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  トピック: Differential Ablation
Bill W

返信: 10
表示: 5108

記事フォーラム: UFOCapture BBS in English   日時: Thu Feb 06, 2020 6:41 am   件名: Differential Ablation
Hi All,

Caught this very interesting disintegrating meteor last night. Seems to break up, then the cloud of debris brightens very slightly before fading away behind faster moving material.

Cheer ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Tue Nov 12, 2019 8:01 am   件名: Fireball Spectrum
Hi,
Another week another fireball...!

Was reviewing my results from last week when I discovered I had captured another good spectrum.

At least I know what I'm looking at this time!

Appears t ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Fri Nov 08, 2019 5:39 pm   件名: Fireball Spectrum
Hi,

I have to concede defeat! Can't make any sense of this one at all.
So it's #2 in my "UM" files!

cheers,
Bill.

Shocked Sad
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Tue Oct 29, 2019 6:36 pm   件名: Fireball Spectrum
Hi Koji,

Can you post a graph or a picture with the Fe lines you have identified?

The NIST database has well over 2000 lines in the 350-450nm range. I can only get some to match then others don' ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Thu Oct 24, 2019 7:33 pm   件名: Fireball Spectrum
Hi,
I have found it impossible, so far, to identify any lines with confidence.
It certainly doesn't look like a normal meteor.
I found some spectra of the Hyabusa 1 re-entry and there are some sim ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Mon Oct 21, 2019 8:29 am   件名: Fireball Spectrum
Hi All,
Captured this amazing fireball spectrum a few hours ago!

Using a 35m f1.2 lens on one of my ZWO 174mm cameras using the cheap plastic film grating!

This one will take some time to decip ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Mon Sep 16, 2019 10:47 pm   件名: Fireball Spectrum
Hi TS

That is a large number of spectra you have observed, well done!

Another thing I have found with the inexpensive plastic grating material is that it is a lot more transparent than the much ...
  トピック: 自動観測によるスペクトル観測と結果20180824
Bill W

返信: 2
表示: 612

記事フォーラム: 流星談話室 (Meteors)   日時: Wed Sep 04, 2019 4:21 am   件名: 自動観測によるスペクトル観測と結果20180824
Hi,
Although I don't understand the text the graphs are universal!
Is there a webpage about the meeting?
I've been to Japan once and I'd love to come back someday.
Cheers,
Bill.
Very Happy
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Tue Sep 03, 2019 5:51 pm   件名: Fireball Spectrum
Hi TS,

The results look great but what is interesting is what I call the "blue deficiency" problem.
I've noticed this in MANY spectra, including a LOT of my own. It is a curious phenomena.

I ha ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Sat Aug 24, 2019 4:12 am   件名: Fireball Spectrum
Hi Koji,

Yes!, I am very pleased with the results. The lens I use is a Computar 25mm f1.3 that I found on ebay.

As for numbers I only have captured 2 spectra since I bought the ZWO camera! (I've ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Thu Aug 22, 2019 4:54 pm   件名: Fireball Spectrum
Hi,

With a bit of re-orientation, here's how the new hi res spectrum fits into the overall wavelength span on an older low res spectrum.

Cheers,
Bill. Shocked Very Happy
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Sun Aug 18, 2019 3:05 am   件名: Fireball Spectrum
Hi All,

Reworked one of the sections to investigate the pair of lines that runs very close to the bottom of the image.

Turns out that this "pair" is actually the partially resolved mg triplet ar ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Wed Aug 14, 2019 12:03 am   件名: Fireball Spectrum
Hi,

I'm very impressed with the plastic film grating! It's "efficiency" is not high but the results speak for themselves!

Here are a couple of graphs extracted from the image.

The first is ta ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Tue Aug 13, 2019 1:05 pm   件名: Fireball Spectrum
HI all,

The Perseids have given me another great result...!

Although it's only a partial spectrum it is of the near UV/deep blue where many of the metals have very strong emissions.

This is b ...
  トピック: Fireball Spectrum
Bill W

返信: 255
表示: 112688

記事フォーラム: UFOCapture BBS in English   日時: Wed Feb 13, 2019 5:59 am   件名: Fireball Spectrum
Hi,

The mineralogical results look great.

Yes, the camera seems to have several operational quirks but I will make more observations and monitor how it behaves.

I have several friends I work ...
 
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