[BAA Comets] [comets-ml] C/2012 F6 Lemmon

[Uwe Pilz]

	Dear Denis,

	 

	PansSTARRS has an unusual latge spectrum of particel sizes in the
dust tail. This leads to an unusual wide tail - I guess you have seen
those images from spring.

	If you look at such a tail form the orbaital plane it may be seen at
both sides of the coma. This is a projection effect. This effects was
 very distinct for PanSTARRS and yould be seen in the telescope
without much trouble.

	--

	Uwe Pilz, Leipzig, Germany.
   
  

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An:, "COML" , "BAA Comets discussion list" 
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Gesendet:Wed, 28 Aug 2013 16:53:03 +0100
Betreff:[comets-ml] C/2012 F6 Lemmon

 Hello all,
 I imaged this comet last night and saw that there continues to be an
amount of material forward of 
 the coma in the form of a forward spike. Is this due to the
perspective effect of us passing through 
 the comet's orbital plane,in the same way that we saw the huge
forward tail extension on C/2011 L4 
 PanSTARRS earlier this year? Are these forward tail spikes the same
features as the so called 
 anti-tails as seen on the famous 1957 comet, C/1957 R1 Arend-Roland?
Are we seeing more examples of 
 this type of feature on comet tails because our digital detectors
are much more sensitive than 
 photographic films and plates were in the past? There was a good
deal of interest and surprise in 
 the phenomena of anti-tails when one was seen in images of C/19657
R1 Arend-Roland, yet we seem less 
 excited when we see this phenomena on a comet image these days.Is
[1] this because we understand all 
 aspects of comet tail development and viewing perspective?

 My image from last night is posted at these links:
http://britastro.org/baa/index.php?view=detail&id=1473&option=com_joomgallery&Itemid=200
[2]
http://britastro.org/baa/index.php?view=detail&id=1474&option=com_joomgallery&Itemid=200
[3]

 Denis Buczynski
 Secretary Comet Section
 British Astronomical Association 

---------- UNI.DE TIPP ------------------------------
 NEU IST IMMER BESSER: BER DIE GIER NACH NEUEM UND UNSERE UNFHIGKEIT
ZU GENIEEN. [4] 
Warum wir allzu hufig das Neue dem Alten vorziehen, ohne Rcksicht
darauf,
ob jenes auch wirklich einen Fortschritt bedeutet, sondern schlicht
und einfach aus dem Grund, weil es neu ist. 
 JETZT IM UNI.DE MAGAZIN [5] 

Links:
------
[1] http://days.Is
[2]
http://britastro.org/baa/index.php?view=detail&id=1473&option=com_joomgallery&Itemid=200
[3]
http://britastro.org/baa/index.php?view=detail&id=1474&option=com_joomgallery&Itemid=200
[4] http://uni.de/redaktion/neu-ist-immer-besser
[5] http://uni.de/redaktion/neu-ist-immer-besser