Two Comets in the 
Morning Sky - Comet C/2012 F6 Lemmon
and Comet C/2010 S1 Linear
September 27, 2013

 
 There
            are several faint comets now in the evening sky, and two are
            presented here. Both are 12-13th magnitude and have faint tails
            of very low surface brightness. These images were taken with
            the 12.5" f/5 and an ST10xme CCD camera. Both exposures
            are for 30 minutes total integration time. Comet Lemmon is near
            the head of Draco and is up many hours, but comet Linear S2 was
            in Vulpecula, which is high up, but into the trees next to the
            observatory within an hour! The field here is approximately half
            a degree wide.
 

            
Comet C/2012 F6 Lemmon
The comet shows a nice faint band like tail extending
to the lower left from the nuclear region in the center

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Comet C/2010 S1 Linear
Also showing a bit of tail, extending to the upper
left in this image.
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Lens:  12.5" f/5 Home bult Newtonian
Platform:  Astrophysics AP1200 
Exposure:  10min x 3
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing  7/10, Transparency 9/10
Outside Temperature:  55F
Processing Tools:  Maxim DL, Photoshop CS2
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