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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

Merry Christmas, Happy New Year and looking forward to a great solar cycle 25!

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 793 matches

by MjrTom
Sun Jul 20, 2014 4:08 pm
Forum: This is SolarChat !!
Topic: Back in the fold.
Replies: 14
Views: 562

Re: Back in the fold.

Thanks guys :)

Getting back into the swing of things slowly ;)
by MjrTom
Wed Jul 09, 2014 5:08 pm
Forum: This is SolarChat !!
Topic: Back in the fold.
Replies: 14
Views: 562

Re: Back in the fold.

Thanks Stu,

I dusted off the PST mod and captured a few frames today.
Solar0007 14-07-09 13-49-08_g3_b3_ap698.jpg
1000mm FL
AS_f50_Multi_Solar0008 14-07-09 13-50-21_g3_b3_ap327.jpg
1600mm FL
by MjrTom
Wed Jul 09, 2014 12:36 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Baader wedge - suitable scope.
Replies: 9
Views: 1453

Re: Baader wedge - suitable scope.

I used the Baader wedge with a Skywatcher Equinox 80ED and 100ED and they both work very well. There was very little in the way of lateral chromatic aberration (LCA) The 100mm aperture did show quite a bit more resolution than the 80mm however the scope was over double the weight therefore far less ...
by MjrTom
Tue Jul 08, 2014 8:58 pm
Forum: Solar Astronomy Shop and Swap
Topic: Quark for sale
Replies: 15
Views: 2664

Re: Quark for sale

Thanks Walter :) Let me know if/when it is available and email me a price if you don't want to say publicly :cool: Been looking to get the chromosphere quark for use with my Tak. After seeing the performance of the quarks at the International astronomy show with Mark Townley and Gary Palmer I have b...
by MjrTom
Tue Jul 08, 2014 8:52 pm
Forum: This is SolarChat !!
Topic: Back in the fold.
Replies: 14
Views: 562

Re: Back in the fold.

Thanks guys :)

@Telescopemaker: Yes I agree, been trying to replace the background colour but my photoshop skills are a bit lacking...
by MjrTom
Tue Jul 08, 2014 4:26 pm
Forum: Solar Astronomy Shop and Swap
Topic: Quark for sale
Replies: 15
Views: 2664

Re: Quark for sale

Hello Walter.
Have you now parted with it?
by MjrTom
Tue Jul 08, 2014 3:49 pm
Forum: This is SolarChat !!
Topic: Back in the fold.
Replies: 14
Views: 562

Back in the fold.

Hello all, After a hiatus from much solar astronomy due to various factors I have decided to restart my interest in all things solar. This week I dug out the solar kit and gingerly tried my hand at some solar imaging, 9 months since the camera has been put to good use.... I look forward to rejoining...
by MjrTom
Mon Oct 28, 2013 10:50 am
Forum: This is SolarChat !!
Topic: THE ANNUAL FUNDRAISING RAFFLE FOR THE LUNT LS60THa/PT/B1200 HAS BEGUN!!!
Replies: 29
Views: 742

Re: THE ANNUAL FUNDRAISING RAFFLE FOR THE LUNT LS60THa/PT/B1200 HAS BEGUN!!!

Hey Stephen,

I shall also be making my donation in a couple of weeks when I get paid ;)

Honourable cause!

Mark
by MjrTom
Thu Sep 19, 2013 1:57 am
Forum: This is SolarChat !!
Topic: Solarscope DSF-100 testing
Replies: 87
Views: 2885

Re: Solarscope DSF-100 testing

This has been a great insight into the technical aspects of the filter system.

Thanks guys!

Mark
by MjrTom
Wed Sep 18, 2013 5:48 am
Forum: This is SolarChat !!
Topic: Solarscope DSF-100 testing
Replies: 87
Views: 2885

Re: Solarscope DSF-100 testing

Hi Alexandra.
Is there any visible/mechanical differences between the two SF100 etalons apart from the housing colour?

Thanks

Mark
by MjrTom
Tue Sep 17, 2013 10:10 pm
Forum: This is SolarChat !!
Topic: Double Stacked CaK - Full Disk First Light 16th September
Replies: 21
Views: 887

Re: Double Stacked CaK - Full Disk First Light 16th September

Interesting idea Mark :)
Look forward to seeing more!

Mark
by MjrTom
Tue Sep 17, 2013 8:53 pm
Forum: Solar Astronomy Shop and Swap
Topic: **FOUND** front mounted etalon (40mm-50mm)
Replies: 10
Views: 1416

Re: **Found** front mounted etalon (40mm-50mm)

Hello,

I have secured a second SF50 filter for my Solarscope SV50.

Thanks for the posts

Mark
by MjrTom
Tue Sep 17, 2013 8:39 pm
Forum: This is SolarChat !!
Topic: Solarscope DSF-100 testing
Replies: 87
Views: 2885

Re: Solarscope DSF-100 testing

That is some seriously nice looking kit with great results :) Sorry to hear you are having problems with your blocking filter. I have found ken to be excellent to deal with and very helpful. He offered to repair my SV50 which I bought second hand free of charge after the ERF housing had unscrewed sl...
by MjrTom
Mon Sep 16, 2013 10:23 am
Forum: Solar Astronomy Shop and Swap
Topic: **FOUND** front mounted etalon (40mm-50mm)
Replies: 10
Views: 1416

Re: **Wanted** front mounted etalon (40mm-50mm)

Hi Mark

you'll get an email soon ;-)

Thanks Walter ;)
by MjrTom
Wed Sep 11, 2013 6:49 pm
Forum: This is SolarChat !!
Topic: 09 Sept - Snaking Filaments - 100mm PST
Replies: 20
Views: 632

Re: 09 Sept - Snaking Filaments - 100mm PST

Thanks guys, really appreciate the comments :) Ian, yeah still going to PSP2013 and paid for my ticket this week although my wife is due to give birth to our second child at the end of September so there is a risk I won't be able to make it. More than happy to give you some tips on how to capture an...
by MjrTom
Tue Sep 10, 2013 12:29 am
Forum: This is SolarChat !!
Topic: 09 Sept - Snaking Filaments - 100mm PST
Replies: 20
Views: 632

Re: 09 Sept - Snaking Filaments - 100mm PST

Thanks guys! I think I am slowly getting to grips with the PST mod scope and its characteristics the switch from a helical focuser to a decent Crayford has made the world of difference in nailing the focus. I took the Feathertouch focuser off my 77ED II and with the SCT adapter I have attached it to...
by MjrTom
Mon Sep 09, 2013 7:48 pm
Forum: This is SolarChat !!
Topic: 09 Sept - Snaking Filaments - 100mm PST
Replies: 20
Views: 632

Re: 09 Sept - Snaking Filaments - 100mm PST

Thanks guys!

Chris, yeah I bet the other 9 months of the year make up for it :rockon:

Here you go David ;)



Mark
by MjrTom
Mon Sep 09, 2013 1:59 pm
Forum: This is SolarChat !!
Topic: 09 Sept - Snaking Filaments - 100mm PST
Replies: 20
Views: 632

09 Sept - Snaking Filaments - 100mm PST

Hello All! Clouded out again today... (now that's a surprise!) I managed to find a short break in the clouds long enough to grab a few AVI. Twin snaking Filaments Captured with a 100mm PST stage 2 Mod Telescope. Astro Engineering 1.6x Barlow (f/16) DMK31AU03.AS 100/1000 frames captured and stacked i...
by MjrTom
Sun Sep 08, 2013 5:44 am
Forum: Solar Astronomy Shop and Swap
Topic: **FOUND** front mounted etalon (40mm-50mm)
Replies: 10
Views: 1416

Re: **Wanted** front mounted etalon (40mm-50mm)

Hi Walter,

Sorry just realised that my email address was wrong...

It's Brummymark1 at hotmail.com

Mark
by MjrTom
Fri Sep 06, 2013 3:15 pm
Forum: Solar Astronomy Shop and Swap
Topic: **FOUND** front mounted etalon (40mm-50mm)
Replies: 10
Views: 1416

Re: **Wanted** front mounted etalon (40mm-50mm)

Hi Mark

we could speak about a LS50, mint conditions but expensive ;-)

Hello Walter,

Thanks for replying. :)

I suspect that it might be out of my price range but we can discuss it in more detail.

My email is brummymark at hotmail dot com.

Mark
by MjrTom
Fri Sep 06, 2013 2:52 pm
Forum: This is SolarChat !!
Topic: AR 11836 - PST Mod - 05 Sept 2013
Replies: 6
Views: 535

AR 11836 - PST Mod - 05 Sept 2013

Hello guys! Here is an image I captured yesterday of the Active region AR11836 and surrounding detail. I particularly like the vertical spicule on the limb :) 05 Sept 2013 13:09h UT) 100mm PST Mod @ f/16 DMK 31AU03.AS Astro Engineering 1.6x Barlow 100/1000 frames stacked in ASII and processed in CS6...
by MjrTom
Thu Sep 05, 2013 10:40 am
Forum: This is SolarChat !!
Topic: The Astronomy Centre hosts................. 8th September
Replies: 16
Views: 481

Re: The Astronomy Centre hosts................. 8th September

Cool Telescope :)
I would like to join you all at Todmorden.
I shall see if I can make it ;)
by MjrTom
Thu Sep 05, 2013 7:41 am
Forum: This is SolarChat !!
Topic: Calciums with a 4 inch f/15 setup revealed...
Replies: 19
Views: 362

Re: Calciums with a 4 inch f/15 setup revealed...

These are great Chris!
Looks like a very promising scope to me :)
by MjrTom
Thu Sep 05, 2013 12:39 am
Forum: Solar Scope Modifications
Topic: Advantages of Stage I and Stage II
Replies: 19
Views: 987

Re: Advantages of Stage I and Stage II

If you used both and couldn't see the difference, I'll leave it to others to carry on.

Yeah a huge difference in practice ;)
by MjrTom
Thu Sep 05, 2013 12:19 am
Forum: Solar Astronomy Shop and Swap
Topic: **FOUND** front mounted etalon (40mm-50mm)
Replies: 10
Views: 1416

Re: **Wanted** front mounted etalon (40mm-50mm)

Still on the look out for any smallish front mounted etalons ;)

Thanks

Mark