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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!
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 556 matches
- Tue Nov 05, 2019 10:13 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: lunt 50mm bf400
- Replies: 1
- Views: 585
Re: lunt 50mm bf400
REDUCE PRICE 820€
- Sun Nov 03, 2019 5:29 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Help coronado bf10??
- Replies: 1
- Views: 557
Re: Help coronado bf10??
definitelly not an original diagonal and itf (IR cut filer) is missing.
Should not be use like this!
Should not be use like this!
- Thu Oct 17, 2019 9:34 am
- Forum: Solar Astronomy Shop and Swap
- Topic: lunt 50mm bf400
- Replies: 1
- Views: 585
lunt 50mm bf400
For sale a lunt 50mm bf400 in perfect condition
price 850€
price 850€
- Sun Sep 08, 2019 4:35 pm
- Forum: SPoD Archive
- Topic: Prom Animation 25th August '19_Colour Added
- Replies: 22
- Views: 1008
- Tue Aug 20, 2019 8:44 pm
- Forum: Solar Scope Modifications
- Topic: Blocking Filter In a Collimated Beam?
- Replies: 10
- Views: 810
Re: Blocking Filter In a Collimated Beam?
I recently stack a coronado bf15 with a Lunt bf400:
Picture was very very dark
Picture was very very dark
- Mon Jun 24, 2019 11:41 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: A 19th century PST
- Replies: 5
- Views: 512
Re: A 19th century PST
Nice!
Can you describe how you manage it?
Can you describe how you manage it?
- Thu Jun 06, 2019 5:45 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: Ha Quark Daystar + Tecnosky 152 scope + D-ERF
- Replies: 1
- Views: 833
Ha Quark Daystar + Tecnosky 152 scope + D-ERF
For sale my Ha setup Includes: - technosky 152/900 (http://shop.tecnosky.it/Articolo.asp?SessionID=0F3F4F34-83EA-4D62-9F12-20B2EA9603F&GetInfo=TKacro152&AddScore=TKacro152&Score=1) same as TS : excellent scope in the red -D-ERF 75mm with internal adapter -Quark chromosphere with USB cable -Geoptik b...
- Sat Apr 27, 2019 4:46 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: Baader 1.25” continuum filter
- Replies: 1
- Views: 667
- Thu Mar 28, 2019 6:34 pm
- Forum: SPoD Archive
- Topic: ladies and gentleman the ultimate animation of March 24
- Replies: 11
- Views: 945
Re: ladies and gentleman the ultimate animation of March 24
superbe!!!!
et dire que c'est mon ancien PST....
et dire que c'est mon ancien PST....
- Mon Mar 18, 2019 12:50 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: Baader 1.25” continuum filter
- Replies: 1
- Views: 667
Baader 1.25” continuum filter
For sale a Baader 1.25” continuum filter
Price 45€ includes shipment
Price 45€ includes shipment
- Mon Mar 18, 2019 8:38 am
- Forum: Solar Scope Modifications
- Topic: My ITF is not in the usual place
- Replies: 13
- Views: 1033
Re: My ITF is not in the usual place
Luckily it’s a valery erf that block most wavelengths. A baader one would have gave you a greenish sun as FP and BF doesn’t block all of them
- Wed Jan 16, 2019 6:41 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: for sale 2"pst adapter
- Replies: 1
- Views: 587
- Wed Jan 16, 2019 6:40 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: MFor sale : AK 180/2700
- Replies: 0
- Views: 699
MFor sale : AK 180/2700
For sale in excellent condition a skywatcher black diamond MAK 180/2700.
It includes:
8x50 finder scope
28mm eyepiece
bag
astrosolar filter
price 700€ + shipment
It includes:
8x50 finder scope
28mm eyepiece
bag
astrosolar filter
price 700€ + shipment
- Sun Jan 13, 2019 7:32 pm
- Forum: Solar Astronomy Shop and Swap
- Topic: for sale 2"pst adapter
- Replies: 1
- Views: 587
for sale 2"pst adapter
for sale 2"pst adapter
35€
35€
- Thu Sep 27, 2018 10:52 am
- Forum: This is SolarChat !!
- Topic: High resolution images taken on Aug 20, 21&23th with the 300 mm solar telescope
- Replies: 11
- Views: 1050
- Thu Sep 27, 2018 10:52 am
- Forum: SPoD Archive
- Topic: High resolution images taken on Aug 20, 21&23th with the 300 mm solar telescope
- Replies: 8
- Views: 889
- Sun Jul 15, 2018 1:02 pm
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Recent Digital SHG
- Replies: 12
- Views: 1831
Re: Recent Digital SHG
Waouhhhh
Fantastic result!
Fantastic result!
- Sun Jul 15, 2018 11:36 am
- Forum: This is SolarChat !!
- Topic: 13/07/18 Ha sun
- Replies: 8
- Views: 765
- Sun Jul 15, 2018 11:35 am
- Forum: This is SolarChat !!
- Topic: July 12 - More Ha
- Replies: 12
- Views: 1065
Re: July 12 - More Ha
Lasts 3 are indeed best ones!
- Sun Jul 15, 2018 11:34 am
- Forum: This is SolarChat !!
- Topic: 15th July AR Tal/PST mod
- Replies: 6
- Views: 652
Re: 15th July AR Tal/PST mod
Crispy picture!
- Sat Jul 14, 2018 4:33 pm
- Forum: This is SolarChat !!
- Topic: 13/07/18 Ha sun
- Replies: 8
- Views: 765
13/07/18 Ha sun
Finally I found some minutes to use my 152mm lunt 50 mod scope!
Sky was not so great, but lot of activity!
Sky was not so great, but lot of activity!
- Sat Jul 14, 2018 9:45 am
- Forum: This is SolarChat !!
- Topic: Sun from 30th June and Noctilucent clouds
- Replies: 17
- Views: 1442
Re: Sun from 30th June and Noctilucent clouds
great clouds! I would love to see similar ones!
- Sat Jul 14, 2018 9:44 am
- Forum: This is SolarChat !!
- Topic: Partial solar eclipse 13 July
- Replies: 10
- Views: 1011
Re: Partial solar eclipse 13 July
you made it!
- Sat Jul 14, 2018 9:42 am
- Forum: This is SolarChat !!
- Topic: Partial Solar Eclipse from Hobart
- Replies: 14
- Views: 1303
Re: Partial Solar Eclipse from Hobart
great shot!
- Fri Jun 29, 2018 3:09 pm
- Forum: Solar Scope Modifications
- Topic: lunt 50 mod
- Replies: 35
- Views: 7824
Re: lunt 50 mod
Hi, new to the forum and solar imaging! I’ve got Lunt LS50THA with B600. Just checking I understand this thread, if I had a 152mm refractor then it is possible to remove the objective and tube from LS50, screw directly into the refractor focuser, install an ERF, and then I’m good to go? Or would th...