This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||
|
i just saw 17p holmes on its (supposedly) third outburst about an hour ago... pretty bright enough, however, i've searched the net and there hardly seems to be any much buzz about this 3rd outburst....is this notable enough for entry into the article??? in my opinion yes... but for others... Meynardtengco ( talk) 12:40, 13 March 2008 (UTC)
Image:17P-Holmes.jpg does not seem to be good for wikipedia. need to find a better one. or ask for permission to use one that is found on news sites now. 12.106.237.2 20:10, 25 October 2007 (UTC)
Where can this comet be seen from (North America?) and in what part of the sky and during what hours? (I'm surprised that informatino wasn't here---not even hinted at.) 128.101.254.41 22:36, 28 October 2007 (UTC)
This article is now on the front page in the In the News section. I have added a bit noted above. Spaceweather.com says that the comet is exploding and now has a physical size (including gas and particles and dust and such) larger than Jupiter. Can anyone confirm this with a better reference, I am not sure the spaceweather one has a permanent link, or at least I couldn't find one. Also it would be great if someone could drop a couple good refs into the discovery section. IvoShandor 07:38, 29 October 2007 (UTC)
The external links are becoming reminiscent of an agricultural operation which grows external links, several of these should have their relevant material integrated into the article and used as references. Others should just be dropped altogether. Once I look through them all I will see where I can add and try to trim the section to the most pertinent external links. The image gallery should be moved, those are all free use photos so if no one moves them to Commons I will just do it, and request their deletion here, hopefully someone has some time to move them before that though. We should create a gallery at Commons:17P/Holmes. IvoShandor 13:29, 29 October 2007 (UTC)
These useful links were removed on 7/16/08: Tom Ruen ( talk) 18:06, 16 July 2008 (UTC)
There is no indication within the article as to whether this is an unusual event. Is it?
WikiReaderer 15:37, 29 October 2007 (UTC)
Are there hypotheses/theories out there about why this kind of magnitude shift occurs? Applejuicefool 15:50, 29 October 2007 (UTC)
CielProfond 16:45, 30 October 2007 (UTC)
"It was confirmed by Edward Walter Maunder (Royal Observatory, Greenwich, England), William Henry Maw (England), and Kidd (Bramley, England)."
When u click the link about "kidd" it just goes to a link with basically no information about what or who "kidd" is.Why mention him/her/it and link it to another page if there's no other information about him/her/it ???
Also i believe there should be a section about possible causes for it flaring up like it has as i have no idea why it's done it. 82.21.204.72 18:05, 29 October 2007 (UTC)
I have removed the following line from the article: "On October 26 astronomer John Bortle said that the comet could reach the apparent size of the Moon in the night sky by the time the outburst ends in either a matter of days or weeks.[8]"
A comet with an orbit that is further away from Earth than the orbit of Mars would have to be many times larger than a planet in order to appear as large as our Moon in the night sky. E James (talk) 19:48, 29 October 2007 (UTC)
Would it be accurate to say that the comet was "at the left hand of Perseus" when it exploded? (the article on the constellation describes an "alternate" linkage for which this is the case, but it doesn't say what that's an alternate to) Also, the article on the mythological Perseus has two pictures of statues where he holds the head of Medusa in his left hand, but is that true of the constellation? I wonder whether an ancient observer would have concluded that Perseus just threw Medusa's head across the skies... 70.15.116.59 23:07, 29 October 2007 (UTC)
Hi. Just to let you know, ref #2 is the same as ref #5. I don't have time to fix it now because the refs have different names and places where they are cited. So, could someone come fix this? Also, there are some BadAstronomy posts that perhaps you could cite, but a lot of them are from last week. Is this comet getting more attention than comet McNaught? Should we list the most likely causes for the outburst? Thanks. ~ A H 1( T C U) 00:44, 30 October 2007 (UTC)
With regard to Comet Holmes trajectory TLR1.gif, the date 2/15 looks like it refers to the wrong point (during the approach rather than recession) and the gap between 8/17 and 8/31 is too great (should be 2 points not 4). Can anyone fix? Thanks. Secret Squïrrel, approx 03:35, Hallowe'en 2007 (UTC)
Regarding the comment, "...the comet looked like a fuzzy disk, somewhat similar to the M31 galaxy in Andromeda." I don't want to nitpick too much, and I didn't change it because I wanted to get feedback, but there are two reasons it's fairly different looking than M31 (the Andromeda Galaxy). First, it's pretty much round whereas M31 is oblong. Second, it's much much brighter than M31. Anyway, I was just kind of thinking that the "somewhat similar..." part might be better left off. I'll gladly defer to others on this. FlintstoneStargazer 04:54, 31 October 2007 (UTC)
Is it possible to put in the article exactly how many years ago the brightening event occured (based on its observed position)? Since it is quite a few light years away and varies in its distance from Earth, how old an event are we watching now? —Preceding unsigned comment added by Thinking-ape ( talk • contribs) 07:42, 31 October 2007 (UTC)
-- Captain Sumo 09:59, 31 October 2007 (UTC)
I am slightly confused with the German interwiki links among some of these stars: Alpha Persei (aka Mirfak or Algenib) has no German interwiki link; Gamma Persei links to a non-existent Alpecher; Alcheb (seen on the one of the comet maps here) redirects to Alpha Persei which does not refer to Alcheb - is this correct?; Algenib yields a disambig with a choice of Alpha and Gamma Pegasi, this seems right. If I've understood this right it seems the problem is partly on the German wikipedia where their de:Algenib article contains two different stars: Gamma Pegasi first, followed by Alpha Persei. The German Algenib then links to the English Gamma Persei. I guess the German Algenib was meant to be a disambig to be linked to the English Algenib. Maybe this isn't the right place to ask, but can anyone make this clearer here and on the German side, and maybe also annotate the Comet maps to clarify which Mirfak and which Algenib is meant?- Wikianon 20:49, 31 October 2007 (UTC)
I reincorporated my version of the 3d interactive graphic. My version is easier to use.
Larry Koehn —Preceding unsigned comment added by Firstmagnitude ( talk • contribs) 23:12, 31 October 2007 (UTC)
Is there a source that lists the 17P/Holmes's magnitude? -- Toytoy 02:24, 2 November 2007 (UTC)
I agree with user Awolf002's edit and comment. Is the magnitude information really needed in the opening paragraph? Also, I calculated 100^((17-2.8)/5) = 480,000 (to two significant figures). How accurate are the 17 and 2.8 in the article? - Astrochemist 04:53, 6 November 2007 (UTC)
In only 1.75 days of October 2007, the comet brightened from
magnitude 17 to 2.8 — beyond invisible in nearly all
nonprofessional telescopes to
naked eye
in any city. This unprecedented(I'm not sure, better doublecheck) outburst is hundreds of thousands of times greater in brightness.
or,
In late October 2007, the comet brightened from magnitude 17 to 2.8 — beyond invisible in nearly all amateur telescopes, to naked eye in any city, in only 1.75 days. This unprecedented(I'm not sure, better doublecheck) outburst is hundreds of thousands of times greater in brightness.
I did some editing on the opening paragraph as well. Sadly, there are many moderate (and large!) cities in which Holmes cannot be seen. -- Also, the scatter in the brightness (magnitude) graphs cited on this page is quite large at the lower (dark) end, so I qualified the related passage in the article. Astrochemist 22:50, 8 November 2007 (UTC)
Kingturtle 20:38, 15 November 2007 (UTC)
Hi. Now that it's bigger than the sun, that makes two comets so far this year larger than the sun in coma size. The other one was Comet McNaught. Just look at McNaught's SOHO images, the coma was clearly larger than the sun. Should this info be mentioned in either article? Should we create a list of comets whose comas were known to have been larger than the sun? Thanks. ~ A H 1( T C U) 03:42, 17 November 2007 (UTC)
Hi. The simulation shows the comet covering Algol. When will this happen approximately? The the comet's surface brightness be recognisable at that time? Thanks. ~ A H 1( T C U) 22:48, 17 November 2007 (UTC)
I agree there should not be a meteor shower since Holmes orbits at twice Earths distance from the Sun, and the larger dust particles are left along the comet's orbital path while smaller particles are pushed away from the Sun into the comet's tail by solar winds. Kheider ( talk) 04:55, 18 November 2007 (UTC)
Hi. If I uploaded some 15-second exposures using a 4-6 inch telescope and a digital camera sometime in January, would someone be able to take the images and stack them together, and re-upload it onto Wikipedia? Thanks. ~ A H 1( T C U) 01:07, 20 November 2007 (UTC)
See: Wikipedia:Featured picture candidates/Comet 17P/Holmes Tom Ruen ( talk) 22:04, 20 November 2007 (UTC)
Hello fellow Wikipedians,
I have just modified 2 external links on Comet Holmes. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 10:24, 25 January 2018 (UTC)
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||
|
i just saw 17p holmes on its (supposedly) third outburst about an hour ago... pretty bright enough, however, i've searched the net and there hardly seems to be any much buzz about this 3rd outburst....is this notable enough for entry into the article??? in my opinion yes... but for others... Meynardtengco ( talk) 12:40, 13 March 2008 (UTC)
Image:17P-Holmes.jpg does not seem to be good for wikipedia. need to find a better one. or ask for permission to use one that is found on news sites now. 12.106.237.2 20:10, 25 October 2007 (UTC)
Where can this comet be seen from (North America?) and in what part of the sky and during what hours? (I'm surprised that informatino wasn't here---not even hinted at.) 128.101.254.41 22:36, 28 October 2007 (UTC)
This article is now on the front page in the In the News section. I have added a bit noted above. Spaceweather.com says that the comet is exploding and now has a physical size (including gas and particles and dust and such) larger than Jupiter. Can anyone confirm this with a better reference, I am not sure the spaceweather one has a permanent link, or at least I couldn't find one. Also it would be great if someone could drop a couple good refs into the discovery section. IvoShandor 07:38, 29 October 2007 (UTC)
The external links are becoming reminiscent of an agricultural operation which grows external links, several of these should have their relevant material integrated into the article and used as references. Others should just be dropped altogether. Once I look through them all I will see where I can add and try to trim the section to the most pertinent external links. The image gallery should be moved, those are all free use photos so if no one moves them to Commons I will just do it, and request their deletion here, hopefully someone has some time to move them before that though. We should create a gallery at Commons:17P/Holmes. IvoShandor 13:29, 29 October 2007 (UTC)
These useful links were removed on 7/16/08: Tom Ruen ( talk) 18:06, 16 July 2008 (UTC)
There is no indication within the article as to whether this is an unusual event. Is it?
WikiReaderer 15:37, 29 October 2007 (UTC)
Are there hypotheses/theories out there about why this kind of magnitude shift occurs? Applejuicefool 15:50, 29 October 2007 (UTC)
CielProfond 16:45, 30 October 2007 (UTC)
"It was confirmed by Edward Walter Maunder (Royal Observatory, Greenwich, England), William Henry Maw (England), and Kidd (Bramley, England)."
When u click the link about "kidd" it just goes to a link with basically no information about what or who "kidd" is.Why mention him/her/it and link it to another page if there's no other information about him/her/it ???
Also i believe there should be a section about possible causes for it flaring up like it has as i have no idea why it's done it. 82.21.204.72 18:05, 29 October 2007 (UTC)
I have removed the following line from the article: "On October 26 astronomer John Bortle said that the comet could reach the apparent size of the Moon in the night sky by the time the outburst ends in either a matter of days or weeks.[8]"
A comet with an orbit that is further away from Earth than the orbit of Mars would have to be many times larger than a planet in order to appear as large as our Moon in the night sky. E James (talk) 19:48, 29 October 2007 (UTC)
Would it be accurate to say that the comet was "at the left hand of Perseus" when it exploded? (the article on the constellation describes an "alternate" linkage for which this is the case, but it doesn't say what that's an alternate to) Also, the article on the mythological Perseus has two pictures of statues where he holds the head of Medusa in his left hand, but is that true of the constellation? I wonder whether an ancient observer would have concluded that Perseus just threw Medusa's head across the skies... 70.15.116.59 23:07, 29 October 2007 (UTC)
Hi. Just to let you know, ref #2 is the same as ref #5. I don't have time to fix it now because the refs have different names and places where they are cited. So, could someone come fix this? Also, there are some BadAstronomy posts that perhaps you could cite, but a lot of them are from last week. Is this comet getting more attention than comet McNaught? Should we list the most likely causes for the outburst? Thanks. ~ A H 1( T C U) 00:44, 30 October 2007 (UTC)
With regard to Comet Holmes trajectory TLR1.gif, the date 2/15 looks like it refers to the wrong point (during the approach rather than recession) and the gap between 8/17 and 8/31 is too great (should be 2 points not 4). Can anyone fix? Thanks. Secret Squïrrel, approx 03:35, Hallowe'en 2007 (UTC)
Regarding the comment, "...the comet looked like a fuzzy disk, somewhat similar to the M31 galaxy in Andromeda." I don't want to nitpick too much, and I didn't change it because I wanted to get feedback, but there are two reasons it's fairly different looking than M31 (the Andromeda Galaxy). First, it's pretty much round whereas M31 is oblong. Second, it's much much brighter than M31. Anyway, I was just kind of thinking that the "somewhat similar..." part might be better left off. I'll gladly defer to others on this. FlintstoneStargazer 04:54, 31 October 2007 (UTC)
Is it possible to put in the article exactly how many years ago the brightening event occured (based on its observed position)? Since it is quite a few light years away and varies in its distance from Earth, how old an event are we watching now? —Preceding unsigned comment added by Thinking-ape ( talk • contribs) 07:42, 31 October 2007 (UTC)
-- Captain Sumo 09:59, 31 October 2007 (UTC)
I am slightly confused with the German interwiki links among some of these stars: Alpha Persei (aka Mirfak or Algenib) has no German interwiki link; Gamma Persei links to a non-existent Alpecher; Alcheb (seen on the one of the comet maps here) redirects to Alpha Persei which does not refer to Alcheb - is this correct?; Algenib yields a disambig with a choice of Alpha and Gamma Pegasi, this seems right. If I've understood this right it seems the problem is partly on the German wikipedia where their de:Algenib article contains two different stars: Gamma Pegasi first, followed by Alpha Persei. The German Algenib then links to the English Gamma Persei. I guess the German Algenib was meant to be a disambig to be linked to the English Algenib. Maybe this isn't the right place to ask, but can anyone make this clearer here and on the German side, and maybe also annotate the Comet maps to clarify which Mirfak and which Algenib is meant?- Wikianon 20:49, 31 October 2007 (UTC)
I reincorporated my version of the 3d interactive graphic. My version is easier to use.
Larry Koehn —Preceding unsigned comment added by Firstmagnitude ( talk • contribs) 23:12, 31 October 2007 (UTC)
Is there a source that lists the 17P/Holmes's magnitude? -- Toytoy 02:24, 2 November 2007 (UTC)
I agree with user Awolf002's edit and comment. Is the magnitude information really needed in the opening paragraph? Also, I calculated 100^((17-2.8)/5) = 480,000 (to two significant figures). How accurate are the 17 and 2.8 in the article? - Astrochemist 04:53, 6 November 2007 (UTC)
In only 1.75 days of October 2007, the comet brightened from
magnitude 17 to 2.8 — beyond invisible in nearly all
nonprofessional telescopes to
naked eye
in any city. This unprecedented(I'm not sure, better doublecheck) outburst is hundreds of thousands of times greater in brightness.
or,
In late October 2007, the comet brightened from magnitude 17 to 2.8 — beyond invisible in nearly all amateur telescopes, to naked eye in any city, in only 1.75 days. This unprecedented(I'm not sure, better doublecheck) outburst is hundreds of thousands of times greater in brightness.
I did some editing on the opening paragraph as well. Sadly, there are many moderate (and large!) cities in which Holmes cannot be seen. -- Also, the scatter in the brightness (magnitude) graphs cited on this page is quite large at the lower (dark) end, so I qualified the related passage in the article. Astrochemist 22:50, 8 November 2007 (UTC)
Kingturtle 20:38, 15 November 2007 (UTC)
Hi. Now that it's bigger than the sun, that makes two comets so far this year larger than the sun in coma size. The other one was Comet McNaught. Just look at McNaught's SOHO images, the coma was clearly larger than the sun. Should this info be mentioned in either article? Should we create a list of comets whose comas were known to have been larger than the sun? Thanks. ~ A H 1( T C U) 03:42, 17 November 2007 (UTC)
Hi. The simulation shows the comet covering Algol. When will this happen approximately? The the comet's surface brightness be recognisable at that time? Thanks. ~ A H 1( T C U) 22:48, 17 November 2007 (UTC)
I agree there should not be a meteor shower since Holmes orbits at twice Earths distance from the Sun, and the larger dust particles are left along the comet's orbital path while smaller particles are pushed away from the Sun into the comet's tail by solar winds. Kheider ( talk) 04:55, 18 November 2007 (UTC)
Hi. If I uploaded some 15-second exposures using a 4-6 inch telescope and a digital camera sometime in January, would someone be able to take the images and stack them together, and re-upload it onto Wikipedia? Thanks. ~ A H 1( T C U) 01:07, 20 November 2007 (UTC)
See: Wikipedia:Featured picture candidates/Comet 17P/Holmes Tom Ruen ( talk) 22:04, 20 November 2007 (UTC)
Hello fellow Wikipedians,
I have just modified 2 external links on Comet Holmes. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 10:24, 25 January 2018 (UTC)