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Obs Alert Mars & ISON Near Each Other Sept/Oct

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#1 ericj

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Posted 04 August 2013 - 07:39 PM

Hi,

Observing Alert: Mars & Comet ISON Near Each Other In Morning Sky Sept/Oct

Mars and Comet C/2012 S1 ISON will be within two degrees of each other in the morning sky in September 2013 and within one degree of each other in October 2013.

I was using SkyMap Pro recently to get an idea of how high in the sky Comet C/2012 S1 ISON will be in the fall.

I noted that Mars and Comet C/2012 S1 ISON will be with two degrees of each other in the morning sky in September 2013 and within one degree of each other in October 2013. So using SkyMap Pro I generated sky maps as they may be helpful to observers attempting to locate the comet.

In addition I have included tables listing the phases of the Moon for September and October.

The first map shows the track of Mars and Comet C/2012 S1 ISON from September 15th through October 15th. Both Mars and Comet C/2012 S1 ISON are in the constellation of Cancer in September and are in Leo in October.

On the maps there are track marks for every five days. The track marks on the left are Comet C/2012 S1 ISON while the tracks on the right are Mars. You will note that over time they are getting closer to each other.

The second map below shows the approximate 4 degree field of view through my TMB 105mm with a TMB 40mm 2" Paragon of Mars and Comet C/2012 S1 ISON on September 15th. It indicates that both Mars and the comet should fit into the same field of view.

However at this point it appears that the comet will develop more slowly in the autumn sky than originally thought, and may not reach naked eye visibility until November.

On the other hand if you have access to dark skies and a larger aperture telescope or do astrophotography you may be able to use Mars as a guide to locating the comet.

Here is a link to the sky maps and tables listing the phases of the Moon for September and October:

http://ejamison.net/...nt_obs11.html#1

Clear Skies,

Eric Jamison

http://ejamison.net/index.html

#2 frank5817

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Posted 05 August 2013 - 08:54 AM

Eric,

Thanks for posting this. The summer goes by quickly and the comet will be brightening for all of us to see soon.

Frank :)

#3 ericj

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Posted 05 August 2013 - 10:52 AM

Thanks Frank. Hopefully the comet will put on a better show than expected and we will get some nice views of it near Mars. The blue-green color of the comet would make for an interesting contrast with the orange and brown colors of Mars.

Best,

Eric

#4 Tommy5

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Posted 05 August 2013 - 11:02 AM

Sounds like a cool sight if we get clear weather and if ISON starts to brighten.

#5 Aquarellia

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Posted 05 August 2013 - 11:39 AM

Thanks for posting this ! Looks easy to catch...

#6 niteskystargazer

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Posted 05 August 2013 - 02:35 PM

Eric,

Thanks for posting these Charts for Mars & ISON Comet :).

CS,KLU,

:thanx:,

Tom

#7 Achernar

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Posted 05 August 2013 - 04:10 PM

ISON will also pass very close to Mars. So close that at the last time I followed it's approach, there was a small but real possibility of the comet impacting the planet. Most likely though it will miss but fill the sky from the surface. The planet and comet will not just appear to be near each other in the sky, at one point they will actually be close to each other.

Taras

#8 ericj

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Posted 06 August 2013 - 07:01 AM

Hi Tommy,

Yes it does sound cool if the weather cooperates and the comet gets brighter.

Best,

Eric

#9 ericj

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Posted 06 August 2013 - 07:06 AM

Your welcome Aquarellia.

Best,

Eric

#10 ericj

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Posted 06 August 2013 - 07:08 AM

Thanks Tom hope we all have clear skies for it.

Best,

Eric

#11 ericj

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Posted 06 August 2013 - 07:23 AM

Hi Taras,

Thanks, very interesting.

Best,

Eric






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