membership.
What happens if a member dies? Once we have been told of the death of a member or recently lapsed member, by a relative or estate executor, we will delete the contact data we hold for them.
Where can members see this Privacy Policy? The AAS Privacy Policy will be shown on the AAS website. Paper copies can be provided by the AAS Secretary.
Chris Holt, Secretary, Abingdon Astronomical Society Date:
