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The Great Christmas Comet of 2011, 2011 W3 (Lovejoy)
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post Dec 2 2011, 09:59 PM
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http://sungrazer.nrl.navy.mil/index.php?p=.../birthday_comet

Possible very bright sungrazing comet coming mid December - Comet Lovejoy C/2011 W3 (Lovejoy)

Information in the link above.
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Mongo
post Dec 23 2011, 02:00 PM
Post #2


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Now that Lovejoy is "officially" a Great Comet, I have decided to update the ranking of the Great Comets of the past several centuries that I had done here at the time of comet McNaught in 2007.

The point scale went like this:

QUOTE
MAGNITUDE: 10 points for every degree of magnitude brighter than +3 (dark-sky; daytime magnitude gets counted separately)


No points in this category.

QUOTE
TAIL: 1 point for every two degrees of length of naked-eye visible tail in dark sky

DURATION VISIBLE: 1 point for every month naked-eye visible in dark sky


The last confirmed report I read gave a tail length of about 28 degrees, for 14 points. I also assume the minimum duration of visibility of one month, for one additional point.

QUOTE
BONUS POINTS:
2 visible tails = 10 points
5 visible tails (West 1976) = 20 points
15 degree long anti-tail (Arend-Roland 1957) = 10 points
curved tail (Donati 1858) = 5 points
'bright' tail (Daylight 1910) = 10 points
'brilliant' tail (Ikeya-Seki 1965, Great September 1882) = 20 points
circumpolar all night (Hyakutake 1996, Tebbutt 1861) = 10 points
Mag. -3 in daylight (West 1976) or Mag. -5 in daylight (Daylight 1910) = 10 points
Mag. -8 in daylight (Great March 1843) = 15 points
Mag. -15 in daylight (Ikeya-Seki 1965) or Mag. -17 in daylight (Great September 1882) = 30 points


While currently fading, the tail was considered bright earlier, for 10 points, and it will be circumpolar all night after New Years Day, for another 10 points. It also reached about magnitude -4 when rounding the sun, for 10 additional points. There were definitely two visible tails, a dust dail and an ion tail, for 10 points. While its tail is curved, it was not curved strongly enough to gain more points. This may change as the viewing geometry changes.

Using these numbers, comet Lovejoy currently garners 55 points.

The updated list:

1861 123 pts Tebbutt
2007 105 pts McNaught
1882 101 pts Great September Comet
1910 95 pts P/Halley
1976 90 pts West
1996 78 pts Hyakutake
1997 73 pts Hale-Bopp
1858 68 pts Donati
1965 64 pts Ikeya-Seki
1970 61 pts Bennett
1957 57 pts Arend-Roland
2011 55 pts Lovejoy
1910 54 pts Daylight Comet
1811 52 pts Great Comet
1927 51 pts Skjellerup-Maristany
1843 50 pts Great March Comet
1874 46 pts Coggia
1881 42 pts Great Comet
1807 37 pts Great Comet
1853 37 pts Klinkerfues
1835 35 pts P/Halley
1957 35 pts Mrkos
1860 31 pts Great Comet
1911 29 pts Beljawsky
1911 28 pts Brooks
1819 25 pts Tralles
1854 24 pts Great Comet

Here is the same list in reverse chronological order:

2011 55 pts Lovejoy
2007 105 pts McNaught
1997 73 pts Hale-Bopp
1996 78 pts Hyakutake
1976 90 pts West
1970 61 pts Bennett
1965 64 pts Ikeya-Seki
1957 57 pts Arend-Roland
1957 35 pts Mrkos
1927 51 pts Skjellerup-Maristany
1911 29 pts Beljawsky
1911 28 pts Brooks
1910 95 pts P/Halley
1910 54 pts Daylight Comet
1882 101 pts Great September Comet
1881 42 pts Great Comet
1874 46 pts Coggia
1861 123 pts Tebbutt
1860 31 pts Great Comet
1858 68 pts Donati
1854 24 pts Great Comet
1853 37 pts Klinkerfues
1843 50 pts Great March Comet
1835 35 pts P/Halley
1819 25 pts Tralles
1811 52 pts Great Comet
1807 37 pts Great Comet
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Posts in this topic
- Sunspot   The Great Christmas Comet of 2011   Dec 2 2011, 09:59 PM
- - Sunspot   Here it comes http://sohowww.nascom.nasa.gov//dat...   Dec 14 2011, 09:22 AM
- - titanicrivers   And check out the SOHO Movie Theater! Choose ...   Dec 15 2011, 04:14 AM
|- - SteveM   QUOTE (titanicrivers @ Dec 14 2011, 11:14...   Dec 17 2011, 03:39 AM
- - Mongo   Spaceweather COMET LOVEJOY UPDATE: Matthew Knigh...   Dec 15 2011, 07:59 PM
|- - stevesliva   QUOTE (Mongo @ Dec 15 2011, 03:59 PM) If ...   Dec 15 2011, 08:05 PM
- - Mongo   Same here. Right now it's overcast from horiz...   Dec 15 2011, 08:31 PM
- - Juramike   It lives! http://www.youtube.com/watch?featur...   Dec 16 2011, 02:06 AM
- - Mongo   Here is another video: http://sdoisgo.blogspot.co...   Dec 16 2011, 03:52 AM
- - Explorer1   That's one tough cookie.... Any estimate for h...   Dec 16 2011, 08:09 AM
- - jamescanvin   140,000 km (1.2 solar radii) above the surface   Dec 16 2011, 08:31 AM
|- - Mongo   QUOTE (jamescanvin @ Dec 16 2011, 08:31 A...   Dec 16 2011, 02:45 PM
- - Sunspot   Seems to have left it's tail behind. http:...   Dec 16 2011, 09:48 AM
|- - Toma B   QUOTE (Sunspot @ Dec 16 2011, 11:48 AM) S...   Dec 16 2011, 04:08 PM
- - Mongo   It is still very soon, but it appears that Comet L...   Dec 16 2011, 10:12 PM
- - Sunspot   The Ion tail has reappeared too.   Dec 16 2011, 10:47 PM
- - Mongo   Another movie: SOHO LASCO C3 This site only show...   Dec 17 2011, 03:29 AM
- - nprev   The next few days may prove interesting...and spec...   Dec 17 2011, 03:34 AM
- - Sunspot   Visual sightings starting to come in now.   Dec 17 2011, 01:10 PM
- - Floyd   Why is the view better from south of the Equater? ...   Dec 17 2011, 02:31 PM
- - Mongo   Comet Lovejoy is no longer a daylight comet, so da...   Dec 17 2011, 02:58 PM
- - Floyd   Thanks Mongo, great explanation!   Dec 17 2011, 06:00 PM
- - MaG   Our friends took image from Argentina today mornin...   Dec 17 2011, 08:46 PM
- - Mongo   This was posted today by highly respected astronom...   Dec 18 2011, 10:30 PM
- - nprev   ...if John Bortle says anything about comets, I be...   Dec 18 2011, 10:34 PM
- - Stu   Wow. Ok, now I really am officially northern hemi...   Dec 18 2011, 10:48 PM
|- - scalbers   QUOTE (Stu @ Dec 18 2011, 10:48 PM) Wow. ...   Dec 18 2011, 11:33 PM
- - nprev   Now, now, Stu...we had Hale-Bopp! But, yea...   Dec 18 2011, 10:55 PM
- - Mongo   Report of a daylight sighting of Comet Lovejoy on ...   Dec 19 2011, 12:21 AM
- - nprev   Wow. Mongo, please keep feeding salient info like...   Dec 19 2011, 12:58 AM
- - Mongo   For those readers who are in the southern hemisphe...   Dec 19 2011, 02:15 AM
- - Mongo   From Malargue, Argentina this morning:   Dec 19 2011, 02:14 PM
- - Mongo   Finder chart for 35 degrees south on Wednesday mor...   Dec 19 2011, 08:44 PM
- - Stu   Tail sighted - and photographed - from Australia.....   Dec 19 2011, 09:30 PM
- - Mongo   This is interesting. From the comet-ml mailing li...   Dec 19 2011, 09:45 PM
- - nprev   Magnificent!!!   Dec 20 2011, 04:06 AM
- - machi   Amazing images, it's unbelievable, that this l...   Dec 20 2011, 10:06 AM
- - tasp   Impressive it withstood the tidal effects too.   Dec 20 2011, 02:06 PM
- - Mongo   Latest today from comet-ml mailing list: QUOTE Hi...   Dec 20 2011, 06:59 PM
|- - jamescanvin   QUOTE (Mongo @ Dec 20 2011, 06:59 PM) The...   Dec 20 2011, 09:45 PM
- - nprev   In moonlight, no less. Good grief.   Dec 20 2011, 07:45 PM
- - Mongo   Finder charts for 35 degrees South latitude on Thu...   Dec 20 2011, 08:40 PM
- - Mongo   Oh-oh. That title change may have been premature....   Dec 20 2011, 11:51 PM
- - Mongo   A photo from this post: QUOTE After reading Ian C...   Dec 21 2011, 12:27 AM
- - Mongo   From comet-ml post #18958: QUOTE Hi all, When I ...   Dec 21 2011, 12:52 AM
- - Mongo   From comet-ml post #18977: QUOTE Hi All, I have ...   Dec 21 2011, 05:06 PM
- - Mongo   From this Brazilian Portuguese-language blog:   Dec 21 2011, 05:09 PM
- - Mongo   From comet-ml post #18990 by Robert McNaught: QUO...   Dec 21 2011, 07:58 PM
- - Mongo   Here is a photo from this morning by outbackmanyep...   Dec 21 2011, 08:07 PM
- - Mongo   Photo from this site:   Dec 21 2011, 09:46 PM
|- - ugordan   Wow.   Dec 21 2011, 10:05 PM
- - scalbers   Very nice. Looks rather brighter than pieces of Mi...   Dec 21 2011, 11:06 PM
- - Mongo   There are some incredible movies now available fro...   Dec 22 2011, 12:07 AM
- - Mongo   The latest image of Comet Lovejoy, by Colin Legg. ...   Dec 22 2011, 03:11 PM
- - Stu   Good grief... view from the ISS... http://www.fli...   Dec 22 2011, 06:54 PM
- - Tesheiner   Wow!   Dec 22 2011, 07:20 PM
- - Stu   Lovejoy Rising...   Dec 22 2011, 08:44 PM
- - centsworth_II   This time lapse via a tip from Emily's Twitter...   Dec 22 2011, 09:08 PM
- - Stu   Just saw that, wish I'd noticed there were ear...   Dec 22 2011, 09:12 PM
- - Mongo   From comet-ml post #19028 by Dave Herald: QUOTE A...   Dec 22 2011, 10:48 PM
- - Mongo   Here is a cropped version of the full-resolution p...   Dec 22 2011, 10:53 PM
- - Mongo   I like this shot, taken by Jim Gifford, it is very...   Dec 22 2011, 10:58 PM
- - Mongo   From comet-ml post #19031 by David Seargent: QUOT...   Dec 23 2011, 12:35 AM
- - Mongo   A great photo by Lester Barnes of south Australia:   Dec 23 2011, 01:57 AM
- - Mongo   Commentary by John Bortle (comet-ml post #19037) o...   Dec 23 2011, 01:29 PM
- - Mongo   From comet-ml post #19038, replying to David Searg...   Dec 23 2011, 01:34 PM
- - Mongo   Another report on the comet by Geoff Dudley (comet...   Dec 23 2011, 01:42 PM
- - Mongo   Now that Lovejoy is "officially" a Great...   Dec 23 2011, 02:00 PM
- - Mongo   As expected, comet Lovejoy is growing more promine...   Dec 23 2011, 07:04 PM
- - Mongo   To make comparisons easier, I have put images of I...   Dec 23 2011, 07:15 PM
- - Mongo   The tail is getting bigger! From Rob Kaufman ...   Dec 23 2011, 07:21 PM
- - Mongo   From Robert McNaught, comet-ml post #19047: QUOTE...   Dec 23 2011, 10:42 PM
- - Mongo   More confirmation of today's observations, by ...   Dec 23 2011, 11:08 PM
- - Mongo   A response by Vello Tabur in comet-ml post #19055 ...   Dec 24 2011, 03:53 AM
- - elakdawalla   Mongo, I just want to say thanks for these summari...   Dec 24 2011, 04:03 PM
|- - ElkGroveDan   QUOTE (elakdawalla @ Dec 24 2011, 08:03 A...   Dec 24 2011, 04:13 PM
- - Explorer1   That would be rather tricky, considering the Darie...   Dec 24 2011, 06:46 PM
- - Mongo   Christmas Eve image of comet Lovejoy by Scott Alde...   Dec 24 2011, 07:42 PM
- - nprev   W O W ! ! !   Dec 25 2011, 01:36 AM
- - Mongo   Yes, I think that Lovejoy has done quite well for ...   Dec 25 2011, 02:08 AM
- - Mongo   From comet-ml post #19078 by David Seargent: QUOT...   Dec 25 2011, 02:55 PM
- - Mongo   From comet-ml post #19088 by Robert McNaught: QUO...   Dec 25 2011, 07:41 PM
- - Mongo   Comet-ml post #19096 by Rob Kaufman: QUOTE Here...   Dec 26 2011, 02:30 PM
- - Mongo   Comet-ml post #19100 bt Dave Herald, regarding the...   Dec 26 2011, 02:35 PM
- - Mongo   Comet-ml post #19101 by Rob Kaufman: QUOTE Hi Fra...   Dec 26 2011, 02:37 PM
- - Mongo   From comet-ml post #19115 by Jim Gifford: QUOTE A...   Dec 26 2011, 08:37 PM
- - Stu   Latest ISS shots put together...   Dec 26 2011, 09:07 PM
- - Mongo   From comet-ml post #19117 by Rob Kaufman: QUOTE N...   Dec 26 2011, 09:28 PM
- - Mongo   Comet-ml post #19119 by John Bortle: QUOTE --- In...   Dec 26 2011, 10:57 PM
- - Mongo   Comet-ml post #19122 by David Seargent QUOTE Hi a...   Dec 27 2011, 02:47 AM
- - Mongo   Comet-ml post #19122 by Vello Tabur QUOTE Hi, I ...   Dec 27 2011, 02:54 AM
- - Mongo   From comet-ml post #19128 by Michael Mattiazzo: Q...   Dec 27 2011, 05:49 PM
- - Mongo   A spectacular image hosted on Gary Kronk's Com...   Dec 27 2011, 08:02 PM
- - Mongo   Comet-ml post #19131 by Andrew Pearce: QUOTE Hi a...   Dec 29 2011, 02:00 AM
- - Mongo   Comet-ml post #19142 by Andrew Pearce QUOTE Hi Al...   Dec 29 2011, 11:02 PM
- - Mongo   Comet-ml post #19150 by Chris: QUOTE Hi all, I ob...   Dec 31 2011, 01:13 AM
- - Mongo   From comet-ml post #19154 by Michael Mattiazzo QU...   Dec 31 2011, 02:15 PM
- - Mongo   Comet-ml post #19169 and #19174 by David Seargent...   Jan 1 2012, 06:39 PM
- - Mongo   Comet-ml post #19176 by John Bortle: QUOTE By phy...   Jan 1 2012, 06:43 PM
- - nprev   Just heard from my stepdaughter, who returned toda...   Jan 2 2012, 03:28 AM
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