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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 6106 matches

by MapleRidge
Tue Jan 21, 2020 11:59 am
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

Re: January 17th Session

Eric and Salvo...

Thanks for your feed back guys, its always appreciated :bow

Brian
by MapleRidge
Sun Jan 19, 2020 7:06 pm
Forum: This is SolarChat !!
Topic: Ha Full Disk & S6348 - 19th January
Replies: 15
Views: 112

Re: Ha Full Disk & S6348 - 19th January

Hi Mark...

Nice image from today, and looks like the activity I caught on Friday is still going!!!

Our weather is to be clear the next few days, but I am away for work Mon/Tues...go figure :mad:

Brian
by MapleRidge
Sun Jan 19, 2020 6:09 pm
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

Re: January 17th Session

Alexandra and Marty... Thanks for your comments on the images...always appreciated :bow Alexandra, I set up a weather station the first of the new year so I now have the full set of meteorological data compared to the manual temp/rainfall recording I have been keeping for over 20 years. I have been ...
by MapleRidge
Sun Jan 19, 2020 12:53 pm
Forum: This is SolarChat !!
Topic: 19Jan20 - First Light C11+ARIES D-ERF+Quark (Animated GIF Added)
Replies: 18
Views: 257

Re: 19Jan20 - First Light with C11+ARIES D-ERF+Quark

Great first light image Alfred :bow

I hope that you can get more favourable conditions to make the most of the large aperture scope...as cycle 25 builds up there will be lots of targets to show its potential.

Brian
by MapleRidge
Sun Jan 19, 2020 12:50 pm
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

Re: January 17th Session

Rainer, Jochen, Stuart, and Mark... Thanks for your feedback on this session, always appreciated :bow Jochen, the -16C on Thursday isn't a typical winter daytime high...-5 or-6 or more typical. Even that makes most feel cold though ;) The coldest day I ever did any solar imaging was -26C (one day la...
by MapleRidge
Sun Jan 19, 2020 12:07 am
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

Re: January 17th Session

Thanks for your comments on the session Franco...much appreciated :bow Astronomy in the cold, day or night, makes for its challenges but little different than growing up on a farm and having to work in the weather no matter what. I'd loose about 50% of the year if I wait for warm weather and need to...
by MapleRidge
Sat Jan 18, 2020 10:43 pm
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

Re: January 17th Session

Thanks Maurits!!!

Brian
by MapleRidge
Sat Jan 18, 2020 9:25 pm
Forum: This is SolarChat !!
Topic: Sun and sea
Replies: 14
Views: 158

Re: Sun and sea

Lovely pics Alexandra!!!

The combination of monochrome and lighting effects look awesome :bow

Brian
by MapleRidge
Sat Jan 18, 2020 7:53 pm
Forum: This is SolarChat !!
Topic: January 17th Session
Replies: 15
Views: 135

January 17th Session

Hello everyone... After a 2 week stretch of mostly cloudy skies with a few clear days that I couldn't image mixed in, we had a crystal clear sky all day yesterday. The clear skies came at the cost of the coldest "day" of the winter so far, with the thermometer hanging around -16C while I was imaging...
by MapleRidge
Sat Jan 18, 2020 1:35 pm
Forum: This is SolarChat !!
Topic: Full Disc 17 January 2020
Replies: 11
Views: 119

Re: Full Disc 17 January 2020

Great images Rainer!!!

I finally had a clear day yesterday, and some time to image at lunch.

Brian
by MapleRidge
Sat Jan 18, 2020 1:32 pm
Forum: This is SolarChat !!
Topic: Sol from the 15th of January 2020.
Replies: 11
Views: 149

Re: Sol from the 15th of January 2020.

Superb set of images Eric...well done !!!

Brian
by MapleRidge
Sat Jan 18, 2020 1:31 pm
Forum: This is SolarChat !!
Topic: Full Disc 16 January 2020
Replies: 8
Views: 110

Re: Full Disc 16 January 2020

That is still a a great FD image Rainer...well done :bow

Brian
by MapleRidge
Sat Jan 18, 2020 1:30 pm
Forum: This is SolarChat !!
Topic: Full Disk and prominence 15/01/2020
Replies: 12
Views: 162

Re: Full Disk and prominence 15/01/2020

Nice work Salvo :bow

Brian
by MapleRidge
Sat Jan 18, 2020 1:28 pm
Forum: This is SolarChat !!
Topic: Full Disc 15 January 2020
Replies: 10
Views: 122

Re: Full Disc 15 January 2020

Hi Rainer...

You have certainly mastered the full disk mosaics with that scope. Superb image despite the cloud :bow

Brian
by MapleRidge
Sat Jan 18, 2020 1:25 pm
Forum: This is SolarChat !!
Topic: FD and big prominence 18-01-2020
Replies: 9
Views: 111

Re: FD and big prominence 18-01-2020

Great image and presentation Salvo...well done :bow

Brian
by MapleRidge
Tue Jan 14, 2020 12:38 am
Forum: This is SolarChat !!
Topic: Full Disc 13 January 2020
Replies: 9
Views: 122

Re: Full Disc 13 January 2020

Great set of images Rainer...excellent work :bow

Brian
by MapleRidge
Tue Jan 14, 2020 12:34 am
Forum: This is SolarChat !!
Topic: Sun Time lapse over 2h 35m on the old cycle 24 spot
Replies: 6
Views: 94

Re: Sun Time lapse over 2h 35m on the old cycle 24 spot

Great animation Rainer...well done :bow

Brian
by MapleRidge
Mon Jan 13, 2020 6:04 pm
Forum: This is SolarChat !!
Topic: Lucky me ...
Replies: 7
Views: 165

Re: Lucky me ...

Hi Maurits...

You have a very gracious neighbour!!!

Congratulations.

Brian
by MapleRidge
Sun Jan 12, 2020 12:52 pm
Forum: This is SolarChat !!
Topic: Coronado PST testing
Replies: 31
Views: 732

Re: Coronado PST testing

Great news Alexandra ;)

The revised disassembly paid off without aggravating Darren's shoulder!!!

Now I hope you get some sun to test the mod out.

Brian
by MapleRidge
Sun Jan 12, 2020 12:49 pm
Forum: This is SolarChat !!
Topic: Penumbral Eclipse of the MOON (20200110)
Replies: 20
Views: 264

Re: Penumbral Eclipse of the MOON (20200110)

Very nice set of full moon images as well as the hint of the eclipse.

Brian
by MapleRidge
Sun Jan 12, 2020 12:48 pm
Forum: This is SolarChat !!
Topic: Full Disc 11 January 2020
Replies: 14
Views: 446

Re: Full Disc 11 January 2020

Another beautifully detailed FD image Ranier :bow

Brian
by MapleRidge
Sun Jan 12, 2020 12:45 pm
Forum: This is SolarChat !!
Topic: FD and prominence 11/01/2020
Replies: 10
Views: 111

Re: FD and prominence 11/01/2020

Hi Salvo...

Excellent images and the scale markers really demonstrate how big the features are (even though they appear small).

Well done :bow

Brian
by MapleRidge
Sun Jan 12, 2020 12:43 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20200111) | TV101 & LUNT60
Replies: 14
Views: 339

Re: Today's SUN (20200111) | TV101 & LUNT60

Superb FD images Pedro...well done :bow

Funny how the date changed from 2020 in your subject line to the 2010 date in the replies?

Brian
by MapleRidge
Sat Jan 11, 2020 1:21 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Geomagnetic Unrest Jan 2020
Replies: 4
Views: 193

Re: Geomagnetic Unrest Jan 2020

Hi Stuart...

Great review of the events and I've been following the reports on SpaceWeather where your observations have been posted as well.

Always great to see your data as so few have your type of setup to monitor this activity.

Brian
by MapleRidge
Sat Jan 11, 2020 1:14 pm
Forum: This is SolarChat !!
Topic: Full disk (HA) 2020-01-06
Replies: 10
Views: 191

Re: Full disk (HA) 2020-01-06

A nice addition with the limb details Jochen!!!

Brian