Baton Rouge Astronomical Society Forum

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 Post subject: Re: 2015 Solar Viewing
PostPosted: October 1st, 2015, 9:10 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
Yesterday at about 4:15pm I viewed the Sun with a solar viewer. I'm surprised I didn't see AR2422, but I didn't.

Today at about 5pm I used the Sunspotter. I waited too late in the day and had to raise the main section up over the rear lip to get a view. (Oops.) I saw ARs 2422 and 2427 clearly. At that time the SWPC had detected a level 1 radio blackout and predicted a level 1 geomagnetic storm for both tomorrow and Saturday. Try to view the Sun yourself sometime in the next week.

The next public solar viewing time at HRPO is 31 October from 12pm to 2pm.

A recent image from the SDO...
http://sdo.gsfc.nasa.gov/assets/img/latest/latest_1024_HMIIF.jpg


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 Post subject: Re: 2015 Solar Viewing
PostPosted: October 6th, 2015, 8:13 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
I did a little more solar viewing. Friday the 20th at ~5pm, I used the Sunspotter and saw AR 2427 spot on. AR 2422 was very close to the limb. On Saturday the 3rd at ~6pm, I used one of the Orion 6" Dobsonians (with a filter of course); I saw 2427 while clouds were thin and passing rapidly. This morning at ~10am I used a 6" Dob again; AR 2427 was right on the very edge of the solar limb...almost.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: October 13th, 2015, 8:57 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
The 7th and 8th were no good; the clouds wouldn't budge and the Sun was a murky yellow blob. On the 9th at ~4:25pm, still using a 6" Dob, I saw not a sign of any sunspot--in other words, I didn't see AR 2430 at 48x. On the 10th at ~4:35pm I used HRPO's 10" Dob from Orion, and with the extra light-gathering power, I saw AR 2430 with the same magnification of 48x. I even saw what looked like another sunspot very close to the southwest limb. That sunspot wasn't on the daily pic Tony Philip's places on his Spaceweather site, but I found it on one of the latest SDO shots.

I looked with the 10" again on the 11th at ~4:15pm. The second sunspot group then had the designation of 2431. I went up to 96x and even saw the two small sunspots near the large one of 2430. I checked SDO once more and those small ones were visible in the latest flattened intensitygram image.

One may notice a time pattern here. I only go out to view the Sun (in personal life) when the local UV index is "moderate" or "low".


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 Post subject: Re: 2015 Solar Viewing
PostPosted: October 30th, 2015, 5:20 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
Tomorrow is the next-scheduled solar viewing session at HRPO, beginning at 12pm. However, the weather probably will not cooperate.

Here is the current NOAA forecast for that viewing session...
precipitation potential, 96%
sky cover, 100%
relative humidity, 90%
temperature, 24˚C
surface wind, S 18 km/h


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 Post subject: Re: 2015 Solar Viewing
PostPosted: October 31st, 2015, 9:56 am 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
Here is the NOAA forecast for the time of today's planned solar viewing session...
precipitation potential, 94%
sky cover, 100%
relative humidity, 89%
temperature, 25˚C
surface wind, S 16 km/h


There will be no solar viewing today.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: November 18th, 2015, 8:49 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
On 15 October about 4:50pm I used a solar viewer. The Sun was sprinkled with several moderate-sized sunspots and one fairly large (AR2434) near the limb. I saw none of that.

On 16 October about 4:45pm I used the Sunspotter (again raising the back over the lower lip, as the Sun was sinking). AR2434 stood out clearly, but I only looked for a few seconds.

On 17 October about 4:25pm I used the Sunspotter (raising over the lower lip thrice--I really should do this earlier in the day). Too much haze. Did see 2434, though.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: November 25th, 2015, 5:06 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
The next solar viewing session at HRPO is 28 November from 12pm to 2pm. The last solar viewing session will be early in December due to the holidays. Saturday, 12 December from 12pm to 2pm is the time HRPO will provide to hunt for some flare and prominence action.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: November 28th, 2015, 10:10 am 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
Here is the NOAA forecast for the time of today's planned solar viewing session...
precipitation potential, 7%
sky cover, 86%
relative humidity, 63%
temperature, 26˚C
surface wind, SE 14 km/h


Solar viewing will be attempted today. However, there is no guarantee of sharp images.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: December 1st, 2015, 5:28 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
As we await the final HRPO solar viewing session on the 12th, it may be informative to check on some values in the current forecasts and outlooks.As of this posting there are no SWPC alerts for geomagnetic storms or radio blackouts. The current Boulder Sunspot Number is about 35...
http://www.swpc.noaa.gov/products/solar-cycle-progression

Solar activity is lessening, but there is still visual phenomena.


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 Post subject: Re: 2015 Solar Viewing
PostPosted: December 12th, 2015, 11:36 am 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3735
Location: Baton Rouge, LA
Here is the NOAA forecast for the time of today's planned solar viewing session...
precipitation potential, 9%
sky cover, 64%
relative humidity, 61%
temperature, 27˚C
surface wind, SE 23 km/h


Danko predicts that the seeing will be poor; the transparency is too cloudy to forecast. Solar viewing will be attempted.


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