AR2365

[allan_dystrupDeltager Nova]

Sjov solplet i dag – med den cirkulære lysbro og flossede penumbra lignede den grangiveligt en lille vulkan ! –

men den kan nu nok bedst sammenlignes med et krater forårsaget af plasma udladninger…

AllanAllan_Dystrup2015-06-12 13:19:27

[outlookDeltager Super Nova]

Hej Allan

Det er søreme en god skitse, du har der. Ret chokerende at tænke på, hvis pletten virkelig var så stor som afbildet på skiven.

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Hilsen Leif,
“When you look through a good apo, your world suddenly gets very quiet. Your breathing gets deep, and you don’t seem to be in any hurry to do anything else…” Ed Ting

[allan_dystrupDeltager Nova]

Ja

Selvom okularets synsfelt var 0.4 grader,

så et det FOV, jeg har medtaget i skitsen,

jo væsentligt mindre ( < 0.1 grad). Burde

jeg jo nok have angivet…

Men det var sjovt at se den udvikle sig !

Allan

[viggo.tDeltager Super Giant]

Smuk tegning og fine noter. Interessant med lysbroen. Ikke helt almindelig at den er så lys synes jeg.

Mvh Viggo.

[allan_dystrupDeltager Nova]

Du har ret Viggo — lysbroen er lidt lysere ift. omgivelserne,

end det kunne ses på solen. Jeg har ikke ramt tonen helt rent,

— men nogenlunde tæt på 🙂

Allan

[jesperkDeltager Asteroid]

Et spørgsmål, når en solplet opstår, hvordan foregår det så med benævnelsen af den?

[allan_dystrupDeltager Nova]

->Solar Physice Q/A<- wrote:

There is no naming or numbering system for sunspots. There is a system for numbering active regions, however. An active region can contain one or more spots.

The National Oceanic and Atmospheric Administration (NOAA) numbers active regions consecutively as they are observed on the Sun. According to David Speich at NOAA, an active region must be observed by two observatories before it is given a number (a region may be numbered before its presence is confirmed by another observatory if a flare is observed to occur in it, however).

The present numbering system started on January 5, 1972, and has been consecutive since then. An example of an active region “name” is “AR5128” (AR for Active Region) or “NOAA Region 5128”. Since we only see active regions when they are on the side of the Sun facing the Earth, and the Sun rotates approximately once every 27 days (the equator rotates faster than the poles), the same active region may be seen more than once (if it lasts long enough). In this case the region will be given a new number. Hence, a long-lived active region may get several numbers.

On June 14, 2002, active region number 10000 was reached. For practical, computational reasons, active region numbers continue to have only four digits. Therefore, the sequence of numbers is 9998, 9999, 0000, 0001, and so on. Active region number 10030, for example, is AR0030. This region will often simply be referred to as region number 30, with 10030 implied.

->The Sun Today<-

Allan

[jesperkDeltager Asteroid]

Jeg takker for info.

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