2012年1月主要彗星
Comet Chasing in January Comet chasing is the visual observation of telescopic comets.News[*]2011 W3 (Lovejoy) has unexpectedly survived perihelion! This comet is visible just before dawn from the southern hemisphere.
[*]P/2006 T1 (Levy) is very faint--possibly fainter than 20th magnitude. Various web sites and most software (online or otherwise--including Google Sky) is showing this comet as 11th magnitude. There are web sites predicting it will be 7th magnitude in January, which is highly doubtful. In fact this comethas not been observed since 2006 and the orbital data and magnitude parameters are not up to date. The creators of these web sites and software do not monitor actual observations and the result is unreliable information. In fact these sources also still show 2010 X1 (Elenin) which disintegrated over a month ago! What a huge disservice they are doing. I urge readers to complain about it to them.
[*]2010 X1 (Elenin) has disintegrated. It faded dramatically after a solar flare on August 20. Images at the end of August revealed a spreading, more diffuse coma. The remnants of this comet can be observed visually, but it is a difficult observation requiring a dark site and considerable expertise in spotting diffuse objects.
[*]2011 Q4 (SWAN) is a new discovery of September 5 via SWAN, apparently independently by Vladimir Bezugly and Rob Matson. See below for details.
Comet Visibility in the Eyepiece This page uses code developed for SkyTools 3 to predict the visibility of a comet in the eyepiece.Predicting how much aperture is required to see a comet is a very complex task.Have a look for yourself: a comparison of the predictions below (such as "visible in small telescopes") to the magnitude of each comet shows just how poor an indicator the magnitude alone really is.When you read below that a particular aperture is required to see a comet you can have a reasonable degree of confidence that the comet can in fact be seen in the eyepiece. Make your own custom charts and predictions for your location and equipment: software for comet observing Comet Synopses for January Explanation of Comet Synopses and charts (read this if you have questions)Charts look poor or grainy? Read this.C/2011 W3 (Lovejoy): A morning comet visible in binoculars
This comet begins the month in Ara with a coma magnitude of 5. Look for at least a 5o tail, which is this comet's most visible feature. It should fade rapidly, moving into Caelum by month's end. The best visibility is early in the month as seen from the southern hemisphere.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NNot visibleNot visibleNot visibleNot visibleNot visible
40o NNot visibleNot visibleNot visibleNot visibleVery low in the southern sky in moonlight at ~20:1024-
EquatorVery low in the southern sky during morning twilight at ~05:00Not visibleLow in the southern sky at ~21:00Fairly high at ~20:40High in moonlight at ~20:001-5, 9-
30o SFairly high in the southern sky during morning twilight at ~03:30Fairly high in the southern sky in moonlight at ~01:20High at ~21:00High at ~20:50High at ~21:501-
C/2009 P1 (Garradd): A morning comet visible in binoculars
This comet begins the month in Hercules at magnitude 6.7. Look for a 5" coma. It should brighten slowly.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NFairly high during morning twilight at ~06:10High during morning twilight at ~06:30High during morning twilight at ~06:10High at ~06:00High at ~05:501-
40o NFairly high in the eastern sky during morning twilight at ~05:50Fairly high during morning twilight at ~06:00High during morning twilight at ~05:50High at ~05:40High at ~05:401-
EquatorNot visibleLow in the eastern sky during morning twilight at ~05:10Low in the eastern sky during morning twilight at ~05:10Fairly high in the eastern sky during morning twilight at ~05:00Fairly high in the eastern sky during morning twilight at ~05:001-
30o SNot visibleNot visibleNot visibleNot visibleNot visible1-20, 25-
29P/Schwassmann-Wachmann: A morning comet visible in a 12.5-inch telescope
This comet begins the month in Corvus, perhaps as bright as magnitude 10.2. Look for a 7' coma. This comet was apparently caught in one of its frequent outbursts near the end of December. It is typically much fainter.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NFairly high in the southern sky at ~05:50Fairly high in the southern sky in moonlight at ~05:10Fairly high in the southern sky in moonlight at ~04:50Fairly high in the southern sky at ~04:40Fairly high in the southern sky at ~04:101-
40o NFairly high at ~05:40Fairly high in moonlight at ~04:50Fairly high in moonlight at ~04:40Fairly high at ~04:40Fairly high at ~04:101-
EquatorHigh at ~04:40High during morning twilight at ~05:10High in moonlight at ~04:40High at ~04:30High at ~04:101-
30o SHigh during morning twilight at ~03:30High during morning twilight at ~03:40High during morning twilight at ~03:50High at ~03:40High at ~03:501-
78P/Gehrels: An evening comet visible in a 12.5-inch telescope
This comet begins the month in Pisces at magnitude 10.6. Look for a 4.5' coma. It should fade slowly.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NFairly high during evening twilight at ~18:00Fairly high in moonlight at ~18:10Fairly high at ~18:20Fairly high at ~18:30Fairly high during evening twilight at ~18:301-
40o NHigh during evening twilight at ~18:20High during evening twilight at ~18:20High at ~18:40High at ~18:40High during evening twilight at ~18:501-
EquatorHigh during evening twilight at ~19:20High during evening twilight at ~19:20High at ~19:30High at ~19:30High during evening twilight at ~19:301-
30o SHigh during evening twilight at ~20:30Fairly high during evening twilight at ~20:20Fairly high during evening twilight at ~20:30Fairly high during evening twilight at ~20:30Fairly high in the western sky during evening twilight at ~20:201-
C/2010 S1 (LINEAR): A northern hemisphere evening comet visible in a 12.5-inch telescope
This comet begins the month in Lacerta at magnitude 13.6. Look for a 30" coma. It should remain constant, moving into Andromeda by month's end.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NHigh in moonlight at ~18:00High during evening twilight at ~18:00High at ~18:20High at ~18:30High during evening twilight at ~18:301-
40o NHigh during evening twilight at ~18:20High during evening twilight at ~18:20High at ~18:30High at ~18:40High during evening twilight at ~18:401-
EquatorFairly high in the northern sky during evening twilight at ~19:10Fairly high in the northern sky during evening twilight at ~19:10Low in the northern sky during evening twilight at ~19:20Low in the northern sky during evening twilight at ~19:20Low in the northern sky during evening twilight at ~19:101-
30o SNot visibleNot visibleNot visibleNot visibleNot visible
C/2010 G2 (Hill): An evening comet visible in a 14-inch telescope
This comet begins the month in Cetus at magnitude 10.3. Look for a 4.5' coma. It should fade by about 1.1 magnitudes, moving into Eridanus by month's end.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NFairly high in moonlight at ~20:20Fairly high in moonlight at ~19:50Fairly high at ~19:20Fairly high at ~18:50Fairly high in moonlight at ~18:401-
40o NHigh in moonlight at ~20:20High in moonlight at ~19:50High at ~19:20High at ~19:00High in moonlight at ~18:501-
EquatorHigh at ~23:40High in moonlight at ~19:50High at ~19:40High at ~19:30High in moonlight at ~19:301-
30o SFairly high at ~23:20High during evening twilight at ~20:30High at ~20:40High during evening twilight at ~20:30High during evening twilight at ~20:301-
21P/Giacobini-Zinner: A northern hemisphere evening comet visible in very large telescopes
This comet begins the month in Aquila at magnitude 8.9. Look for a 10' coma. It should brighten by about 0.9 magnitudes, moving into Aquarius by month's end.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NLow in the western sky during evening twilight at ~17:40Low in the western sky during evening twilight at ~17:30Very low in the western sky during evening twilight at ~17:50Very low in the western sky during evening twilight at ~18:00Very low in the western sky during evening twilight at ~18:101-
40o NLow in the western sky during evening twilight at ~18:10Low in the western sky during evening twilight at ~18:00Low in the western sky during evening twilight at ~18:20Very low in the western sky during evening twilight at ~18:30Very low in the western sky during evening twilight at ~18:301-
EquatorVery low in the western sky during evening twilight at ~19:00Very low in the western sky during evening twilight at ~19:00Very low in the western sky during evening twilight at ~19:10Very low in the western sky during evening twilight at ~19:10Very low in the western sky during evening twilight at ~19:101-
30o SNot visibleNot visibleNot visibleNot visibleNot visible
C/2011 Q4 (SWAN): A morning comet visible in very large telescopes
This comet begins the month in Bootes at magnitude 11.6. Look for a 3.5' coma. It should fade slowly, moving into Canes Venatici by month's end.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NHigh at ~06:00High in moonlight at ~05:50High during morning twilight at ~06:10High at ~05:40High at ~05:101-
40o NHigh at ~05:40High at ~05:40High during morning twilight at ~05:50High at ~05:30High at ~05:101-
EquatorHigh during morning twilight at ~04:50High during morning twilight at ~05:10High during morning twilight at ~05:00High at ~04:50High at ~04:501-
30o SLow in the eastern sky during morning twilight at ~03:50Fairly high in the northern sky during morning twilight at ~04:10Fairly high in the northern sky during morning twilight at ~04:00Fairly high in the northern sky during morning twilight at ~04:00Low in the northern sky during morning twilight at ~04:001-
45P/Honda-Mrkos-Pajdusakova: A morning comet visible in very large telescopes
This comet begins the month in Virgo at magnitude 12.4. Look for a 3' coma. It should fade rapidly.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NFairly high in the southern sky during morning twilight at ~06:10Fairly high in the southern sky during morning twilight at ~06:20Fairly high in the southern sky during morning twilight at ~06:10Fairly high in the southern sky at ~05:50Fairly high in the southern sky at ~05:301-
40o NFairly high at ~05:40Fairly high during morning twilight at ~05:50High during morning twilight at ~05:50High at ~05:40High at ~05:301-
EquatorHigh at ~04:40High during morning twilight at ~05:10High during morning twilight at ~05:00High at ~04:50High at ~04:501-
30o SFairly high during morning twilight at ~03:30High during morning twilight at ~03:50High during morning twilight at ~03:50High during morning twilight at ~03:50High at ~03:501-
49P/Arend-Rigaux: A morning comet visible in very large telescopes
This comet begins the month in Virgo at magnitude 13.5. Look for a 1' coma. It should fade slowly, moving into Coma Berenices by month's end.FINDER CHART
LatitudeVisibility December 31Visibility January 7Visibility January 14Visibility January 21Visibility January 28Nights Visible
55o NHigh at ~05:20High in moonlight at ~04:20High in moonlight at ~05:10High at ~04:20High at ~04:001-
40o NHigh at ~05:20High in moonlight at ~04:10High in moonlight at ~05:10High at ~04:20High at ~04:001-
EquatorHigh at ~04:40High during morning twilight at ~05:10High in moonlight at ~04:50High at ~04:20High at ~04:001-
30o SHigh during morning twilight at ~03:30High during morning twilight at ~03:40High during morning twilight at ~03:50High at ~03:40High at ~03:501-
Summary Data for This Month's Telescopic CometsHere's a list of the comets brighter than 15th magnitude.This table is updated as necessary.The last column indicates the date of the last observation used to compute these values.The constellation listed is where the comet was on the first of the month.
CometConstellationJanuary 1stJanuary 15thJanuary 31stObservations as of (UT)
MagDiamMagDiamMagDiam
C/2011 W3 (Lovejoy)Ara5.65.5'7.35.4'9.53.4'2011 December 29
C/2009 P1 (Garradd)Hercules6.73"6.63"6.54"2011 December 23
21P/Giacobini-ZinnerAquila8.99.6'8.49.8'8.010.1'2011 December 23
C/2011 A3 (Gibbs)*Scutum9?7'?9??9??2011 October 16
29P/Schwassmann-WachmannCorvus10.26.4'10.16.6'10.06.9'2011 December 7
C/2010 G2 (Hill)Cetus10.35.3'10.84.5'11.43.8'2011 December 23
78P/GehrelsPisces10.64.7'10.74.4'11.04.1'2011 December 23
C/2011 Q4 (SWAN)Bootes11.63.5'11.83.7'12.03.9'2011 December 7
45P/Honda-Mrkos-PajdusakovaVirgo12.52.9'13.23.0'14.03.1'2011 December 7
C/2011 M1 (LINEAR)Centaurus13??13??14??2011 September 25
49P/Arend-RigauxVirgo13.51.1'13.61.1'13.81.1'2011 December 25
C/2010 S1 (LINEAR)Lacerta13.632"13.632"13.631"2011 November 25
*In solar conjunction and not visible For the latest news and comet observations see the www.harvard.edu/icq/CometMags.html]ICQ/CBAT/MPC: Recent Comet Magnitude Estimates page.The www.harvard.edu/cfa/ps/Headlines.html]Astronomical Headlines page of the IAU is also a good source of information, particularly for recent discoveries.
For general information about comets see Gary W. Kronk's Cometography
Join the Comet Chasing discussion group Further reading: see Comet Chasing, Sky & Telescope, April 2005, pg. 83. Make your own custom charts for your location and telescope/binoculars: software for comet observing
Links Skyhound's Guide to Comets
Skyhound's Guide to Finding Comets
BAA Comet Section
www.harvard.edu/cfa/ps/Headlines.html]Astronomical Headlines (IAU)
Cometographyhttp://cometchasing.skyhound.com/skytools.jpg
Visit Software or the Skyhound observing page.
2011年12月Lovejoy 彗星（奇迹般的逃出太阳)实时更新影像
http://www.astronomy.com.cn/bbs/forum.php?mod=viewthread&tid=193581&fromuid=100793
C/2009 P1 (Garradd)
http://cometography.com/lcomets/2009p1.html
唉 看着我是没语了::070821_17.jpg:: 风真 发表于 2012-1-7 16:43 static/image/common/back.gif
唉 看着我是没语了
呵呵::070821_19.jpg::::070821_19.jpg::
45P早就已经销声匿迹观测不到了
Q4 SWAN 发现时就是14等现在还11？ 别闹笑话了
你的初衷是好的，为大家带来了预报。援引孙国佑老师在http://www.astronomy.com.cn/bbs/forum.php?mod=viewthread&tid=193581&page=2#pid2494910帖子中的回复就是：你以后转发信息，最好能自己也要考证下，发那么多错误信息，是会误导大众的。
Levy彗星哪儿去了？::070821_02.jpg::
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