Big, bright fast mover (7482) 1994 PC1

[PMSchu]

Hi BMD,

It's not just you. I frequently see the same small font on some things that razvan posts. I don't know why. By clicking on the 'Download' icon I was able to open the document.

Phil S.

[bigmasterdrago]

This rock will burn a hole thru the thin stuff at only 5-6LD! Nice chart Phil!! I brought that rock to the attention of our local clubs just after Christmas. For us here in SE Texas on the evening of January 17th, that large (1 mile) rock from space (1994 PC1) will make a nice pass in the south. The moon is full but 84° from the rock's location. Highest ~8pm at magnitude 9-10 moving at a speed of ~1.3'/min. In just 3 hours the rock tracks 4° as it move out of Fornax into Eridanus. Then again as Phil points out, we get another jab at it high in the south in the early evening of the 18th as we track thru and out of Astronomical twilight, now moving 2'/min. Moon 105° away. Finally, a really big boy. But oh my, January weather!

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Even on the 19th, this big rock is high in the NW moving quickly along the Andromeda/Pegasus border at 11th mag at end of astronomical twilight.

For us near Houston, we get a 4 nighter from this big rock, close pass. I would like to make a broken ephemeris in ST4 but so far have been unable to accomplish that without extreme external editing. I'm unsure why the Quality and Difficulty are listed as they are (blank and undetectable) sometimes. Phil, any help appreciated. The ST4 ephem is from Home 55 miles north of the other (Houston) ephem.


  1994 PC1Ephemeris Home.txt (Size: 2.45 KB / Downloads: 5)


  1994 PC1 Ephemeris.txt (Size: 2.04 KB / Downloads: 8)

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Can I assume that the Difficulty and Quality are the result of being inside Civil Twilight?

[theskyhound]

Hello,

1. What do you mean by "broken ephemeris?"

2. Is it possible that the ---- and undetectable are indications that the object is below your obstructed horizon?

3. How are you obtaining the ephemeris? Is this Copy/Paste or are you printing to a file?

4. Have you seen the Angstrom symbol appear next to the degree symbol before? Are you using a non-US edition of Windows? Is anyone else seeing that?

[bigmasterdrago]

Sorry by broken I mean for a few hours over several day. Not as one continuous set of hours. I took the ephemeris to a copy to the clipboard and then opened it in Notepad ++. Did the needed edits and then saved for attaching to the post.

Looks like at the edge of civil and nautical twilight.

Not printing to a file. Copy/paste and then into an editor. Seemed to work fine that way to drop all the hours I did not want (when below horizon, etc).

No Angstrom symbol seen. Not sure where you are referring to. W7Pro64 US edition 2015

Jan 19th @18:00 is right square in the middle of civil twilight but at 67° up, I might try to view a 10th mag stellar object in a 24" reflector. But then again, I might need to alter some settings.

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I see the Angtrom symbol now in the attached text file that I copied and pasted into Notepad ++ but it is not in my original saved file.

   

[PMSchu]

Hi BMD,

You could calculate the ephemeris over the range of nights desired & copy it to the clipboard. Then paste into Notepad & remove the parts that you don't want & save what you want to keep, like so: [attachment=2196]

You could trim it further if you like or compute the ephemeris at hourly intervals. YMMV

Hope this helps,

Phil S.

[bigmasterdrago]

If I open the file in Word, notepad, wordpad or other text editor, I do not see an Angstom symbol.

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Somehow, the attaching process is adding that symbol? Strange.

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Hi BMD,

You could calculate the ephemeris over the range of nights desired & copy it to the clipboard. Then paste into Notepad & remove the parts that you don't want & save what you want to keep, like so: 

You could trim it further if you like or compute the ephemeris at hourly intervals. YMMV

Hope this helps,

Phil S.

Exactly what I'm doing but using Notepad++ to edit it. Works good and that's what I did. Greg just wanted to know where that Angstom symbol came from. Here is the original ephemeris copied and pasted into a text editor (notepad++).


  original ephemeris.txt (Size: 10.88 KB / Downloads: 4)

[PMSchu]

Hi BMD,

It seems that you did what I was suggesting already with Notepad. That's not an Angstrom symbol. The Angstrom symbol is an A with a circle over it like so: Å. What's in your file is a Â. Many years working in X-ray diffraction.

Did my file get the extra A added?

Phil S.

[bigmasterdrago]

just a string of text typed and saved in notepad++ to see what it does with it, No angston symbol but a ° symbol


  new 1.txt (Size: 96 bytes / Downloads: 4)

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Somehow?? an Angstom Symbol is getting added when a degree symbol is used in Notepad++. Stranger things have happened.

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I'm using alt+0176 to make the degree symbol

[PMSchu]

Yes, I see that the file I uploaded also has the  symbol added before the ° symbols. It wasn't in the original file upload.

Phil S.

[bigmasterdrago]

What I find odd is that the other ephemeris which was saved and edited does not have that Angstom Symbol next to the ° symbol.


  1994 PC1 Ephemeris.txt (Size: 2.04 KB / Downloads: 3)

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Sorry this has gone so far off topic to those only interested in the "Big Rock" pass in a few days