Stu, I am so sorry to hear about that. Take care, the ranks of "old"..... "Alte" (old in German)...is getting thin and not being replaced. We can't afford to lose any! Get well.?? Mark
On Saturday, March 22, 2025 at 10:13:48 AM EDT, Stu Beaber via groups.io <wd4sel@...> wrote:
Ian...I was all ready to attend the spring star party when I fell in the concrete driveway and broke my arm this Friday so I won't see you guys this SP. Maybe in October.
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Stu
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Ian...I was all ready to attend the spring star party when I fell in the concrete driveway and broke my arm this Friday so I won't see you guys this SP. Maybe in October.
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Stu
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Re: Big Solar Prominence in H-alpha!
Doing it with the gong image gets it closer to your figure. We are still pretty good for back yard. A quick look in the history seems to say typical can go to 65000. The record is 500000. I wish I had that graduated EP like you have. I once had one but have no idea where it is now. They seem rarer than woodpecker lips.
On Friday, March 21, 2025 at 11:26:15 AM EDT, Roy Diffrient <mail@...> wrote:
Largest for months ¨C it¡¯s curved over back toward the solar disk, about 45K miles tall, 100K miles long. ?See it on Gong too:
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https://gong2.nso.edu/products/tableView/table.php?configFile=configs/hAlpha.cfg
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Re: Big Solar Prominence in H-alpha!
I see it on Gong. Their image is a bit better than mine!
On Friday, March 21, 2025 at 11:26:15 AM EDT, Roy Diffrient <mail@...> wrote:
Largest for months ¨C it¡¯s curved over back toward the solar disk, about 45K miles tall, 100K miles long. ?See it on Gong too:
?
https://gong2.nso.edu/products/tableView/table.php?configFile=configs/hAlpha.cfg
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Re: I estimate 100,000 km in height for the morning's prom.
Maybe someone on Spaceweather.com will weigh in.
On Friday, March 21, 2025 at 12:18:17 PM EDT, Roy Diffrient <mail@...> wrote:
If you can measure a prom to 5 figures your ruler is way better than mine.
On 03/21/2025 11:51 AM EDT Mark Ost <jimcoble2000@...> wrote:
?
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Roy what do you figure? 62,137 miles high. Now that is using a scales superimposed on the sun as a guide but I think I am close.
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Re: I estimate 100,000 km in height for the morning's prom.
Visual estimate but we are actually fairly close considering the tools. Attached is the scale I have. I think you are more accurate with the graduated EP
On Friday, March 21, 2025 at 12:18:17 PM EDT, Roy Diffrient <mail@...> wrote:
If you can measure a prom to 5 figures your ruler is way better than mine.
On 03/21/2025 11:51 AM EDT Mark Ost <jimcoble2000@...> wrote:
?
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Roy what do you figure? 62,137 miles high. Now that is using a scales superimposed on the sun as a guide but I think I am close.
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Re: I estimate 100,000 km in height for the morning's prom.
If you can measure a prom to 5 figures your ruler is way better than mine.
On 03/21/2025 11:51 AM EDT Mark Ost <jimcoble2000@...> wrote:
?
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Roy what do you figure? 62,137 miles high. Now that is using a scales superimposed on the sun as a guide but I think I am close.
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Thanks Kent. That gives me a third way to estimate height. Bearing in mind that photocopies never come out to original scale and computer images may or may not scale. I adjusted the image to fit my graduated guide and used a divider to check the height of the prom against the spread of the divider. I get again get around slightly less that 69,000 miles.
On Friday, March 21, 2025 at 12:02:06 PM EDT, Kent Blackwell via groups.io <kent@...> wrote:
Here is my rather crude attempt to capture the solar prominence with my 20-year-old H-alpha scope. The visual view far exceeds this rather so-so picture. I was trying to balance the telescope with a heavy camera using eyepiece projection with an old Edmund Scientific 25mm eyepiece.
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Here is my rather crude attempt to capture the solar prominence with my 20-year-old H-alpha scope. The visual view far exceeds this rather so-so picture. I was trying to balance the telescope with a heavy camera using eyepiece projection with an old Edmund Scientific 25mm eyepiece.
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We estimate very close in height. I did not do the length.
On Friday, March 21, 2025 at 11:13:44 AM EDT, Roy Diffrient <mail@...> wrote:
The largest I¡¯ve seen in a long time. ?It¡¯s curved back toward the sun, about 70k miles tall and 100k miles long.
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I estimate 100,000 km in height for the morning's prom.
Roy what do you figure? 62,137 miles high. Now that is using a scales superimposed on the sun as a guide but I think I am close.
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Big Solar Prominence in H-alpha!
Largest for months ¨C it¡¯s curved over back toward the solar disk, about 45K miles tall, 100K miles long. ?See it on Gong too:
?
https://gong2.nso.edu/products/tableView/table.php?configFile=configs/hAlpha.cfg
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8" MAG Instruments Portaball
This is up for sale on Cloudy nights:
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Disclaimer, I know nothing about the seller. Just found it interesting to see one up on a listing.
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Jeff T.
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I don't think I'll book a cruise to that one.
On Sunday, March 16, 2025 at 10:32:38 AM EDT, Ian Stewart <ian@...> wrote:
Wonderbar!
On 3/16/2025 10:28 AM, charles jagow
wrote:
The
comparison of the views from the Earth and from the Moon
at the same time of a total lunar eclipse.
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well that's one way of looking at it 
On Sunday, March 16, 2025 at 10:32:38 AM EDT, Ian Stewart <ian@...> wrote:
Wonderbar!
On 3/16/2025 10:28 AM, charles jagow
wrote:
The
comparison of the views from the Earth and from the Moon
at the same time of a total lunar eclipse.
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Wonderbar!
On 3/16/2025 10:28 AM, charles jagow
wrote:
toggle quoted message
Show quoted text
The
comparison of the views from the Earth and from the Moon
at the same time of a total lunar eclipse.
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The comparison of the views from the Earth and from the Moon at the same time of a total lunar eclipse.
? ? ? ?-??-??-? -- v/r
v/r
Chuck Jagow
Future ???????
Gone... ??????
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Lunar Eclipse clouded out
Tonight's scheduled lunar eclipse watch at Bells Mill Park has been CANCELLED due to total cloud cover.
There will be another total eclipse of the Moon next year, on March 3, 2026.
George
George Reynolds
"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA)?
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Re: Binoviewer advice/experiences
Sure. All my pairs went long ago.
On Wednesday, March 12, 2025 at 02:34:18 PM EDT, Patrick Vartuli via groups.io <pvartuli@...> wrote:
Thanks Mark.? I know someone (Kent) that has the same eyepieces I have and will see if he will join in for the test.
On Wed, Mar 12, 2025, 2:29?PM jimcoble2000 via <jimcoble2000= [email protected]> wrote:
I can bring my pair of Denkmeir bino viewers. I will have to find the barlow that goes with them but am pretty sure I? know where it is. I don't have eyepiece pairs though.
On Wednesday, March 12, 2025 at 02:15:41 PM EDT, Patrick Vartuli via <pvartuli= [email protected]> wrote:
That is a great idea.? If anyone is interested in lending a binoviewer at the ECSP.? I would be eternally grateful. On Wed, Mar 12, 2025 at 2:07?PM jimcoble2000 via <jimcoble2000= [email protected]> wrote:
Might be a good idea to borrow a pair and try before spending money.?
Thanks for the info Mark.? I was looking at the William Optics version but began researching and was trying to understand if it was worth the reach.? I have seen a lot of posts from folks stating the struggles but indicated if you could get the issues
worked out it was worth it.? My ES 20" has an back focus extension on it now and believe it would help with the in focus issue.? However my 12" does not.
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DSO would have to be done with one eyepiece but planetary and lunar might benefit from the binoviewer use.
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The other issue is to what magnification should you go if you choose that route?? I saw that it could become difficult for the average astronomer to combine the images (visually) over 150x magnification.
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Thanks again for your insights.??
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Kind regards,
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Patrick
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Re: Binoviewer advice/experiences
Thanks Mark.? I know someone (Kent) that has the same eyepieces I have and will see if he will join in for the test.
On Wed, Mar 12, 2025, 2:29?PM jimcoble2000 via <jimcoble2000= [email protected]> wrote:
I can bring my pair of Denkmeir bino viewers. I will have to find the barlow that goes with them but am pretty sure I? know where it is. I don't have eyepiece pairs though.
On Wednesday, March 12, 2025 at 02:15:41 PM EDT, Patrick Vartuli via <pvartuli= [email protected]> wrote:
That is a great idea.? If anyone is interested in lending a binoviewer at the ECSP.? I would be eternally grateful. On Wed, Mar 12, 2025 at 2:07?PM jimcoble2000 via <jimcoble2000= [email protected]> wrote:
Might be a good idea to borrow a pair and try before spending money.?
Thanks for the info Mark.? I was looking at the William Optics version but began researching and was trying to understand if it was worth the reach.? I have seen a lot of posts from folks stating the struggles but indicated if you could get the issues
worked out it was worth it.? My ES 20" has an back focus extension on it now and believe it would help with the in focus issue.? However my 12" does not.
?
DSO would have to be done with one eyepiece but planetary and lunar might benefit from the binoviewer use.
?
The other issue is to what magnification should you go if you choose that route?? I saw that it could become difficult for the average astronomer to combine the images (visually) over 150x magnification.
?
Thanks again for your insights.??
?
Kind regards,
?
Patrick
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Kent Blackwell
charles jagow