10 sunspots on 5 Jan 2023, Royal Observatory of Belgium counted: 47...

A

a a

Guest
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
 
On 06/01/2023 02:56, a a wrote:
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Belgium counted 47 spots
and calculated Wolf number to be: 107
Click to expand...

In the mean time everyone ignored the Wolf number and used the 10 cm
flux reading instead.

--
Brian Gregory (in England).
 
On 06/01/2023 02:56, a a wrote:
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Belgium counted 47 spots
and calculated Wolf number to be: 107
Click to expand...

In the mean time everyone ignored the Wolf number and used the 10 cm
flux reading instead.

--
Brian Gregory (in England).
 
On 06/01/2023 02:56, a a wrote:
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Belgium counted 47 spots
and calculated Wolf number to be: 107
Click to expand...

In the mean time everyone ignored the Wolf number and used the 10 cm
flux reading instead.

--
Brian Gregory (in England).
 
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Click to expand...

Don\'t worry. Not making that mistake again.
Plonk!

--
Brian Gregory (in England).
 
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Click to expand...

Don\'t worry. Not making that mistake again.
Plonk!

--
Brian Gregory (in England).
 
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Click to expand...

Don\'t worry. Not making that mistake again.
Plonk!

--
Brian Gregory (in England).
 
On Friday, 6 January 2023 at 05:12:37 UTC+1, Brian Gregory wrote:
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Don\'t worry. Not making that mistake again.
Plonk!
--
Brian Gregory (in England).
Click to expand...
thank you
I was not aware Wikipedia redirects: Sunspot number query
to Wolf number

\"
The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the Sun.

Wolf number is Index calculated, based on a real, genuine number of sunspots and number of groups

So the above definition of Wolf number is clearly wrong.

The only real number of sunspots is one counted by sun observer on a daily basis.

Wolf number is Index calculated, not counted
 
On Friday, 6 January 2023 at 05:12:37 UTC+1, Brian Gregory wrote:
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Don\'t worry. Not making that mistake again.
Plonk!
--
Brian Gregory (in England).
Click to expand...
thank you
I was not aware Wikipedia redirects: Sunspot number query
to Wolf number

\"
The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the Sun.

Wolf number is Index calculated, based on a real, genuine number of sunspots and number of groups

So the above definition of Wolf number is clearly wrong.

The only real number of sunspots is one counted by sun observer on a daily basis.

Wolf number is Index calculated, not counted
 
On Friday, 6 January 2023 at 05:12:37 UTC+1, Brian Gregory wrote:
On 06/01/2023 02:55, a a wrote:
Brian Gregory (in England).
don\'t be silly
Don\'t worry. Not making that mistake again.
Plonk!
--
Brian Gregory (in England).
Click to expand...
thank you
I was not aware Wikipedia redirects: Sunspot number query
to Wolf number

\"
The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the Sun.

Wolf number is Index calculated, based on a real, genuine number of sunspots and number of groups

So the above definition of Wolf number is clearly wrong.

The only real number of sunspots is one counted by sun observer on a daily basis.

Wolf number is Index calculated, not counted
 
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
Click to expand...

https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
 
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
Click to expand...

https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
 
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
Click to expand...

https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
don\'t be silly
Click to expand...

spaceweather.com/glossary/sunspotnumber.html called: The Sunspot Number \"As a rule of thumb, if you divide either of the official sunspot numbers by 15, you\'ll get the approximate number of individual sunspots visible on the solar disk if you look at the Sun by projecting its image on a paper plate with a small telescope.
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
don\'t be silly
Click to expand...

spaceweather.com/glossary/sunspotnumber.html called: The Sunspot Number \"As a rule of thumb, if you divide either of the official sunspot numbers by 15, you\'ll get the approximate number of individual sunspots visible on the solar disk if you look at the Sun by projecting its image on a paper plate with a small telescope.
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
don\'t be silly
Click to expand...

spaceweather.com/glossary/sunspotnumber.html called: The Sunspot Number \"As a rule of thumb, if you divide either of the official sunspot numbers by 15, you\'ll get the approximate number of individual sunspots visible on the solar disk if you look at the Sun by projecting its image on a paper plate with a small telescope.
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Click to expand...
Belgium counted 47 spots
and calculated Wolf number to be: 107
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Click to expand...
Belgium counted 47 spots
and calculated Wolf number to be: 107
 
On Friday, 6 January 2023 at 03:23:35 UTC+1, Brian Gregory wrote:
On 06/01/2023 00:47, a a wrote:
Can you check either 10 or 47 against images from satellite telescope ?


(black spots only)


https://spaceweather.com/images2023/05jan23/hmi1898.gif

https://spaceweather.com/images2023/05jan23/hmi4096_blank.jpg

---

https://www.sidc.be/uset/data/cameras/output_img/png/L1c_png_2048_text/USET_White_Light/2023/01/UPH20230105100245.png

https://www.sidc.be/uset/data/drawings/2023/01/usd202301051000.jpg
https://en.wikipedia.org/w/index.php?title=Sunspot_number

--
Brian Gregory (in England).
Click to expand...
Belgium counted 47 spots
and calculated Wolf number to be: 107
 
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