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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 1344 matches

by highfnum
Wed Nov 27, 2019 9:23 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

caK processed 4 line skip
which do you think is better ?
fc2_save_2019-11-26-120521-0000cak_0074skip.jpg
fc2_save_2019-11-26-120521-0000cak_0074skip.jpg (118.98 KiB) Viewed 351 times
by highfnum
Tue Nov 26, 2019 7:38 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

11/26
quiet but a few proms here and there
fc2_save_2019-11-26-120521-0000cak_000.jpg
fc2_save_2019-11-26-120521-0000cak_000.jpg (113.82 KiB) Viewed 811 times
fc2_save_2019-11-26-120927-0000cah_000.jpg
fc2_save_2019-11-26-120927-0000cah_000.jpg (111.98 KiB) Viewed 811 times
by highfnum
Sun Nov 17, 2019 3:58 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Minor geomagnetic storm
Replies: 6
Views: 269

Re: Minor geomagnetic storm

all back to normal
"rain , rain go away come back again in another day"
by highfnum
Sat Nov 16, 2019 4:58 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

mark I use this website that shows magnetic sun

https://tesis.lebedev.ru/en/sun_pictures.html
by highfnum
Fri Nov 15, 2019 6:32 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

Nov 15
2 cak's and a 1 cah
fc2_save_2019-11-15-120049-0000cak_000k.jpg
fc2_save_2019-11-15-120049-0000cak_000k.jpg (109.69 KiB) Viewed 936 times
fc2_save_2019-11-15-115713-0000cak_000.jpg
fc2_save_2019-11-15-115713-0000cak_000.jpg (111.1 KiB) Viewed 936 times
cah
fc2_save_2019-11-15-115235-0000cah_000.jpg
fc2_save_2019-11-15-115235-0000cah_000.jpg (99.9 KiB) Viewed 936 times
by highfnum
Thu Nov 14, 2019 11:02 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: large spectroheliograph - India
Replies: 10
Views: 389

Re: large spectroheliograph - India

oops! feb 22 1926
by highfnum
Thu Nov 14, 2019 4:15 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: large spectroheliograph - India
Replies: 10
Views: 389

Re: large spectroheliograph - India

with a little computer magic
kodaikanalcak1c.jpg
kodaikanalcak1c.jpg (88.11 KiB) Viewed 244 times
by highfnum
Thu Nov 14, 2019 4:13 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: large spectroheliograph - India
Replies: 10
Views: 389

Re: large spectroheliograph - India

well shopped around the antique sites
picked up a glass 1922 photo from kodaikanal
cak
kodaidescrp.jpg
kodaidescrp.jpg (89.27 KiB) Viewed 245 times
kodaikanalcak1.jpg
kodaikanalcak1.jpg (108.24 KiB) Viewed 245 times
by highfnum
Thu Nov 14, 2019 1:20 pm
Forum: This is SolarChat !!
Topic: Sol del 9 de noviembre 2019.
Replies: 5
Views: 187

Re: Sol del 9 de noviembre 2019.

fine detail
by highfnum
Thu Nov 14, 2019 1:18 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Magnetometer Back Online
Replies: 6
Views: 194

Re: Magnetometer Back Online

Stu: what info told you were water logged?
by highfnum
Thu Nov 14, 2019 1:17 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Magnetometer Back Online
Replies: 6
Views: 194

Re: Magnetometer Back Online

almost exact
by highfnum
Wed Nov 13, 2019 11:32 am
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

here is a fun one
60mm unitron ND5 filter S8 phone
12.5 HM eyepiece
not so bad for this hand held method
untrn20191111_121010_resized.jpg
untrn20191111_121010_resized.jpg (107.02 KiB) Viewed 292 times
by highfnum
Tue Nov 12, 2019 8:33 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

Hed3 filter made by Andover optical Mass
its in 10A - 20A bandwidth range
so not same as true narrow band or what i can get
thru spectroheliograph

but still can capture good surface details on sun
when weather conditions allow

its used in conjunction with baadar n3.5 filter
by highfnum
Tue Nov 12, 2019 8:28 pm
Forum: This is SolarChat !!
Topic: Mercury with a dying Quark
Replies: 7
Views: 249

Re: Mercury with a dying Quark

good image
by highfnum
Mon Nov 11, 2019 8:46 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

caK omega apo 66
SMfc2_save_2019-11-11-091202-0000cak.jpg
SMfc2_save_2019-11-11-091202-0000cak.jpg (97.61 KiB) Viewed 390 times
by highfnum
Mon Nov 11, 2019 8:45 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

C5 Hed3 wide band -- clouds started to come in this one
SMfc2_save_2019-11-11-123517-0000c5hed3.jpg
SMfc2_save_2019-11-11-123517-0000c5hed3.jpg (91.18 KiB) Viewed 391 times
by highfnum
Mon Nov 11, 2019 8:44 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

caH wideband omega apo66
SMcahwmer2019.jpg
SMcahwmer2019.jpg (93.12 KiB) Viewed 392 times
by highfnum
Mon Nov 11, 2019 8:43 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

Re: transit Mercury several freq

PST Ha
smhamer2019pst.jpg
smhamer2019pst.jpg (109.39 KiB) Viewed 394 times
by highfnum
Mon Nov 11, 2019 8:42 pm
Forum: This is SolarChat !!
Topic: transit Mercury several freq
Replies: 15
Views: 395

transit Mercury several freq

conditions were below average but good enough to see the show
apo66 quark Mg B2
SMmgqrkmer2019.jpg
SMmgqrkmer2019.jpg (80.21 KiB) Viewed 395 times
by highfnum
Sun Nov 10, 2019 6:54 pm
Forum: This is SolarChat !!
Topic: Old school Solar observation | Clave' Helioscopes
Replies: 13
Views: 672

Re: Old school Solar observation | Clave' Helioscopes

very cool

i have a 6mm clave eyepiece
top notch stuff
by highfnum
Fri Nov 08, 2019 5:00 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: large spectroheliograph - India
Replies: 10
Views: 389

Re: large spectroheliograph - India

Naw!
about 60cm long and 3.18Kg
SHGon102419sm.jpg
SHGon102419sm.jpg (98.57 KiB) Viewed 339 times
by highfnum
Sun Nov 03, 2019 5:12 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

here is quark Mg
they are similar
spots have a bright "ring' around spots
mg2bs.jpg
mg2bs.jpg (115.92 KiB) Viewed 1055 times
by highfnum
Sun Nov 03, 2019 5:06 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG caH cak
Replies: 26
Views: 1608

Re: SHG caH cak

here a few Mg outer inner lines
mgexam.JPG
mgexam.JPG (107.84 KiB) Viewed 1056 times
mginnerlines.jpg
mginnerlines.jpg (105.42 KiB) Viewed 1056 times