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Asteroid 558 Carmen

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#1 old_frankland

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Posted 07 December 2017 - 04:28 AM

Spent an hour tracking 558 Carmen, a pretty faint 13.6 magn asteroid presently in Cetus.  80mm APO @ f/6, Atik 414EX with IR blocking filter.

 

558-carmen_asteroid_invert_jferreira_06d

 


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#2 Planethunter80

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Posted 07 December 2017 - 07:01 AM

Incredible... Thank You for your post and image. bow.gif 



#3 einarin

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Posted 07 December 2017 - 07:36 AM

Nice to see asteroids here once in a while.

Looked up and this asteroid seems to have 11h period so with just a few nights could produce a light curve (granted I couldn't find how much brightness varies).

I just recently imaged asteroid  44 Nysa which has a period of only 6 hours and varies between 8.8 and 12.5 mag. Could only image about 1 hour but brightness variation was obvious.


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#4 old_frankland

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Posted 07 December 2017 - 12:19 PM

Nice to see asteroids here once in a while.

Looked up and this asteroid seems to have 11h period so with just a few nights could produce a light curve (granted I couldn't find how much brightness varies).

I just recently imaged asteroid  44 Nysa which has a period of only 6 hours and varies between 8.8 and 12.5 mag. Could only image about 1 hour but brightness variation was obvious.

How large a scope are you using for photometry?  I'm still in the dabbling stage, but am looking to do astrometry with my C9 once I get the computer time synch thing going.



#5 einarin

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Posted 07 December 2017 - 12:38 PM

Nysa is so bright that I could measure it with my 80mm refractor.

But I have done exoplanet transit measurements of a 13 mag star with my C8 scope.


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